Originally Posted by
b1jetmech
I didn't tow with the 4BT, Ended up selling it before hand.
It had plenty of torque for being a 105 horse.
If your tranny goes out rebuild it. The 4l80E's are the strongest besides an Allison. When the TH400 was being designed there were no "bean counters" overlooking the engineers shoulders when designing the th400. GM added an over drive unit and made it a 4 speed. All the internals are made of steel which is why they are so strong. But, that's if you don't have other plans for a tranny conversion.
Chase
The 4L80E isn't all that strong. The inline engines tend to bring the weekness's out in em. There main weekness though IS the OD unit that GM added on.
1995 GMC 2500 SUBURBAN powered by 01 DURAMAX/ALLISON, 3.42 gears, 261 T-case
Trans has a mild build with ALOT of help from MIKE L. which included ALTO's for C1-C4 and a PI ML converter
DIAMONDEYE 4" exhaust with a CORSA muffler, AFE stage 1 dry filter, EFILIVE, KENNEDY single pump and pump rub kit.