Chevy 4L60E to 4L80E Transmission Swap. Goodbye 4L60E, Hello 4L80E. Ken Brubaker Writer Apr 01, 2010. This 1997 Chevy Suburban has a 5.7-liter engine, 6-inch suspension lift, and 35-inch tires.

You can think of this trans as basically a TH400 with a 25 percent overdrive tacked on. The 4L80E transmission was mostly used in 34- and 1-ton trucks and larger SUV applications beginning in 1991.

Chevy 4L60E to 4L80E Transmission Swap. Goodbye 4L60E, Hello 4L80E. Ken Brubaker Writer Apr 01, 2010. This 1997 Chevy Suburban has a 5.7-liter engine, 6-inch suspension lift, and 35-inch tires.