To install the TransGo 4L80E HD2 kit, we went to Nate Shaw of One Guys Garage to show us how it's done. He's installed these kits on several other big horsepower builds with really solid success.

We rebuild a 4L80E to do just that. ... Parts include a McLeod performance rebuild master kit (PN# 88075K, $618.75); Bowler Transmissions 300M hardened input shaft ...

Also note that the 4L80E does need to have a four-wheel-drive output shaft, ... (ORD Doubler kit, NP203 rebuild kit, and NP203 input gear). The other $840 went to necessary components for the ...

It's the 4L80E that’s become the go-to choice for backing a big-power/big-torque engine, and for good reason. With its roots in the TH400, which was used with GM’s biggest-torque big-block ...