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4.11 to 3.9 possible?
Posted: Thu Oct 26, 2006 11:42 pm
by shemoves
Would it be possible to turn a 4.11 final drive tranny into a 3.9 FD?
Posted: Fri Oct 27, 2006 12:10 am
by BSOD2600
I'm curious why you want to go back to a 3.9?
Posted: Fri Oct 27, 2006 12:58 am
by Manarius
Umm, not without replacing a lot of things in the tranny. Might as well just go get a 3.9 tranny and matching rear diff.
Posted: Fri Oct 27, 2006 2:45 am
by shemoves
some backstory: I am going to be replacing the tranny in a '92 SS. I have found a great match (STi ver II, 4.11, but short RA ratios).
I am trying to get some more out of the gearing so I don't have to have the car at 3600+ rpms to go 80.
I have considered just swapping out 5th gear, but I don't know where to get a long 5th gear that will fit.
Posted: Fri Oct 27, 2006 6:23 am
by 555BCTurbo
You will need to change out the ring and pinion in the transaxle with a 3.90 one.
Kind of a bitch if you ask me...
Posted: Fri Oct 27, 2006 7:34 am
by shemoves
seems like my best bet is a 5th gear from a wrx. I just hope it'll fit...
Posted: Fri Oct 27, 2006 5:51 pm
by 555BCTurbo
That sounds like even more of a pain in the ass...
Posted: Sat Oct 28, 2006 12:10 am
by shemoves
dang it...what do the 2.2T guys do when their trannies go?
Posted: Sat Oct 28, 2006 7:49 am
by BSOD2600
My 4EAT is on its way out. I'm planning on getting a 5MT 3.9 put in during December...
Posted: Sat Oct 28, 2006 7:38 pm
by shemoves
BSOD2600 wrote:My 4EAT is on its way out. I'm planning on getting a 5MT 3.9 put in during December...
from a WRX?