6l80 transmission thermostat delete kit. October 20, 2022. The transmission fluid temperature of some 6L80 6-speed automatic transmissions (RPO MYC) and 6L90 6-speed automatic transmissions (RPO MYD) may be too hot under some operating conditions. Affected models include 2014-2020 Tahoe, Suburban, Yukon; 2014-2021 Silverado 1500, Silverado 2500HD/3500HD, Express, …

6l80e Thermostat Delete How To Delete 6l80 Thermostat, Our bilet 68RFE ZeroStat Transmission Cooler Thermostatic Bypass 2013-18 completely eliminates the thermal bypass Get the best. Home; Home › ... Cooler Flow Bypass Delete Kit for 6L80/90, 8L90 Transmission Digest.

Buy WIT WHATEVER IT TAKES TRANSMISSION PARTS, INC 6L80 6L90 8L90 Sure Cool System Upgrade STL010: ... ATP B-239 Automatic Transmission Filter Kit for GM Optional 6L80 Heavy-Duty 6-Speed Transmission. $23.39 $ 23. 39. Get it as soon as Tuesday, May 21. ... Active Fuel Management Delete AFM Disable Device RA003 Compatible with V6 V8 GM Motors ...6L80-CLR-BYPASS. Cooler Flow Bypass Delete Kit Fits 2014-on 6L80, 6L90, 2015-on 8L90, 2017-19 Allison Avoid Counterfeits! 6L80-VBPLUGS. Valve Body End Plugs

Supermatic 6L80 Transmission Controller Kit for LT Crate Engines REV 01FE24 PART No. 19432788 SHEET 2 of 24 System DO's and DON'Ts: Do: • Fill the transmission with the proper DEXRON®VI (P/N 88861037 US, Canada 19264717) oil using the approved procedure in this I sheet.The Superior Solutions 6l80 thermostat delete kit is a cost effective way to delete the factory thermostat and is very easy to install. Just like the pill flip method, you need to take out the factory thermostat but instead of reusing it, you replace it with the Superior Solutions kit. The view below from Precision Transmission (highly ...For 6L80 & 6L90 2014 up. For Sliverado Sierra Allisons 2017-2019. Item Type: Cooler Transmission Thermostat Bypass. 1 x Cooler Transmission Thermostat Bypass. Extends transmission fluid life. Instant fluid level check, so no more waiting for the trans to warm up and then cool down before fluid level check.6L80 Rebuild Kit 6L80E HD HP Automatic Transmission Master Overhaul Banner Box Set OPT Product Code: OPT-6L80-RB. $449.99 (5) Reviews: 1. Product Details. 6L80 automatic transmission rebuild kit. Fits: GM, Cadillac, Chevrolet, GMC, Hummer, and Pontiac. 6L80, 6L80E, 6L80-E, MYC 6 speed automatic.6L80 6L90 TRANSMISSION BELL HOUSING / PUMP BODY CAST 24248033 FITS '06+ GM 6-SPEED. Rating Required Name Email Required. Review ... 6L45 6L50 6L80 6L90 TRANSMISSION SHIFT KIT: TRANSGO SK6L80 FITS '06-'21 GM 6-SPEED. TRANSGO. $139.88 $119.77 $159.95. Add to Cart.6L80E Valve Body Kit 2006 - 2022. GM 6L80, 6L90 Valve Body Kit, Superior Shift Kit, 2006-2017, Stage 1, Stage 2. Valve Body Kit. Transmission Depot Offers a Wide Variety of Transmissions and Transmission Parts from the 1950's to 2000's. Call us Today For Your Transmission Needs.General Motors has revealed the new SuperMatic 6L80E six-speed automatic transmission for crate engine and aftermarket vehicle applications, rated at 650 lb-ft. ... but no sonnax kit to help the ...Complete 6l80e transmission parts diagram. View all parts of the internal 6l80e transmission.

Sonnax thermal bypass eliminator kit 72760-01K allows reuse of the OE cooler block with the built-in pressure relief by removing the old OE thermal bypass valve and replacing it with a plug that permanently allows flow through the cooler. Restore use of OE cooler bypass valve in various Chrysler RFE units, Aisin Seiki AS69RC & ZF8HP45/70 units ...How Much: $8.50 - Quito Teleferico / Free - Climbing Pichincha Volcano. Difficulty: Easy - Quito Teleferico / Moderate to Difficult - Climbing Pichincha Volcano. How to Get There: Schedule a taxi through your hostel for a fixed price (one way or return trip), or hail one on the street and negotiate a rate.Fits both E and non-E transmission variants • Applications include: 6L45, 6L50, 6L80 / 6L80-E, 6L90 / 6L90-E, 8L45 / 8L45-E, 8L90 / 8L90-E, 10L80 / 10L80-E, 10L90 / 10L90-E • Note: Has not been verified to fit Allison 10L1000 transmissions (RPO code MGM & MGU) TGM-100 DOES NOT directly connect to factory lines. After market

6L80 Transmission thermostat bypass kit. Added one to my 17 6-speed Fanny. Used to always hover around 195, now I don’t pass 155. I installed the Superior STL-010 last week along with a fluid & filter change and seeping cooler line repair. Previously I'd seen trans temps as high as 205 in hot weather with stop and go traffic.

Update to this Video there is now a GM option available for the 6L80. Both seem to work the same. The SURE-COOL is a must-have for the 14+ 6L80 and 6L90 tran...

Sonnax Transmission Company 2 Imtec Lane, Bellows Falls, VT 05101-0440, USA. 800-843-2600 · 802-463-9722. Contact Us. Find top-quality 6L80, 6L90 performance transmission parts to enhance any build, from tuning pressure and restoring valve body function to ramping up shaft and clutch durability.This fitting fits the GM 6L80E 6L90E 8L90E and 10L90E Automatic Transmissions. Fittings exit at the side to allow for fitment in tight transmission tunnels. This allows for easy tightening fittings also. The Motion Raceworks part uses factory bolt and seal style for easy to find parts and maintenance. The machined block has two 6 Oring ports.The Diesel Site 4RCDK Transmission Cooler Bypass Delete Kit allow greater fluid flow inside the 4R100 in your 1999-2003 Ford 7.3L Powerstroke. The 4R100 had an external cooler bypass tube that routed transmission fluid from the pump output back to the transmission's return line. Sadly, these bypass tubes frequently malfunction, obstructing the ...Specifications. The 6L80 denotes that the transmission is a 6-Speed, Longitudinally mounted, and for 8000 lbs. vehicle weights. It's RPO code is "MYC" and it is domestically manufactured in GM's Ypsilanti, Michigan plant. Newer to the transmission world is its use of direct clutch-to-clutch shifting and the total lack of bands.

0.551"/0.522" Hydraulic Roller. Dur. @ 0.050". 204°/211°. This particular kit includes the 430hp LS3 E-ROD crate engine, four speed automatic transmission with the proper torque converter, pre-calibrated engine control system & transmission controller. Chevrolet Performance engineers matched the engines and transmissions for optimal ...Presented by Sonnax. If you aren't sure which Sonnax GM 6L80, 6L90 4-5-6 upgrades are right for your transmission build, this video breaks down all the options. High Performance Product Line Manager Gregg Nader explains the different levels of clutch capacity available for stock/HD commercial and lightly modded street/strip performance vehicles ...6L80-CLR-BYPASS. Cooler Flow Bypass Delete Kit Fits 2014-on 6L80, 6L90, 2015-on 8L90, 2017-19 Allison Avoid Counterfeits! 6L80-VBPLUGS. Valve Body End Plugs Fits 2006-on 6L45, 6L50, 6L80, 6L90 PSR-5. …Mar 31, 2020 · Most full-size trucks and SUVs with a 6L80, 6L90 use a JMBX full-size (300mm) style converter. It’s a single-disc, non-captive clutch unit that is somewhat similar to late 300mm 4L60-E converters. When cutting the JMBX open, converter rebuilders report that a high percentage of units show extreme damage due to the clutch piston and front ...Thermostat Housings, Filler Necks & Water Restrictors; Catch Cans & Expansion Tanks ... Trans Go Automatic Transmission Oil Cooler Bypass Delete Kit, 6R60/6R80. Part Number: 887-6R80CLRBYPAS. Product Q&A View Now. Click image to zoom ... 125068000 Transmission Fluid Thermal Bypass Valve - 6L80 (0) $80.99. B&M 22300 - NAG-1 Locking Transmission ...Most common failure I have seen with the 6L80 transmission is pump failure that is due to high fluid temperature. Using this product will lower your transmission fluid temperature and extend the life of your transmission.In this video, we do a Camaro transmission swap. This is a custom-built one-piece drive shaft that went from a GM 6L80 transmission to a 1310 series at the r...Superior stl010 Transmission Cooling System Upgrade Kit For GM 6L80 6L90 Cadillac Chevy GMC and trucks 2014-up 8L90 8L80 8L90E 10L90 2016-up Superior Cooler Flow Bypass Valve Kit. 36. 50+ bought in past month. $3199.Part number - RMCSKSG1K-189. Buy 6L80 transmission parts from Raybestos Powertrain. New Racing/High performance Overhaul Kit. Seller location: US, Indiana, Crawfordsville ... the McLeod by Raybestos Powertrain 6L80E performance transmission rebuild kit utilizes Stage-1 red friction clutch plate material to deliver the competitive power and ...Verify engine is idling at 0% throttle. Verify transmission fluid temperature (TFT) is between 86°F and 122°F. Shift transmission through entire range - hold in each range for at least three (3) seconds. When complete, shift vehicle back into PARK. Remove Fill Plug.Browse high-quality OE and aftermarket auto parts to complete any repair or rebuild job, including rebuild kits, bushings, and pumps. Filter products by brand, price, and availability and receive your shipment same-day or next-day. Quality parts, coast-to-coast availability, superior service — transend is your partner for automotive aftermarket transmission and general repair parts.Automatic Transmission Parts Rebuild Kits Chevrolet 6L80, 6L90. 6L80, 6L80E, 6L80-E, MYC, 6L90, 6L90E, 6L90-E, MYD. (5) Reviews: 1. 6L80 Rebuild Kit 6L80E HD HP Automatic Transmission Master Overhaul Banner Box Set. $449.99. 6L90 Rebuild Kit 6L90E HD HP Automatic Transmission Master Overhaul Banner Box Set. $449.99.Learn how to identify which thermal bypass eliminator kit fits in various units by looking at the shape and part number of the OE cooler bypass valve. ... 6L80, 6L90; Dodge-Cummins Diesel; ... Sonnax Transmission Company 2 Imtec Lane, Bellows Falls, VT 05101-0440, USA 800-843-2600 · 802-463-9722 Contact Us.2.55K subscribers. 7.7K views 1 year ago. ...more. In this video we install the Superior Transmission Parts SURE-COOL thermostat delete for GM 6L45, 6L50, 6L80, 6L90, …6L80 Transmission Oil Filter. 1-Tub of Dr. Tranny Assembly Lube by Lubegard (Green light tack style ships standard. Let us know if you prefer the green "firmer style) This super master transmission rebuild kit, for GM's 6L80 automatic transmission, includes everything you need to rebuild your 6L90 transmission to better then factory standards.Please watch this video for benefits of and demonstration of installing a 6L80/90 Cooler Bypass Valve Delete Kit on your vehicle.6L80E SS Mega Monster Transmission Complete Rebuild Kit 2006-UP. Rated up to 750hp/700tq, Build your very own Monster using the same parts in our World Famous Transmissions. (A Torque Converter is highly recommended with this kit.) Monster Sale Price: $2,499.00. Buy in monthly payments with Affirm on orders over $50.Find many great new & used options and get the best deals for 6L80 - 6L90 Transmission Valve Body Shift Correction Kit Update Upgrade 2006+ at the best online prices at eBay! Free shipping for many products! ... Transgo SK 6L80 Shift Kit Fits GMC Chevy Cadillac 6L45 6L50, 6L80, 6L90 2006-on (#254609666824) 5***g (1235) - Feedback left by buyer ...

Learn how to identify which thermal bypass eliminator kit fits in various units by looking at the shape and part number of the OE cooler bypass valve. ... 6L80, 6L90; Dodge-Cummins Diesel; ... Sonnax Transmission Company 2 Imtec Lane, Bellows Falls, VT 05101-0440, USA 800-843-2600 · 802-463-9722 Contact Us.Also provided with this kit is a thermal bypass valve delete that allows fluid to flow to the cooler at all times; making this cooler ideal for drivers in hot climates. Like all Mishimoto products, our 2014+ Chevy Silverado/GMC Sierra 1500 V8 transmission cooler is backed up by our lifetime warranty with accident Protection for worry-free ...6L45 6L50 6L80 6L90 TRANSMISSION PUMP ROTOR KIT .708" THICK AFTERMARKET FITS '06+ GM 6-SPEED. 6L45 6L50 6L80 6L90 TRANSMISSION PUMP ROTOR KIT .708" THICK AFTERMARKET FITS '06+ GM 6-SPEED TRANSTAR. SKU: A104531CK. Condition: New. Availability: Usually Ships in 24 Hours. $98.77. $113.99An easy, no-hassle cost-effective drop-in Cooler Flow Bypass Delete Kit for General Motors 6L80, 6L90, 8L90 and Allison transmissions. Corrects/Prevents/Reduces: Provides all-time cooler flow regardless of …Retail Price: $525.95. Your Savings: $39.00 (7%) Part Number: TD104004A. Quantity. Add to Cart. Buy in monthly payments with Affirm on orders over $50. Learn more. Description.SLIVERADO SIERRA ALLISON 6L80 6L90 8L90 COOLER TRANSMISSION THERMOSTAT BYPASS. ... Cooler Flow Bypass Delete Kit for 6L80/90, 8L90 Transmission Digest. Add another measure of protection and increase fluid flow to transmission cooler increasing cooling capacity with the easy-to-install billet aluminum

Here's a way to run your transmission a little cooler, living in a country where summer temperatures reach 50+ degrees Celsius, it's never a bad thing to hav...Transmission Cooling System Upgrade Kit For 2014-Up GM 6L80 6L90 Cadillac Chevy GMC & 2016-Up 8L90 8L80 8L90E 10L90, Replace#STL010 Cooler Flow Bypass Valve Kit 3.7 out of 5 stars 19 1 offer from $16.991 016709, 1 14G708. 6L80 (2WD & 4WD) Raybestos Powertrain RPT shift-pro premium transmission filter kits eliminate leaks and reduce overall labor time. Ideal for commercial and DIY projects, RPT shift-pro filter kits come complete with OEM-sytle filters and OEM-style, re-usable transmission pan gaskets. INLET LENGTH 2.5", TAB SPACER HEIGHT 1.267".I have a 2014 Sierra with the same 6L80 transmission. There is a tsb from GM that says the transmission thermostat from the factory is set at too high of a temperature. It supposedly causes the transmission to grenade from heat prematurely. ... Flip the pill or install a Superior Technologies delete kit, part number STL010. I'd drop the pan to ...There is a tsb from GM that says the transmission thermostat from the factory is set at too high of a temperature. It supposedly causes the transmission to grenade from heat prematurely. GM sells a lower temperature thermostat replacement. However, I bought an aftermarket thermostat kit for about$45 and installed it myself. Took 15 minutes.6L80-6L90 Cooler Flow Bypass Valve Kit. This Superior Bypass Kit from Transtar (p/n A104996-5K) allows full-time cooler flow and lubrication to parts. The kit reduces the risk of overheating while under load and increases transmission fluid life. Fits 2010-2021 GM applications with 6L80-6L90 transmissions.Description. Superior’s part # STL-6L80E TransLab Engineered® 6L80E/6L90E valve body upgrade kit Corrects, Prevents, Upgrades and RETRO-FITS all 6L80/90 GEN1 & GEN2 valve bodies to GEN3 2014- up features without changing castings or plates. Product categories. Manufacturer. Product Transmissions.Automatic Transmission Parts Rebuild Kits Chevrolet 6L80, 6L90. 6L80, 6L80E, 6L80-E, MYC, 6L90, 6L90E, 6L90-E, MYD. (5) Reviews: 1. 6L80 Rebuild Kit 6L80E HD HP Automatic Transmission Master Overhaul Banner Box Set. $449.99. 6L90 Rebuild Kit 6L90E HD HP Automatic Transmission Master Overhaul Banner Box Set. $449.99.6L80 6-Speed Automatic Transmission Master Rebuild Kit With Pistons. Compatible with / Fits Chevrolet, Cadillac, GMC. 2006 - 2009 XLR RWD 2006 - 2009 STS RWD 2007 - 2013 Escalade EXT AWD 2007 - 2015 Escalade ESV AWD, RWD, 4WD 2007 - 2015 Escalade AWD, RWD, 4WD 2009 - 2018 Tahoe RWD, 4WD 2009 - 2014 Suburban 1500 RWD, 4WD 2015 - 2018 Suburban ...88k mikes, 6L80 transmission: Feb 2022: installed Range AFM deactivator to prevent going into 4 cylinders Spring 2022: noticed transmission temperatures consistently going into the 200°+ range and increased shuddering while shifting. Highest temp was 237° Sep 2022: installed “Superior Solutions” thermostat, but temps didn’t …Buy WMPHE Compatible with 6l80E 6l90E External Harness Repair Kit Chevy GMC 6L80E 6L90E, Automatic Transmission 6R60 6R80 6R75, Wiring Plug in Connector TCM T43, Harness Pigtail Repair 1292813 350-0168: Wiring Harnesses - Amazon.com FREE DELIVERY possible on eligible purchasesAbout Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright ...80 posts · Joined 2018. #1 · Feb 15, 2024. Good Morning. I recently purchased a 2014 Silverado with a 6L80E transmition. It has a factory transmition cooler. I have been reading about bypassing the transmition thermostat to extend the life. My truck has 142,00 mile on it. It is a daily driver, and does little to no towing except for ...We are The Simple Solution™… And the problem solvers of the transmission industry. We are the innovators of new technology and procedures. We manufacture our products at our world headquarters in Tallahassee, FL. And yes "Made in America" does mean something to us!Get the Best Performance with Trans Go Automatic Transmission Oil Cooler Bypass Kit, 6L80, 6L90 2014-On, 8L90 2016-On, Allison 2017-19 6L80CLRBYPAS parts at JEGS. ... Thermostat Housings, Filler Necks & Water Restrictors; Catch Cans & Expansion Tanks; ... Cooler Bypass Delete Kit. 6L80CLRBYPAS Features: Cooler Bypass; 6L80, 6L90, …Its good in heating up the fluid faster but during a heat soak, temp shoots up above 200F. That's what I have observed in my 2018 Suburban. 2008 Sprinter 2500 170 - camper van. 2001 Suburban LT 2WD, 5.3, V8 311,000 miles, leaks oil now at rear main seal. stock 4L60E on 5th filter/fluid change; 2nd set of drive shaft u-joints; rear diff new ...6L80 automatic transmission rebuild kit. Fits: GM, Cadillac, Chevrolet, GMC, Hummer, and Pontiac. 6L80, 6L80E, 6L80-E, MYC 6 speed automatic. 2006-up. This master overhaul transmission kit comes with the following rebuild parts: Full Transtec overhaul gasket set; Complete set of friction clutch plates; Front pump Teflon bushing; Internal high ...Learn how to identify which thermal bypass eliminator kit fits in various units by looking at the shape and part number of the OE cooler bypass valve. ... 6L80, 6L90; Dodge-Cummins Diesel; ... Sonnax Transmission Company 2 Imtec Lane, Bellows Falls, VT 05101-0440, USA 800-843-2600 · 802-463-9722 Contact Us.Time to learn how the transmissions knows when to shift and learn a few top secret tricks along the way!Link to PPT Guides and Bluecat Tool:https://drive.goo...

Find Automatic Transmission Cooler Bypass Delete Kits and get Free Shipping on Orders Over $109 at Summit Racing!

Mar 31, 2020 · Most full-size trucks and SUVs with a 6L80, 6L90 use a JMBX full-size (300mm) style converter. It’s a single-disc, non-captive clutch unit that is somewhat similar to late 300mm 4L60-E converters. When cutting the JMBX open, converter rebuilders report that a high percentage of units show extreme damage due to the clutch piston and front ...

Transmission Cooling System Upgrade Kit for GM 6L80 6L90, 8L80 8L90E, and 10L90-2014-Up Models, with Superior Cooler Flow Bypass Valve Kit (Replace #STL010) dummy ACDelco GM Original Equipment 24248008 Automatic Transmission Clutch Plate Kit with Friction PlatesAutomatic Transmission Rebuild Kit, 2007-Up 6L80/6L80E, GM, Kit. McLeod by Raybestos Performance Automatic rebuild kits are available for many transmissions as a one stop shop kit. The kits include National Oil seals and Far pak gaskets for superior sealing capabilities, PTFE coated rings for tighter seals, and OEM thickness grooved …Description. Superior’s part # STL-6L80E TransLab Engineered® 6L80E/6L90E valve body upgrade kit Corrects, Prevents, Upgrades and RETRO-FITS all 6L80/90 GEN1 & GEN2 valve bodies to GEN3 2014- up features without changing castings or plates. Product categories. Manufacturer. Product Transmissions.Sonnax thermal bypass eliminator kit 72760-01K allows reuse of the OE cooler block with the built-in pressure relief by removing the old OE thermal bypass valve and replacing it with a plug that permanently allows flow through the cooler. Restore use of OE cooler bypass valve in various Chrysler RFE units, Aisin Seiki AS69RC & ZF8HP45/70 units ...Mar 31, 2020 · Most full-size trucks and SUVs with a 6L80, 6L90 use a JMBX full-size (300mm) style converter. It’s a single-disc, non-captive clutch unit that is somewhat similar to late 300mm 4L60-E converters. When cutting the JMBX open, converter rebuilders report that a high percentage of units show extreme damage due to the clutch piston and front ...The 6L80E transmission is widely used in such popular GM applications as the Silverado and Sierra trucks, Tahoe, Suburban, Denali, Hummer H2, Cadillac Escalade, STS and CTS, Camaro, and G8 . The 6L80E transmission is prone to issues that include: 2-3 harsh or delayed shifts, harsh or delayed shifts from park or reverse, burnt 1-2-3-4, or 3-5 ...6L80 Transmission thermostat bypass kit. Added one to my 17 6-speed Fanny. Used to always hover around 195, now I don't pass 155. I installed the Superior STL-010 last week along with a fluid & filter change and seeping cooler line repair. Previously I'd seen trans temps as high as 205 in hot weather with stop and go traffic.Fits GM TBV BLOCK 2014-up 6L80/90 and 8L90/GM 8 speed. Allows you to re-use the existing GM block w/ lines and units listed in TSB Bulletin No. 21-NA-199 Built in safety bypass • Immediate cooler fill. • Immediate accurate fluid level check without warm-up cycle • Reduced average operating temperatures by as much as 30%Find Automatic Transmission Cooler Bypass Delete Kits and get Free Shipping on Orders Over $109 at Summit Racing!

new holland lx885 for salepay what you pull raffle 1 100del rio sunset obituariesbig y weekly ad 6l80 transmission thermostat delete kit venice beach florida water temperature [email protected] & Mobile Support 1-888-750-8692 Domestic Sales 1-800-221-4016 International Sales 1-800-241-9017 Packages 1-800-800-6762 Representatives 1-800-323-7301 Assistance 1-404-209-8808. Feature 13. Our Quick Ship Series Transmissions include a matching quality built torque converter. Quality Inspected for your peace of mind and ready to ship! Most orders can be delivered in a matter of days, if you need a transmission by a specific date please call 800-708-0087. A friendly, knowledgeable team member will gladly assist you.. used ankona boats for sale supermatic 6l80 transmission controller kit rev 18se19 part no. 19366636 sheet 1 of 26 all information within above border to be printed exactly as shown on 8.5 x 11 white 16 pound non-bond recyclable paper. print on both sides, excluding templates. to be unitized in accordance with gmcca specifications. date revision auth dr titleFind Automatic Transmission Cooler Bypass Delete Kits 8L90 Transmission Manufacturer Code and get Free Shipping on Orders Over $109 at Summit Racing! albany times union obituaries albany nyprintable free editable airline ticket template SKU: 804FC0185. $46.00. Quantity. Add to cart. Description. FITMENT. INSTRUCTIONS. Disclaimer. The EVP XR Series Thermostat Delete Kit is the best solution to keeping coolant flow on point while racing or running your high-horsepower Can Am X3 to the max. caremount lab locationswgog flea market New Customers Can Take an Extra 30% off. There are a wide variety of options. This is how i removed the inline thermostat on my 6L80 TransmissionWhat I used was a 1/4 inch tap set, and a stainless steel hex driven pipe plug. I dropped ...Clutch Failure. First Gear Slipping. Reverse gear engagement failure. Cracked clutch drum. Stator support issues. Cracks in the 1-2-3-4 Pistons. Issues with the 1-2-3-4 pistons are common in 6L80 transmissions. The piston typically gets cracks that result in clutch failure. However, GM updated the piston.TransGo has introduced the Performance Valve Body Reprogramming Kit for the GM 6L series. The 6L80 Tow & Pro kit utilizes technology to rework the 2-6, 3-5-R and 4-5-6 clutch regulator and boost valves that the company says will produce quick, clean shifts with increased holding capacity. The kit is made up of drop-in installation parts.