tranny

[grandprix00]

I have a 2000 grand prix gt the better tranny and i have a shift kit in there now and i was wondering what can i do to beef it up more b.c im lookin at putting a turbo in my car and a cam so i need something that would take it.

[BNaylor]

What do you mean by better tranny? Did you install a 4T65E-HD or an upgrade kit? How about the differential and passenger side axle shaft?

[grandprix00]

No i havent dont that yet but what do u think what i could do to if for the best of $ use that could take around 340hp or more b.c im taking out my whole engine and rebuilding it and putting all performance parts in it.

[BNaylor]

Originally Posted by grandprix00

No i havent dont that yet but what do u think what i could do to if for the best of $ use that could take around 340hp or more b.c im taking out my whole engine and rebuilding it and putting all performance parts in it.

As long as your tranny has no known issues it will be able to take that horsepower. The only difference between the regular 4T65E and HD versions mechanically are the differential and passenger side axle shaft so an upgrade of those parts would be a good starting point. The HD version has been tested to handle a duty cycle of at least mid 13 second quarter mile runs fairly consistently. You do not need to remove the tranny to do an upgrade of the differential or drive shaft. But if you prefer to do a performance rebuild on the tranny then there are plenty of parts available. Also, there is a company that makes the 65T Raptor and ZZP has trannies ready to go for the same cost of a rebuild.