4l80e synthetic fluid, This build will handle well over 1000 HP assuming moderate RPM range (less than 7000 rpm), average or lighter weight vehicle, and no large N2O usage. Mar 19, 2012 · Having my transmission worked on and putting in a new torque converter. It will be used as a factory fill for all 2006 MY Hydra-Matic automatic transmissions starting on April 4, 2005, and it will be mandatory service fill by January 2007. When you change the fluid, make sure to use a high-quality synthetic ATF specifically designed for GM transmissions such Nov 29, 2012 · Has anyone used the new Dextron VI tranny fluid in an older 4L60E or 4L80E and did you have any issues? Some of the Dextron VI's I've seen are fully synthetic and some are a blend. 4L80E Transmissions - Durable, reliable, and ready for action. It was the 4-speed electronically commanded evolution of the 3-speed Turbo-Hydramatic 400, first produced in October 1963. Ive been thinking about using amsoil synthetic tranny fluid in tranny and t case. Aug 21, 2025 · One such transmission is the 4L80E automatic from General Motors. Perfect for Silverado, Tahoe, Suburban, Sierra & Yukon. Comprehensive guide to the GM 4L80E automatic transmission — history, specifications, development, technology, and Jeep conversion adaptability. 4L80-Es were optioned only in Chevrolet/GMC pickups, vans, and commercial vehicles, and the Hummer H1. May 2, 2015 · Hi gents, no replies in the trans forum, so trying here :confuzeld Is there a post or procedure for the 4L80E trans FULL flush, i want to manually do a full flush myself by unhooking the proper lines from trans to pump in new fluid and push out old fluid? Also, my local shop says never use any Jul 5, 2021 · Is Valvoline Maxlife synthetic ATF ok for use in the 4L80E? How many gallons will I need to do a full flush? Oct 13, 2018 · That clears up a lot! Thank you guys! Would ACDelco 10-9243 Professional Dexron VI Full Synthetic Automatic Transmission Fluid work well? Dec 11, 2008 · This fluid is the new service fill and factory fill specification for all Hydra-Matic GM transmissions. This particular automatic transmission has found its way into numerous heavy-duty vehicles, but interestingly, has also been used Dec 23, 2025 · The 4L80E transmission is a heavy-duty, durable automatic transmission primarily found in full-size Chevrolet and GMC trucks, vans, and SUVs from the early 1990s through the mid-2000s. Upgrade your Chevy/GMC today! The Stage 3 4L80E build adds the billet input shaft and rollerized billet forward hub for applications above 750 HP. This should be done every 30,000 miles or every two years, whichever comes first. What are your thoughts on this? Will it be worth the extra cost? What will i gain from using synthetic? Anything i should look out for? Thanks!. Dexron® III (H) or Dexron® VI can be used for service fill until January Sep 9, 2024 · 4L80E Transmission Fluid Change Regular maintenance of your 4L80E transmission is essential to keep it running smoothly. The GM 4L80E is a heavy-duty, four-speed overdrive transmission built to handle high horsepower and torque. It's a top choice for demanding applications like towing, racing, and off-road builds. One important part of this maintenance is changing the fluid regularly.


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