strength/weakness of transmissions

[kozzman555]

i believe it was (oddly enough) in one of the 2jz cam swap into 1jz threads, someone mentioned that the r154 was kind of a weak transmission. that it could only handle around 350lbs/ft of tq before things started breaking. is this true and something i need to plan around when upgrading my car? how much power can my r154 handle? is there a way (other than a rebuild and cryo treatment) to strengthen them or will i need to upgrade to another tranny, like a custom t56 install or the v160(i think thats what it is)? any intelligent thoughts or advice would be great. thanks for your time

-adam

 

[tissimo]

R154 is good till ~ 600 range. Then it starts to depend on how you drive.

 

[kozzman555]

ah, so either i misread the post or the person was an idiot lol. thanks. since i have you, do you know what the stock clutch hp/tq limit is?

 

[tissimo]

ah, so either i misread the post or the person was an idiot lol. thanks. since i have you, do you know what the stock clutch hp/tq limit is?

It depends on the condition of course, but about 300-350ftlbs (at the wheels) is the limit.

 

[WesPatt]

Yeah, from what I've heard/read the w58 is the weaker one, holds roughly 350-400, and the R-154 can hold roughly double that.

 

[kozzman555]

awesome. that definitely puts my mind at ease now. thanks for your help guys

 

[Keros]

It also depends how you drive it. Unless you've reinforced things in the transmission, shockloading it can turn it into a slush box pretty quickly once you get into the 300's and 400's.

 

[FullNelson]

Not to hijack, but it goes along the lines, What are some good things to beef up the transmission? Are the Marlin crawler parts that much beefier?

 

[kozzman555]

nah thats a good question. what can you do to it to beef it up?

 

[zurud]

Cryo treatment and shot peen if you can afford it.

 

[FullNelson]

Cryo treat what, the bell housing? Or input shaft?:nono:

The only problems ive seen so far with the r154 is the 1st gear thrust washer.

 

[Doward]

The bearing retainer plate stock sucks hardcore. Get the MC HD Bearing Retainer plate and the MC HD 1st gear thrust washer, blueprint the transmission, and go to town!

 

[FullNelson]

I was going to ask about the bearing retainer plate also. I havent heard of any promblems from it, yet I figured MC wouldn't have gone through all the trouble of redesigning a part thats not broken.

Doward, your just the person I wanted to hear it from too.:drink1: