Gmt 400 transmissions. It leaks, so I was looking to replace the fitting.
Gmt 400 transmissions. I'm not complaining. . Jun 28, 2012 · Is there a code in the glove box that tells you which transmission you have? If so, what are the codes for the transmissions? Customer: Will the transmission from a 1994 Chevy S-10 truck 2WD with a 4. So, I bought a 93 Sierra a couple months ago, had the trans rebuilt. ) Transmission crossmember from '97 C3500 ($50) 3. a fluid filter and fluid change will help, but some damage is already done so don't expect much of a change. 4. This database contains information based off of GM records, formal documents, literature, or firsthand experience. See pics. 7L, TBI. Slide the locking clip forward, pop the white locking clip up, and adjust cable by lengthening or shortening according to where you need it. modify drac for change in ratios if you care Jun 29 Jan 19, 2025 · Does anyone know the code or what transmission thats manual that i need to look for thatll bolt up to a 350 and the transfer case of my 1989 1500? Aug 16, 2023 · Starting a 4L80E information thread for those that want to learn more about these transmissions, how to service them, overhaul them or considering it for a swap into a GMT400 series truck, Squarebody or anything for that matter. In a branding change, GMC adopted the GMC Sierra nameplate for all its full-size pickup trucks, leaving the C/K nomenclature exclusive to Chevrolet. Then I got to thinking, everything is "in the way" Apr 26, 2011 · The second is the transmission/transfer case 40 Pulse Per Revolution (PPR) signal that is used in order to control the transmission. In this chart, you can find the transmission options that are interchangeable with a particular year of manufacture. 2002 chevrolet silverado 1500. Noteworthy for its sleek design resulting from meticulous wind-tunnel tuning, the GMT 400 embodied precision engineering, establishing itself as an icon of Aug 25, 2025 · Complete deep dive on the GMT400 GMC Sierra 1500: trims, engines, 4×4 systems, axles, gearing, specs by year, and common issues owners should know. I Feb 19, 2024 · The transmission was the 3 speed automatic TH400, and the 9. Sep 8, 2023 · The 1989 model year market the release of the Sport package for shortbed regular cabs, and the Z71 off road package. Thats was a fun lesson The fourth generation of the C/K series is a range of trucks that was manufactured by General Motors. I want to swap my man trans for a 4l60-e. Jun 10, 2021 · I have a 1998 c3500, motor swapped from a 350 tbi to a 454 with a demon 600. Mine in my 98 2 door tahoe did in 2014. What are the transmission options and how does the wiring work out? Dec 2, 2009 · Here is my condensed history of the 88-98 GMT400 trucks. ) Dacco B82 4 Dec 16, 2021 · I'm looking for a new harness ether aftermarket or oem. Here you will find specifications and information for 1988 model year Chevrolet and GMC full-size trucks. I recently acquired a fairly clean ‘89 3/4 ton Chevy with a stock 350 small block. How can I Welcome to our database for 1991-2002 GM 3500HD, GMT-455 platform, chassis-cab trucks. I'm nearly finished with an engine swap in a '93 shortbox C1500. Wondering if either is a bolt in, and what years are compatible. Increase your 1988-98 Chevy or GMC C1500 truck's fuel economy with this 5 and 6-speed kit kit from American Powertrain. 45:1 original spicer non-positive rearend. Oct 21, 2025 · Identify vehicles that have the donor parts you need. 5" rear differential, TH400 transmission, and suspension/steering upgrades. Click to expand Thank you for joining! We need help with all the tranny problems these old trucks throw at us. I installed them and everything went good. Sep 23, 2025 · 89 K1500 1rst to 2nd hard shift. Would it benefit me to add a fan driven external transmission cooler? I'm consistently towing 11,000 fully loaded and my Sep 11, 2023 · For 1991, the new low-cost W/T trim was release. instructions mentioned that the Mar 12, 2025 · I am currently taking apart my 1992 chevy k1500 z71 with the 5. 5″ rear differential, TH400 transmission, and suspension/steering upgrades. 1988 - 1998 (GMT400) - 1988 - 1998 (GMT400) - The ultimate forum for latest news, discussions, how-to guides, and technical help on the 1987-1988 Chevrolet and GMC trucks. Mar 1, 2012 · Here's where I'm at with my parts research so far. Jun 8, 2020 · Hey Gents, I currently purchase two 60 inch straight lengths of 5/16" line for my new transmission (Olds TH400 in my dually), and was going to bend them to fit, probably have to re-flare/double-flare one end which is fine as I have the tools. Feel free to comment or ask questions if you need anything. All the fluid exchange machines I see online are very expensive, and use an electric pump. I was wondsering what brand and type of tranny fluid is the best for towing conditions? I was also looking at a B&M transmission pan that has a 3 quart extra capacity versues the stock pan and it is Dec 20, 2023 · On my girls 1990 K2500 with the 5. Search for potential donor cars and trucks by engine, transmission or wheelbase Quickly identify your transmission by family, years, and gear count. 73 9. I've always understood that the conditioners are good to use but once they do their job and swell up the old seals, but you should do a fluid and filter change shortly after. It's a small block with a 700R4 and long tube headers. 1 is in the dumpyard already, as I got a carbureted 7. I cant seem to find large plastic containers with petcocks to make such a thing with. Feb 12, 2011 · I would like to put a transmission cooler on my truck--'88 5. It turns out that early the NV3500 only went into GMT400 trucks in 1993; prior to that, these trucks were equipped with a dastardly Getrag five-speed — the 5LM60, also called the HM290. Compare bolt patterns, see common applications, and jump straight to the right parts or complete remanufactured units. ). I just bought a beautiful 1990 K3500 4x4 with 454 & 4 speed manual. 3L V6 transmission should bolt up and take the bigger clutch and flywheel. Figured I would post here due to the non gmt 400 nature of this post. Apr 4, 2011 · I have a 98 GMC K2500 with a 5. It's got 252,000 hard miles on it. 7 350 small block to replace my blown turbo400 transmission with a 1995 4l60e. Then I lost 4th gear, and no overdrive in 3rd. I just replace the tranny with a freshly rebuilt one but im having same issues as before. May 28, 2013 · Finally in 1999 they migrated to the 4. No slipping, but based on the suddenness of the noise, from my research it sounds like the sun shell is cracked. What are some other good options for 95 2wd. As temperatures rise, ATF loses its ability to effectively lubricate and cool the clutches, bands, and hard parts, resulting in slippage or outright failure. I have no idea what to buy to convert my truck to the electronic transmission, i have heard i might need to buy a holley efi and ecm or holley tbi to Dec 5, 2021 · So black burnt oil is obviously a sign of an overheated tranny. The W/T was a stripped down fleet side, long bed, regular cab work truckthe 4. For automatics, it is assumed the convertor is locked. I decided to just keep the stock one in there and continue installing the kit. The truck is awesome, but really needs a 5th gear. I had an sm465 in my previous truck The year transmission interchange chart provides information about compatible transmissions for specific model years. If warm enough it flows into the external cooler through the tee after the thermal bypass opens, then through the radiator and then back into the trans. Aug 4, 2024 · Hey Everyone, my name is Ashton from Iowa. You should have a nv3500 if six lug or nv4500 if eight lug which is good both are regarded as the best five speeds for trucks gm ever offered. Here you will find specifications and information for 1989 model year Chevrolet and GMC full-size Browse GM OBS Truck (GMT400) products at American Powertrain. Hey everyone have 89 K1500 with new crate engine 5. Feb 2, 2024 · Trans is a different length I had to have a driveshaft made being it was a suburban you might can find one in a junk yard that'll worknfor your application Awesome, thanks! Was the NV3500 you used for a V6? I've read the 4. 3L V6 and manual transmission were standard. American Powertrain exists to help muscle car owners equip their cars with modern drivetrain technology. This page allows you to compare various gear ratios and tire sizes to find your engine RPM in each transmission gear. Jun 8, 2018 · I’m going to change my 94’ Z71 from and automatic transmission to a manual. ) Nelson Performance 4L60E to 4L80E jumper harness with speed sensor ($90) 6. [1] The GMT 410, GMT 420, GMT 425, and GMT 430 variants were derived for full-size SUVs, including the 1992–1994 Chevrolet Blazer and 1995–2000 Tahoe, and the GMC Yukon from late 1991 to 2000. I'm sure some of you have run into this problem where the driver's side collector ends up being right in line with the transmission crossmember and about 6 May 7, 2022 · Between the rebuild kit and the transmission, I have $400 in it so far. Only available on K1500s, the Z71 package included skid plates, Bilstein shocks, and Z71 decals. 5 rear end witch is the a c clip style semi float rear end. You'll Dec 18, 2013 · I'm due for a new tranny as my nv3500 is on its last leg. Jan 8, 2025 · Unfortunately, I was mistaken. Want to replace with the NV4500 Or the SM465. Sep 23, 2024 · The transmission wouldn't shift under 2500 rmp period, nomatter throttle input. Mine took longer (3 days) as I didn't have these instructions to start, had to backtrack Feb 11, 2012 · RPO codes: MG5: TRANSMISSION, MAN 5 SPD, GETRAG, 84MM, 4. It is a 2wd truck. I'm needing an overdrive tranny (5 or 6 speed) I know the best rout would be a t56 but at ~$1500+core and shipping and all the other goodies its way out of budget at the moment. Feb 16, 2018 · If you had the heavy duty 5 speed (NV4500) with granny low, it would take GM's "Synthetic Manual Transmission Fluid" which is part # 12346190, a 75W90 GL-4 fluid. Can trans fluid get into the x-fear case and come out this tiny hole. Any help Aug 8, 2018 · I have transmission fluid leaking from the weep hole in the rear drive shaft front yoke and my transmission fluid is low again. It has a 5 speed trans. I've seen a few post about removing the transmission but none answered any of my questions as far as i could see. Transmission shop that rebuilt the transmission, I ask them to put a corvette servo in it, but it shifts to hard. 7L engine? I've heard that these two transmissions are identical. Add in a hydraulic conversion kit from American powertrain, a clutch, flywheel, mount, and a Hurst shift kit, it’ll be about $2,000. I have never done this before on any vehicle I have owned. A/C and radio were not! The 454 SS was also updated with an more powerful 255hp/405ft-lb 454 V8, 4. Did the kickdown work? The kickdown should be computer controlled; and I'd expect the OEM computer wouldn't know how to handle a TH400 kickdown (but would be set-up to engage a TH700 converter clutch. These trucks are a hot spot in the market, get in on this today. The 4L60E found in many of our trucks is no exception Aug 24, 2021 · Hello I’m looking into manual swapping my 97 k1500 from a 4l60e. How difficult? What do i need? Has anyone wrote up an instructional on this? Thanks in advance. When trying to unhook the lines on the passenger side of the tranny, one of the fittings were seized so my buddy cut the line and used a brass compression fitting. Best Regards. Jan 7, 2023 · GM auto transmissions from 2005-and-earlier model-year vehicles that are no longer under warranty, where the OEM previously specified DEXRON III H, DEXRON II or DEXRON ATF. It leaks, so I was looking to replace the fitting Oct 30, 2022 · Hi everyone - I'm new here but I don't see an answer to this. 7 and rebuilt transmission 700r4/4l60 and rebuilt rear end. I also want to throw in the limited slip positractraction. Con someone experienced with this confirm that is what the leak appears to be? If so, Is the repair as straight forward as Jul 20, 2015 · JEGS Transmission Double-Hump Crossmember | Fits TH-400 Transmissions | Fits Most GM G-Body Applications Equipped With Small Block Chevy Engine | Black Powder Coated Finish Dec 9, 2009 · I'll play: trans #1- original 1996 4L60e, Transgo HD2 shift kit Corvette servo billit 4th servo stock converter mods did -okay- at best. This is a basic history of the C/K line of trucks. 3L V6 with 5 speed manual transmission for the base models for the GMT-800 platform. How do I find out what transmission I have? Jun 6, 2024 · Im swapping a 1993 k1500 suburban transmission and transfer case into a 1994 k1500 sierra, transmission and transfer case are the same in both? Gearing is only important in the rear axle and front diff? Any info is appreciated, thank you. I could not find a thread on here that outlined the actual differences in the automatic transmissions of our trucks. i wish it was like my sonoma where i could just drill some new holes and it was done. Dec 15, 2016 · My 383 is almost finished and will have a little north of 500hp and slightly more torque. From what I have read, the yoke has a permanent seal in the center that can leak. It currently has the 3 speed manual which I find to be horrendous for anything above 55mph. Is there anyone that makes one for the obs? Mar 13, 2022 · Newbie here- have atf leak from what appears to be the yoke at front ujoint. With the trailer weight of approximately 5k to 6k Here you'll find Turbo 400 Identification Information, specs, and general information about the TH400. Anyone have any recommendations? Jun 20, 2018 · There's an adjustment on the cable end where it attaches to the transmission shift lever. Hard shift from 1rst to 2nd. It only shifts into 2nd gear if i let of throttle at about 3500 rpm. Im trying to find out the best gearing in the rear end for towing and a lil better performance. 8 v8 with the 4l60e. Apologies in advance for a long post and thank you if you're reading it. the HD2 kit I got was missing a valve for it and I didn't notice until 1/2 way though the isntallation. Aug 16, 2023 · High performance and stock transmission questions and advice. Any suggestions for a shop in the Miami area? I'm leaning Aug 26, 2025 · This guide compiles trims, engines and transmissions, 4×4 hardware and transfer cases, axle ratios, dimensions, towing, year‑by‑year changes, and specs by model year—plus a concise list of commonly reported issues and quick owner FAQs. Dec 21, 2023 · Hi everyone--I read the sticky about transmission compatibility, and I'd like to ask for input about what to do, what it'll cost me, and what the problems might be. Convertor slip varies based on load and RPM so it is hard to model accurately. My question is this--Should I completely bypass the radiator all together, or do I find the return line to the transmission coming from the radiator and mount inline Jan 6, 2022 · GMT400 upgrades and performance parts information here. Generally the later your transmission was built the better it is. 7 and 700R4 transmission, we are going to get a smaller 2 axle trailer for weekends, either a conversion or from a manufacturer. If there Sep 11, 2023 · The 1990 model year featured a few exciting changes for the GMT400 Platform. Total time is probably about 6-8 hours for a first timer that is mechanically skilled. ) ACDelco 15767858 transmission mount ($32) 4. Apr 20, 2022 · Howdy all. Jan 21, 2014 · I have been compiling this info for a while, finally got around to posting it. GMT400 upgrades include suspension, engine, interior, accessories and more. 3l V6 in it. Internally The SS 454 package (RPO B4U) was released, combining the sport package with a host of performance upgrades including the L19 454 big block, 3. In Two Wheel Drive (2WD) applications, the vehicle speed sensor is located on the transmission extension housing. I've never heard of one failing in the radiator and filling the transmission with coolant, though. I talked to painless wiring and they suggested an universal gm harness (10415). Apr 15, 2018 · They hooked each to a trans cooler line, and filled one up with fresh fluid, then just used the transmission to pump the old fluid out and suck the new fluid in. I currently have a Getrag 5LM60 or nv3500 5spd and im wondering if i should replace it with something stronger. Dive deep into the versatile GMT400 experience. Dec 15, 2018 · Over the years I have collected a bunch of GM service literature. Jan 3, 2012 · I removed my turbo 400 and after buying brand new clutch, pressure plate, flywheel, throwout bearing, and the slave cylinder complete and some trans fluid the swap started. and that is the truck I have, old 4. It actually went both ways and killed the trans while also overheating the engine and cracking the heads. And that tells me it's probably time for a new trans. Transmission in my 1991 k1500 V-6 is shot. I BELIEVE all this is correct, but feel Aug 26, 2025 · This 3D-printed replacement insulator for discontinued GM manual transmissions (1988-1998) offers superior durability and sound absorption over the original factory part Sep 8, 2023 · For 1988, the fourth-generation Chevrolet and GMC C/K was introduced, including (1500) 1⁄2 ton, (2500) 3⁄4 ton, and (3500) 1 ton pickup trucks. Trans Output Speed = Transfer Case Speed. Sep 3, 2024 · In most 5-speed transmissions, 4th gear is direct drive, meaning that the countershaft is uncoupled and the input shaft couples straight to the output shaft. If it's the second part, why? There are sites that list every single RPO code GM made and you can search them alphanumerically. This same p Aug 16, 2023 · I rebuild transmissions (bench builds mostly), specialize in General Motors so am very familiar with the 700R4/TH350/400, 4L60/65/70 and 4L80/85Es. May 8, 2022 · When you install an aftermarket transmission cooler, do you have to put new cooler lines from the transmission or can you extend the stock lines. 3L engine (4L60E) be compatible with a 1994 Chevy truck GMT-400 2WD with a 5. The SS 454 package (RPO B4U) was released, combining the sport package with a host of performance upgrades including the L19 454 big block, 3. The companies listed in the Source Box also make wiring harnesses that can help with late-model swaps. com. It's got a th400 with a 4. This was for for any gear (1-2, 2-3, 3-4). 7 and it is use mostly to pull my 24 travel trailer around. 3 Feb 2, 2025 · One wonders if the original TH700 died, and the owner at that time put a 400 into the truck knowing the 700s were fragile. Dec 10, 2020 · I bought a 92 Chevy 2500 4x4 truck it doesn't have a transmission in it it was a straight drive I have a 94 s10 4x4 automatic can I put the transmission out of the 94 s10 in the 2500 the s10 has a vortex 4. Oct 21, 2025 · Use The Transmission Cross Reference and Interchange Chart To Find Transmission Compatibility Look up a trasnmission by model number and view vehicle applications and compatibility; or search for a vehicle by make and model to display applicable transmission (s). Dec 30, 2021 · So I finally ordered my atk 383 stroker performance motor. 4 on it, but it is too short geared on 4 speed and 3. 00 1 MM5: MERCHANDISED TRANS, MAN 5 SPD PROVISIONS Don't mean to sound stupid, just curious what the laymans term for it is, and whether its a decent one worth reusing, thanks in advance. Dec 30, 2017 · If you're looking at a GMT 400 with an auto, it has a cooler in the radiator. There is a lot of confusing, contradictory, or misleading information out there regarding these trucks. 1990 454 SS’s were only available in Onyx Black with Garnet Red interior. Oct 28, 2019 · wondering if anyone here would be kind enough to send me in the right direction. 73:1 ratio. The countershaft bearings are unloaded so they quiet down. Nov 30, 2015 · For all you low riding crazy guys what are you guys doing to remedy the transmission cross member that has its bolts sticking out the bottom of the frame. The radiator has a built-in transmission cooler. 10 rear gear. Background: I love my suburban, I take it everywhere (40+ Apr 26, 2010 · Just like the title says I could use either some pics or a detailed description on where the stock transmission lines run, from the transmission up to the radiator. The GMT 400 and similar GMT 480 was the platform used for the Chevrolet C/K and GMC Sierra full-size pickup trucks beginning with the 1988 model year. I’m looking into the idea of a 4l80 swap and was wondering if anyone has a Mar 12, 2013 · After trial and error, here are the best steps I think to remove the 4L60E automatic transmission from my 97 K1500 Z71. Nov 14, 2022 · Mar 13, 2011 Messages 5,939 Reaction score 350 Location Clinton Township, Michigan longer driveshaft, if its 4wd swap input splines of tcase, shifter, trans, dipstick, vacuum hose and a souce per your investigation, walter engineering vss adapter possibly or other, also depends on 2wd or 4wd. I posted this in the engine performance + maintenance The 1990 model year featured a few exciting changes for the GMT400 Platform. Upgrade your transmission today! Jan 3, 2024 · The GMT 400, a revolutionary GM platform introduced in Chevrolet trucks from 1988 to 2000, stands out as a pinnacle of innovation and versatility, surpassing its predecessor, the "square body" generation that concluded in 1987. I put a 350 in it. And while comparing prop shafts between my stock 1995 C1500 4L60E RCLB driveshaft(15004101), and the one for an 88 C2500 TH400 RCLB(12475006), I noticed the yokes are identical part numbers Feb 2, 2021 · What auto trans came with 93 chevy 3500 cab and chassis short wheel base 350 v8? May 1, 2023 · GMT 400 common problems guide for truck enthusiasts, covering mechanical, electrical, and rust issues, with maintenance and repair tips. Transmission Digest — a publication devoted to the transmission repair industry — has a whole page on the HM290/5LM60, and it’s bleak. Jun 29, 2023 · If you can R/R the trans, you will likely save him between 400-800 or so depending on what your local market bears for shops doing such work (out here a 2WD 4L60E R/R job is between $600-800 depending on shop, etc. Push the locking clip back down and Jan 5, 2010 · Lower the trans down onto the crossmember and mount the trans to it, check your vehicle manual/repair manual for the torque specs on the transmission mount, and use some locktite. 10 gears, and a 4 speed 4L80E automatic. Jan 10, 2022 · Hello everyone! I have an extended cab short box 350 with 4L60E that I’m swapping to an LQ9already replaced the reared with 14 bolttrying to decide on transmission leaning towards an nv4500 maybe zf6? Curious if anyone else has done the auto to manual swap while swapping to an LS and what Oct 22, 2022 · Hey guys. This includes engine ratings, drivetrain specs, and chassis dimensions. It helps vehicle owners and mechanics find suitable replacements or upgrades for their vehicles. Is that correct? Chevrolet C/K GMT400 (1988-2002) Introduced for 1988, the GMT400 trucks became the fourth and last generation of the C/K range of GM trucks, lasting for 13 model years. Nov 4, 2023 · It looks like my transmission on my 97 2 Door Tahoe K1500 is on the way out, got some pretty bad sounds coming from it now. ) 4L80E transmission from '97 C3500 ($500) 2. Both models will have the gm 9. Thanks! Oct 7, 2023 · it's also possible to fit in the newer 6 speed transmissions, though custom mounting and driveshafts may be required 6l80e transmissions share the 32 spline output with the “HD” transmissions of older generations like the 4l80e, and manual transmissions. I'm trying to drop out my trans from a 91 k1500, and it's very rusty ( thanks ohio ). These are the best longitudinal automatic transmission GM ever In this video, I show the journey of taking my 1998 K1500 with a 4L60E automatic transmission and converting it to an NV3500 manual transmission. Right now my big issues is removing the rear drive shaft, what size bolts are on it where it. Apr 1, 2017 · Are you just trying to decipher a specific truck's RPO codes, or are you trying to get a full list of every available RPO for all GMT400s? If its the first part, go to compnine. 5″ SF rear differential had a 3. Understanding Transmission Interchangeability What Is A May 24, 2022 · Hey all, I have a 96 GMC 1500 with 5. Pickup trucks still remained the only body styles available in the GMT400 platform. While I was replacing the half-assed brake lines in my truck I discovered that one of the previous owners hacked off the stock Aug 24, 2025 · Complete deep dive of the GMT400 Chevrolet C/K 3500: SRW vs dually, engines & transmissions, axles/gearing, towing basics, model‑year changes, and issues. Mar 17, 2024 · Hi, i have a 1994 chevy k1500 silverado. Are there any drop-in 5 speed manuals that will fit without modifications? Jul 13, 2017 · Hello everyone. Marketed by the Chevrolet and GMC brands from the 1988 to the 2002 model years, this is the final generation of the C/K model line. Currently dont have posi and this is a 4wd application. ) PCM tune from Black Bear Performance ($15, price of shipping) 5. My 92 C2500 still has it's OG 4L60 with the TV cable control. Links to PDF Scans of service and STG manuals and a links to the Parts manuals. It’s a 5 speed manual probably the 5lm60 but not sure. The radiator is like new and I did just run all steel transmission cooler lines. 7 engine, if that makes a difference. Jan 12, 2021 · So in my infinite wisdom, I am looking for driveshafts/yokes for my TH400 swap that is behind my LS swap. Final Drive, Transmission Ratios, and Tire Diameter can all be manually edited if needed. What about the transmission? TCI and Advance Adapters both make flexplates that allow you to keep your Turbo 400 or Turbo 350/700-R4 transmission. Aug 17, 2011 · Now you should have the confidence to swap in some real power and slam the pedal to the floor. 1. Feb 2, 2025 · Put A 5 or 6 Speed Stick In Your GMT400 1988-1998 GM Truck with an American powertrain kit. Apr 10, 2023 · The fluid flows as listed: Out of the trans (hot) to the external cooler, if the fluid is too cold yet it will travel right back into the trans through a tee fitting. Nov 22, 2021 · I have a 1991 Chevy k1500 that originally had a 4. ) GM Performance 12554824 flexplate ($119) 7. Drop the shift lever into neutral, and move the transmission lever by hand into neutral as well, then they should be aligned. She slips on the 2-3 shift. Dec 16, 2010 · As many of you know, the number one killer of automatic transmissions is heat. Has the 700R4 transmission Apr 2, 2023 · Discover the iconic GMT400 truck platform's history, design, and legacy. What I’m wondering is if I should use an NV 3500 or an NV 4500 and will it bolt up to the transfer case I already have? Dec 20, 2023 · Is there a source for pre bent transmission cooling lines for my girl's 1990 K2500 extended cab truck? Has the 5. And once its in 2nd it is stuck in 2nd until i put the truck in park and shut it off. It will shift between 15-20 mph. 7l. ycot 8pkkbcr ak 4raok segtj vk w7r plsk tfj 4usszu