How are T56's holding up?

[stanger88]

Assuming it is not powershifted or shifted over 6200rpm, or bridled with anything more than bolt-on LS1 power, how long can I expect my T56 to last (mile-wise) before it goes out?

[JonB]

It all depends. T-56's are pretty solid trannies they can take some abuse its more the stock clutch that is the weak link. There are alot fast t56 cars out there of course there not stock t56s either. I got 94,000 on mine and I beat on it all the time. A stock t56 can more than handle a bolt on ls1 assuming its well taken care of.

[Danger731]

Over 100k without major abuse. Abused like mine you get 75k. Same tranny in the Auston-Martin. Synchros, shift forks seems to be the common areas to go first.

[blackbirdbrain89]

yeap one day ull hit 4th hard and it will get stuck.... then it will start poping ou of 3rd and then start grinding gears in 3 and 4th...... if u put a new upgrade shift fork in ull be set for life as long as u dont make over 600 hp


note the t56 comes in
f bodys
mustang cobra
viper
db9
srt 10 ram
gto
and shears meany parts with vets

[N20LT4]

On my old '97 SS, my stock T-56 was good between the 450rwhp-485rwhp mark. As soon as I upped the boost and tipped over 500rwhp it wen't Kaboom. This was with regular to occasional drag use though.

[Cutlass]

yeap one day ull hit 4th hard and it will get stuck.... then it will start poping ou of 3rd and then start grinding gears in 3 and 4th...... if u put a new upgrade shift fork in ull be set for life as long as u dont make over 600 hp


note the t56 comes in
f bodys
mustang cobra
viper
db9
srt 10 ram
gto
and shears meany parts with vets

And Cadillac CTS-V

[stanger88]

And Cadillac CTS-V

and the Qvale Mangusta (sp*) IIRC, but I get the point