Product Overview
This transmission is remanufactured and has a 2 year/24,000 mile warranty. If you are going to do it, do it right!
This transmission is warrantied for 450-500HP. If you are planning on Boosting or having more power than that, we have our Race Edition 4L80ER that is good for 1,000+HP.
History
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.
The 4L80E was introduced in 1991 in the GM C/K Trucks line-up, and remained in production through the 2009+ model year.
The 4L80 nomenclature denotes that the transmission is a 4-Speed, Longitudinally mounted, and for 8000 lbs. vehicle weights. It's RPO code is "MT1" and has been domestically manufactured in GM's Ypsilanti and Willow Run plants.
The 4L80 features ratios in each gear as follows: First: 2.48, Second: 1.48, Third: 1.00, Fourth: 0.75, Reverse: 2.07
