come to find out its not pulling the waste gate closed on the turbo. When brake is used you must have proper tire contact with pavement. That wiring diagram is the same one that I have, only mine has highlighter marks all over it. Component slipping). I pulled the trans and sent it to the transmission builder. Chevrolet Express 3500 Check Engine Light With Code P1870 - 8 reports. My transmission finally gave up and I had to replace my transmission. If you are making any kind of power, go with the 4L80E. if your taking it easy, it slams into gear. Also never use brake as a line lock for burn out. 55 60-ft time. This wide selection of parts are used in the GM 4L80E automatic transmission in GM C and K series pickups, Chevy vans including the express, Suburbans, School Bus, Motor Home, GMC Sierra and Savan's. from what i was told, it could. US Shift Electronic Transmission Control Systems let you take charge of your 6R80, 4R70W, E4OD, 4R100, 4L60E, or 4L80E transmission and unlock its true potential. No pressure rise forward, limited to 130 in reverse. The GM 4L60E/65E/70E-4L80E/85E Diagnostic Code Book is designed to provide the technician with a step by step diagnostic approach to each and every transmission code available from 1991 to the 2007 model year. Contact Us. Inconsistent Shift Feel. Billet aluminum pump. and I am in stop and go traffic, it shifts hard into 1st and 2nd. The Hard Hat 4L80E retains its factory shift pattern and is a great option for stock vehicles that still want a stronger, longer lasting transmission than a regular OEM replacement. hard shifting 4l80e Hello, I had the same sypmtoms, with my diesel pickup, turned out my service trottle soon light was broken, pcm set default mode. A hard shift isn't always hard on a transmission. Find Shifters, Automatic Transmission with 4L80E Transmission Type and get Free Shipping on Orders Over $99 at Summit Racing!. Halfway to destination started shifting hard up and down in all gears. Would a first gen blazer do. In OD, truck shifts smooth through First, second and third, just wont shift to overdrive. Clearing the code PO894 makes it shift normally, but in a couple of miles of stop-n-go driving it starts again with the firm shifting. Please note, hard parts for the 4L80E can get extremely expensive, so we cannot offer a "ceiling" on hard parts cost for them, as we do other units. com your home for automatic and standard transmission parts. " Shift Stabilization occurs in the 4L60-E for only 2-3 and 3-4 shifts and in the 4L80-E for 1-2, 2-3, and 3-4 shifts. Chevrolet Express 3500 Transmission Shifting Hard from 1st to 2nd. dropped the tranny pan and saw a lot of metal shavings. The GM 4L80E Automatic for Max Power and Good Cruisin' Overdrive transmissions are great inventions. All street/strip transmissions also feature our manual/automatic valve body which allows you to select precise manual shifting or full automatic. A freind told me about it. You need an aftermarket transmission controller. No code setting while 1-2 or 2-3,. We also have the best aftermarket 4L80E 4L85E transmission controllers available. All other gears shift normal. lockup-no wires needed GM Chevrolet Chevy 4L60E 4L65E Transmission Parts. the trans only has around 35k miles on it but lately it seems like it shifts as though it has a shift kit. Our 4L80E has undergone a complete overhaul addressing industry and customer concerns. Now it runs in the 200-220F range with no load and no trailer under normal driving. Accelerating slowly from a stop it shifts fine. Transgo 4l60e Shift Kit Instructions Pdf 4L60E and AW55-50SN Valve Bodies and various products Our Mini Fold out Catalog digital version is available for print or download as an Adobe pdf. This service includes all new frictions, steels, bands, shift solenoids, rebuild labor, and dyno time. It shifts hard and fast. 4L80E Hard Shifting Jan 25 2012, 5:52am Hi, I have a 1992 silverado with a 4L80E trans. after some hard offroading my 4l80e tranny has decided to stop shifting into second gear. I would go gas if that was my budget and trailer weights. Redesigned and Upgraded kit FEATURES: Dual feed Direct Clutch, Heavy Duty Performance Shifts. Because it has the '7060 it needs a signal from the rear speed sensor inputted to B5 and B6 to function properly. putting in a rebuilt tranny would cost more than the car is worth. All other gears shift normal. I (Dale Follett) can write up how to make it work on a 4L60e too if theirs enough interest into it. When looking for online ford transmission parts and quality transmission auto parts we are the right shop. I'm running a '93 4L80e with an Optishift controller. My truck is a 1996 GMC 3500 dually, 4x4 crew cab. The one thing you need to be able to control an electronic overdrive transmission with confidence is simple. I'm having shifting problems during hard acceleration from a start and when tring to accelerate when already at a speed when the transmission downshifts. Order Now!. After all, if the shift position sensor can't determine if your vehicle is in the Park or Neutral position, then the starter motor won't get going-and you'll be left with a non-starting car. I was having the hard shifts between 1st and 2nd, as many others have described. The Hard Hat 4L80E retains its factory shift pattern and is a great option for stock vehicles that still want a stronger, longer lasting transmission than a regular OEM replacement. Mine was $1500 to get rebuilt. We also have the best aftermarket 4L80E 4L85E transmission controllers available. What table changes the firmness. 75 overdrive. I asked if a drain and fill w/new fluid would help. This will fit all1991 and Up 4L80E Models. To avoid any confusion with what name is used to identify them: Shift solenoid A = shift solenoid 1-2. found a stock 20k mile 04 trans for a good price ill be installing a TransGo HD-2 shift kit along with a 3000 stall. Click on our transmssion controller link for more information. For the car crowd, a quality transmission needs to shift hard, hold big power, and take a beating. So far, I've determined that its not a major internal hard part failure. Because land one is ground flat, oil flows behind the valve and is trapped because hole 22b is plugged. It is shifting into all gears harder than my c10 with a hard hitting shift kit. so figure the labor at about $500. Re: 4L60E Hard Shifts 11-13-04 10:14 PM - Post# 552071 In response to kingb36 Howdy king and welcome to CT, I will bet a code scan of the truck shows a P1870, there is a kit to fix this problem with your transmission. Because it has the '7060 it needs a signal from the rear speed sensor inputted to B5 and B6 to function properly. Also when the truck is still cold, it shifts normal. 5L Turbo Diesel. We also have the best aftermarket 4L80E 4L85E transmission controllers available. Problem started with it going into limp mode (sticking in 2nd gear) when I shut the truck off and restarted, then it would begin shifting again, with one weird excep. It is recommended that you replace both of these solenoids at the same time as they tend to go bad together. Flex plate: You will need a flexplate and spacer from ¾ ton GM truck that originally came with a 4L80E. Possibly reusing the same Transmission Fluid you need to drain out. Hard shifts are often caused by higher than usual line pressures in your transmission which could be caused by sticking valves in your valve body or dirty fluid. ok, on upshifts, it slams into the next gear, 2nd to 3rd is probably the worst of all. We can even base the shift pressure on throttle position so you can have a nice smooth shift at light throttle and a hard aggressive shift at wide open throttle. I have a 92 2500 chevy silverado 4 wheel drive with the 4l80e tranny. Also don't forget to use the R-1, 1-R shifting pattern when plowing, reduces the chance of loosing the reverse band, common on the 4L80e. thanks for any help 4l80e shift problems. An ignition switch that goes bad can cause a false shift solenoid code that comes up on a scanner. I (Dale Follett) can write up how to make it work on a 4L60e too if theirs enough interest into it. The TCI unit is $659. It is the dirty fluid and the crap in it that will cause the shift valves or selenoids to stick. 4L60E - 4L80E Trans Brake Operation. The tranny seem to shift rather hard if I am on the throttle at all. Original engine, 350ci runs great. What is a shift kit? Shift kits allow you to use inertial energy for forward motion with quicker shifts, for improved city fuel economy. Stock transmissions have always been set up by the factory to provide smooth shift performance to minimize customer complaints. More transmission support will be available in the near future. Now when at light to mid throttle, the shifting between all the gears is nice and easy almost not even noticeablebut at full throttle, the 1-2 shift delays a bit then kicks like a mule (I mean if you were holding a drink in your hand even with a lid it'd probably spill), 2-3 shift. Have a 2005 Silverado 2500HD 4x4 6. Circleville, OH 43113. Hard shifts are often caused by higher than usual line pressures in your transmission which could be caused by sticking valves in your valve body or dirty fluid. In other words it’s not mushy despite its small size and high stall speed for street driving. Tore trans apart Summer of 2014, found forward and direct clutches welded together. The gearing to move such a heavy load is a 2. Found transmission had been rebuilt before I got ahold of it as it had a transgo shift kit installed into it. Shifting Problems. I have a 92 2500 chevy silverado 4 wheel drive with the 4l80e tranny. Shift Solenoid B Performance / Stuck Off. Just got my F150 project running last thursday the 8th. Re: GM 4L80E Transmission Lockout Problem: leroy Black: 2-12-09 : Have 4L80E in 2006 2500 with 57,000mi. One transmission shop thought. This will fit all1991 and Up 4L80E Models. I would go gas if that was my budget and trailer weights. 3-4 shift valve. Keeps on going so far and haven't noticed any abnormal operation or hard shifting. worked on a 4L80E with a Trans slip could share their experience. Shift Solenoid B Performance / Stuck Off. 4l80e Below is a list of all the products, bushings, complete bushing kits, sleeves, hard parts, or services we offer listed by the type of transmission listed above. Page 3 of 3: Shift Solenoid A and B Tests (GM 4. Re: 4L80E Transmission Problems: chris kleve: 2-8-09 : Hi i have a 96 g30 van that shifts very hard into 2nd gear then wont down shift or up shift at all untill park it and shut it down for a while then will shift from first to 2 very hard but wont go into 3 or od. The adapter needs to be machined to fit the 4L80E, they index on differnt sized rings. The 4L80E has been used in a number of 1/2-, 3/4-, and 1-ton GM trucks over the years. 4l80e transmission problems along with 4l80e specs 4l80e no reverse 4l80e shift problems 4l60e transmission problems chevy 4l80e no reverse gm 4l80e transmission troubleshooting 4l80 transmission problems 4l80e shift solenoid location 4l80e transmission wiring diagram 4l80e transmission troubleshooting overdrive 6t70 transmission problems 4l80e shift solenoid diagram 4l80e troubleshooting. Average failure mileage is 98,000 miles. It is only applicable to Jake's Performance builds and customers. i rebuilt mine myself, with a Compushift controller, 10" FTI converter, and Transgo HD 2 shift kit-other than changing all the bushings, sprags, good clutches, larger front stater bushing and rear anti walk washer, just a basic rebuild and stock hard parts-it was a 2004 unit, so had most of the factory upgrades-im making 569 RWHP, beat on it. Text Us (740) 420-0004. Anyone hear of a kit to make a 4l80 into a full manual trans that does not need a computer, anyone run one of these I think it is called the 3 stick kit from transgo. 5 with a 4L80E that has started having extremely hard shifts and won't shift into overdrive. 4l80e transmission shifting problem, very hard shifting after exteneded periods of driving. Inconsistent shift feel, Shift solenoid filter blow-out, and Premature unit failure A complete pressure regulator valve train is supplied in the 4L80-E kit. I can drive for 10-15 minutes with smooth shifts but as soon as the transmission warms up I get this problem especially between 3rd and 4th. 4L80E Full Throttle Shift Issue If this is your first visit, be sure to check out the FAQ by clicking the link above. It is a 1991 Suburban, 3/4 ton, 4X4 with 244k miles. felt the hard shift from 1st to 2nd gear. - High Performance Street level pro-duces a slightly quicker and more ag-. Simple push button control allows for manual shifting with multiple integrated mechanical and RPM based safety lock outs to inhibit accidental shifting into Reverse or Park. This set contains the two 4L80E transmission shift solenoids found in the valve body. Tags: 4L80E, 4x4, buggy, full manual valve body with reverse shift pattern, Hyromatic Turbo 400, TH400, Transmission, turbo 400 2 Transmission: It’s the thingy that goes between the motor and the driveshaft that transmits the turning motion of the engine’s main output into different speed turning motions at the drive shaft. I got on it earlier today with my Camaro and noticed afterwards that it was shifting late. around 5 - 10 minutes, so let me tell you about my hard 1-2 shift". Û¢ 4L80E Power Tow Shift Correction Kit. perfect shifts, just like it always had. I have a 95 Camaro z28 wit the 5. 0Lwith only 115000kms on it over the last couple monthsthe4L80 transmission hasbeenhaving really hard shifts after drivingon the highway for 30-40 min in D4 the engine light comes on and the code p1870 comes up on the. If the command is given barring any mechanical failure clutches, Band ETC the transmission must make the shift or slip and burn. The truck shifts fine initially, then when the transmission warms to 150 deg. shift kit (transgo): 4l80e/4l85e, shift kit, new boost assembly, drop in valves, t34165e, 1991-09 returns on used hard parts that have not been installed are. Û¢ 4L80E Power Tow Shift Correction Kit. 5 with standard shift to 350 engine and 350 trans but now the rear end is making me tach out at 55mph or earlier. Original engine, 350ci runs great. 4L80E Hard Shifting Jan 25 2012, 5:52am Hi, I have a 1992 silverado with a 4L80E trans. While on the road, I can shift from D into 2 and it will downshift ONLY when going above 30 MPH. TransGo®, Mr Shift®, Shift Kit® and Reprogramming Kit™ are registered and licensed trademarks. " Nichols from Hughes says, "The 4L80E transmission family is the strongest GM overdrive transmission ever produced and installed in a standard passenger vehicle platform, and is arguably the strongest overdrive. Core must NOT have any hard part, or case. The engine is louder than normal when. The Hard Hat transmissions have a normal shift pattern for ease of driving, but are much more durable than a factory OEM replacement. either warm or cold there is no change, its shift very hard sometimes barking the 34inch tires from 1rst to 2nd gear. Problem started with it going into limp mode (sticking in 2nd gear) when I shut the truck off and restarted, then it would begin shifting again, with one weird excep. View all photos of GM 4L80E Series Transmission Basics - The Smart Tranny at This makes the transmission shift harder and reduces clutch slippage. or stuck off) and also P1870 ( Trans. A hard shift isn't always hard on a transmission. My first iteration had a fixed/bolted on yoke for a two piece driveshaft with splines only up to the seal that is 3. Despite its name, the 4L80E is not an upgrade to its GM counterparts. Try comparing the codes to the complaint; very often the two will correspond, such as a late shift and a vehicle speed sensor code. 0L and 230,000 kms or 144k miles. Text Us (740) 420-0004. Manual Shift Control 4L80E 4L85E 1991-09 in eBay Motors, Parts & Accessories, Car & Truck Parts / eBay. I also like that shifting up and down on hills is done in the GV rather than the less rugged T400. I'm having shifting problems during hard acceleration from a start and when tring to accelerate when already at a speed when the transmission downshifts. I am having a multitude of other issues all of a sudden When I accelerate hard (in 4th or 5th), it revs high but doesn't accelerate (as if I were in neutral). Don't know if that makes any difference or not. 4l80e is a good tranny. If you want power performance and durability all at a low price then you come to the right spot. A Used 4L80E Transmission. Because it has the '7060 it needs a signal from the rear speed sensor inputted to B5 and B6 to function properly. You can eliminate this feature by performing the following modifications to the valve body. I went through this with my Sierra. my fluid is clean, no burn smell i drove home from the desert and the tranny was shifting perfectly fine ( this was on a saturday). You hop into your car, turn the ignition key, shift to ‘Drive’ or ‘Reverse’, and there is a seemingly long delay before the transmission engages. Guaranteed lowest price!. Cancels all automatic shifts - puts the driver in control of all shifts by moving the shift lever. Shift Solenoid B is also known as 2-3 Shift Often only one of these fails at a time , but in the past it has been common to replace one of them , and then a short time later the other goes bad. 4l80e shift hard in all gears 6. Page 13- Ford C6 versus General Motors Turbo 400 Trash Or Be Trashed. theres adapters out there you can buy but they will prob cost 500 easy unless you find a 4l80e/205 which will be very hard. It began shifting hard after driving for about 10-15 minutes. dropped the tranny pan and saw a lot of metal shavings. In fact, the switch, whatever name you call it has a great deal to do with controlling what gear your automatic transmission is in and how it shifts, and when the torque converter locks up, as well as it’s original duties. i take it you have used this system. yeaup, from what i have heard, it is quite hard to break the getrags which came in the ///M bimmers, ICS finally broke one in their killer bee car after reaching over 1000whp The downside to those is the non-removable bellhousing. On a truck that weighs +6K lbs and with several tons of trailer hooked up to will have much more stresses placed on the drive train when a shift kit is installed. 4th will only work if the 2-3 solenoid gets enough pressure. The reduction in clutch slip may reduce the. Known as delayed engagement, it is one of the most common symptoms of problems with any automatic transmission. Part # 377000. The B&M PreRunner/Trail 4L80E automatic transmission is for use with all 1997-Up Chevrolet LS based engines with 2WD. Now comes the fun part: you can firm up the shifts in any automatic transmission. As a result, the 4L80E is a completely different transmission and doesn’t share anything in common with the 4L60E. Started last summer pulling the travel trailer. When a transmission shifts soft, it has to slip clutches and bands which causes the friction material to wear out faster. What parts you replaced etc. My motor turns on at 3500 rpm and I like to shift at 7000 rpm for first to second and 6500 rpm for second to third. Why is Your Transmission Shifting Hard When Hot? Transmission machine is a part of transmission system, which regulates the power that comes to driveshaft from engine to keep it in moderation. I'm also having a similar problem in my 04 3500 with a 6. 55 60-ft time. This comes at the expense of a shallower first gear, however, which hurts low end acceleration. The truck shifts fine initially, then when the transmission warms to 150 deg. The gearing to move such a heavy load is a 2. My transmission finally gave up and I had to replace my transmission. Navigation: Symptoms of a P1800 Code. I changed the filter and fluid and it's still doing it. In other words it’s not mushy despite its small size and high stall speed for street driving. Transmission problem 2000 Chevy Silverado V8 Four Wheel Drive Automatic I have a 2000,2500 HD 4X4 4 speed auto I live in a area that is 4700 ft above sea level, it seems like ever time I change alitudes above 4700 my trans starts shifting so hard it will snap your head, after awhile it will settle down and shift normal shifting pattern is perefect, no check engine light, no noiseI am wandering. Includes Boost Valve And Pressure Relief Valve. The reduction in clutch slip may reduce the. As a result, the 4L80E is a completely different transmission and doesn't share anything in common with the 4L60E. These transmissions develop various shifting issues which can present differently from vehicle to vehicle. Trust me I have tried and it takes hours just to install the kit. It can literally blow the servo cavity out the side of the case. 4L80E Performance Specs The 4L80E is a manual transmission that has a maximum engine input torque of 440 lb-ft and is capable of providing an output torque of up to 885 lb-ft. When I rebuild a 4L80E, it gets new shift solenoids, new internal harness, and until the recent national backorder they also usually get new pressure manifold switch assemblies. Okay, today I found out the hard way that there are multiple output shaft types inside a 4L80e 2wd transmission. 7L Vortec, 4L80E, and NP205. A hard shift isn't always hard on a transmission. Average failure mileage is 98,000 miles. Complaint: Transmission cracked or broken off engine around bell housing bolts. 7L pick up, van, SUV. However, locating the exact match to your vehicle is difficult and sourcing a properly functioning used 4L80E Transmission may take several installation & removal attempts before getting a good one. 2nd---4l80e was built wrong and failed within 200 miles 3rd--- tried a stock T-56 and tore the input teeth clean off 4th--- went back to a built 4l65e and its now broke within 1k miles now im finally going back to a 4l80e. We also have the best aftermarket 4L80E 4L85E transmission controllers available. If you're looking to soften up the shift of your vehicle, create a smoother ride and protect the transmission, the Hot Shot's additive is the one you want - one person described it as "restoring the missing comfort", and that says it all perfectly. Our 4L80E has undergone a complete overhaul addressing industry and customer concerns. A freind told me about it. The input and output speed sensors often fail or misfire, causing a variety of shifting problems---including erratic shifting, shifting slips, hard or soft shifting---or may cease shifting entirely. Would a first gen blazer do. 7 liter gas engine or the 6. Also when the truck is still cold, it shifts normal. I changed the filter and fluid and it's still doing it. 0Lwith only 115000kms on it over the last couple monthsthe4L80 transmission hasbeenhaving really hard shifts after drivingon the highway for 30-40 min in D4 the engine light comes on and the code p1870 comes up on the. Transmission electrical diagnosis troubleshooting help on all your transmission problems or questions. You should have four four gears until the transmission senses that the issue has returned. transmission shifts hard - 5. So far, I've determined that its not a major internal hard part failure. Just got my F150 project running last thursday the 8th. So I've found a few posts here, and I have a detailed Idea of whats causing my no overdrive problem. I had the 4L80E in my truck rebuilt after a major planetary failure. - Heavy Duty level produces a solid, noticeably firm shift when compared to the stock shift feel. I was having the hard shifts between 1st and 2nd, as many others have described. A plus over the 4L80E is that you can split shift it and make a 5 speed out of it, and I actually do that. Response is instantaneous regarless of load or gear. the shift kit would change the solenoids and the physical pressure in the trans/valve body, I don't think it would change the pcm program directly, instead that it would require the tune to take into account the fact that a shift kit was added, and change pcm parameters/shift points/firmess/traction control (if applicable). Also when the truck is still cold, it shifts normal. 0L with the 4l80e transmission. Our 4L80E has undergone a complete overhaul addressing industry and customer concerns. of torque, giving it a max load capacity of 18,000 pounds. Yeah, its a bus I have an issue with the automatic transmission, the 4L80E. Fluid is clean, no metal shavings, no burnt appearance or smell. 0L and 230,000 kms or 144k miles. Check your transmission fluid. they said no. The 4L80E transmission is the advanced progeny of the legendary TurboHydramatic TH400 automatic transmission, and is based heavily on the 400 in both parts and strength, yet featuring an added overdrive gear, a lock-up torque converter and advanced electronic controls. Automatic Transmission Shift Position Sensor Switch Products. All gears seems to work. replaced bulb, also take of battery poles for a minute, and everything works great again, When you startup your rig, and service trottle soon light don,t light up, you know. I would think that somebody would have figured this out but no answers yet. The truck is a 2002 chevy silverado 2500HD with a 6L and 4l80e. i take it you have used this system. and I am in stop and go traffic, it shifts hard into 1st and 2nd. The reduction in clutch slip may reduce the. We complimented the install with a TCI Outlaw shifter that contains two buttons for manually up shifting and down shifting the 4L80E. The 1-2 SS valve is a normally-open exhaust valve that is used with the 2-3 SS valve, in order to allow four different shifting combinations. The computer takes both of these readings in for the proper shifting and operation of this transmission. Duty For E4Od (Gas)89-E93,Aode/4R70W, Axode/AX4N,RE4 and Km Thru 97, Fits Heavy Duty 4L60E and 4L80E Thru 97. Now comes the fun part: you can firm up the shifts in any automatic transmission. A hard shift isn't always hard on a transmission. I then went to the Billet shaft and all is good for now. Each Heavy Hauler® is dyno load tested, on our one-of-a-kind SuperFlow transmission dyno, to 700 ft-lbs of torque. Kit Contains (1) 1-2 A Shift Solenoid (OEM # 24230288) (1) 2-3 B Shift Solenoid (OEM # 24230289). When a transmission shifts soft, it has to slip clutches and bands which causes the friction material to wear out faster. I have a 1993 chevy 2500 and it has the 350 5. pl 4l80e Forum. For that price a diesel is going to be hard. Hard shifts are often caused by higher than usual line pressures in your transmission which could be caused by sticking valves in your valve body or dirty fluid. The 4L80E transmission is known for sensor problems. Learn about this problem, why it occurs, and how to fix it. was it on a street vehicle or offroad vehicle? did you notice any differance in temp? did you leave the speed sensors in or are the plugs nessesary? was there any slippage or hard shifts while shifting under a load, or did you need to let off the throttle a bit? did you find the kit came with most everything needed to convert it to full. The Hard Hat 4L80E retains its factory shift pattern and is a great option for stock vehicles that still want a stronger, longer lasting transmission than a regular OEM replacement. I had a 4L60E in the car and everything worked fine, but when I upgraded to a 4L80E from Hughes performance, I can't get the transmission to shift higher then 1st gear. Your choice reverse shift pattern with or with out clean neutral, brake in any gear or (for safety reasons engine braking available only with clean neutral. Notice: Undefined index: HTTP_REFERER in /home/baeletrica/www/8laqm/d91v. Unfortunately though I can't figure out how to change the firmness of the shifts. Visit PTPTrans. Allison 3000 Transmission Bolt Torque Specs. Find TransGo Performance Shift Kits 4L80E-HD2 and get Free Shipping on Orders Over $99 at Summit Racing! TransGo's Performance shift kits give you the hard-launching, tire-blazing shifts you want, after just a few hours' work with basic hand tools. The plate was about $100. Guaranteed lowest price!. The Hard Hat transmissions have a normal shift pattern for ease of driving, but are much more durable than a factory OEM replacement. 4L80E transmission diagnostics for Isuzu NPR and NQR Trucks. Text Us (740) 420-0004. Re: 4L80E Transmission Problems: chris kleve: 2-8-09 : Hi i have a 96 g30 van that shifts very hard into 2nd gear then wont down shift or up shift at all untill park it and shut it down for a while then will shift from first to 2 very hard but wont go into 3 or od. I hear no noise or clunk when it does it, but there is a noticeable "jerk" when it shifts into second. found a stock 20k mile 04 trans for a good price ill be installing a TransGo HD-2 shift kit along with a 3000 stall. after some hard offroading my 4l80e tranny has decided to stop shifting into second gear. Have Peace Of Mind, knowing that your new 4L80E Transmission has all the Updates developed by General Motors Engineers combined with the Latest Industry Advancements providing Unparalleled OE Strength and Durability. Re: 4L80E shifts hard, your thoughts on the fix? Without a good scan tool it will be hard to proporly dianose this. Pulled the codes and got P0741 (tcc perform. For and additional 1000$ on top of everything I can include an ATS select shift, wire harness, and PCS 2000 standalone computer. I had it apart 30 k ago, it had the same 1-2 hard shift, and stuck some check balls in the vave body plate, and blew some through the plate, and had a cracked. That would be a C-6 transmission. felt the hard shift from 1st to 2nd gear. Cancels all automatic shifts - puts the driver in control of all shifts by moving the shift lever. Chevrolet Express 3500 Transmission Shifting Hard from 1st to 2nd. 00 third, and 0. Part # 377000 _____. 5 with a 4L80E that has started having extremely hard shifts and won't shift into overdrive. This write-up is for OPERATION OF THE 4L80E TRANSMISSION. Pictured below are just a few of the Updates & Upgrades that go into each 4L80E Transmission. This repair can cost from $500 and up. if you are under hard throttle, the shift is a bit smoother. History: I (Dale Follett) was tired of having my LS engine/4L80e transmission wired up for full manual valve body and wanted it to shift itself automatically like a factory unit. do not go to 0 on shift times with the early models of the 60e as i would see clutch bind. Shift Solenoid Filter Blow Out. For and additional 1000$ on top of everything I can include an ATS select shift, wire harness, and PCS 2000 standalone computer. hard shifting 4l80e Hello, I had the same sypmtoms, with my diesel pickup, turned out my service trottle soon light was broken, pcm set default mode. Halfway to destination started shifting hard up and down in all gears. The 4L80E is not without problems though, as hard shifts and losing the reverse gear are some of the most common problems reported from this transmission. I bolted it back up, added 4 quarts, then checked level per maintenance manual, and it still hesitates to shift into gear I ended up adding a pint per the dipstick, but it still will not engage right when I select the gear. *Must have a rebuildable core. If the command is given barring any mechanical failure clutches, Band ETC the transmission must make the shift or slip and burn. If the trans shifts very hard at this setting you can back off the cable a couple of clicks. The EZ-TCU package comes complete with a harness and shifter.
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