Tranny & diff problem
Thread Starter
Racer
Joined: Oct 2008
Posts: 374
Likes: 0
Tranny & diff problem
HI Guys:
I own a c5 00 vette with a p1sc-1 procharger kit(6psi) and a ls2 engine. with a cam from wcc. I have ls6 intake with a 90mm snout and polish and ported tb, with a t56(m6 tranny with 3.42 gears). I am making 551RWHP on a mustng dyno. I went to the track and broke the main output shaft on the tranny and the diff. case. I fixed everything and have the vette running. I am in the process of buying a ECS transmission brace(which I did not have when this happened). A local guy offer a c5 Z06 complete diff with 3.42 gears and a C5 Z06 t56 tranny(m12). The tranny needs to be repaired. He says I wont shift to third everything for $900.00.
I have done lots of consulting and reading but have different opinions. The only thing everyone agrees is to install the ecs tranny brace. These are the suggestions:
1) Install the Z06 diff with 3.73 gears and upgrade my m6 t56 tranny.
2 Fixed the t56 M12 tranny and install it with the Z06 diff with the 3.42 gears.
3) Install a hardened output shaft and use the internals from a c6 z06 and install them in the c5 z06 diff case(they claim they fit)
what would you guys do? Any other suggestions?
The vette has Nittos extreme drag II radial tires(305-40-18).Would like to go to the track once in a while
Please HELP
I own a c5 00 vette with a p1sc-1 procharger kit(6psi) and a ls2 engine. with a cam from wcc. I have ls6 intake with a 90mm snout and polish and ported tb, with a t56(m6 tranny with 3.42 gears). I am making 551RWHP on a mustng dyno. I went to the track and broke the main output shaft on the tranny and the diff. case. I fixed everything and have the vette running. I am in the process of buying a ECS transmission brace(which I did not have when this happened). A local guy offer a c5 Z06 complete diff with 3.42 gears and a C5 Z06 t56 tranny(m12). The tranny needs to be repaired. He says I wont shift to third everything for $900.00.
I have done lots of consulting and reading but have different opinions. The only thing everyone agrees is to install the ecs tranny brace. These are the suggestions:
1) Install the Z06 diff with 3.73 gears and upgrade my m6 t56 tranny.
2 Fixed the t56 M12 tranny and install it with the Z06 diff with the 3.42 gears.
3) Install a hardened output shaft and use the internals from a c6 z06 and install them in the c5 z06 diff case(they claim they fit)
what would you guys do? Any other suggestions?
The vette has Nittos extreme drag II radial tires(305-40-18).Would like to go to the track once in a while
Please HELP
Former Vendor
Joined: Sep 2010
Posts: 682
Likes: 11
From: Anderson Indiana
With your application I would recommend the M6 with 3.73s. The car will pull harder in 4th gear and the lower rear gear ratio will get you closer to your optimum RPM through the traps. Shoot me a PM and I can work you up a deal if you want to get both your trans and differential built.
