i have put in a new tremec t 56 and the car is dog. I am currently running 3:27 gears in a 9 bolt posi. will 4:11 go in and still be able to go on the freeway. currently I run about 70mph @ 2000 RPM. The old t 5 was quicker off the line and i think it had a lower first gear. Any help appreciate before i order the parts from 9 bolt .com

thanks
Dave

 

I think 4:11's would be perfect for that 6 speed and it would def help your car off the line. If you are afraid it will turn too many rpms go with like 3:73's or something but i think the 4:11's would be perfect. Should be around 3 grand or less at 70

 

thanks for your reply I wish I could hear from some one who has done it. I am going to get them from 9 bolt.com

thanks for your reply

 

no problem.. let me know how it works out, i am planning on putting a 6 speed in my car as soon as i can afford it.

 

If your using an aftermarket or a '93 model T-56 3.73's work perfect. If it's a used from a 94-up 4th gen 4.11's are the choice 95% go with.

 

It is a new aftermarket tremec t56 it uses the old t5 belhousing and clutch. i bought it from darkhorse.com for 1800 I can't remeber the gears but they were higher than the old t5 .

 

Then go with 3.73's. The T-5 has a .68 final OD and the T-56 you have has a .62 final. I've got my 3.73's in already and love them, should work out perfectly.

 

Im not sure but i am going to check the spec's on the final overdrive gear i think its .82 or something? i will repost tonite

 

It should be .62, thats what mine is. If it's .82 send it back, you got the shaft.

 

2.95 first & .62 sixth. I'd go 3.73's.

The T5 was not a .68 fifth in GM V8 applications.