I did a swap into my '94 3.23 A4 equipped car using an M28 tranny. It works fine and has plenty of low end grunt, but was considering a bump to 3.42's to help keep my car from surging in gear (mild just under 45mph). Has a 224/232 grind in it now that I'll be swapping to a cc306 soon. It runs 2100 at 80 mph, and will only run 2250 with 3.42's.

M28's came originally with 2.73's. Is it worth changing gears from 3.23's to 3.42's? I'll be adding a torsen HD posi and cover so I'll be down there to do it...

 

are you sure m28's have 2.73's stock?
i thought it was m29 2.73 and m28 3.23 (because the m29 is the viper tranny right? and has a steep first gear ratio)
maybe i'm wrong, i can't quite remember

 

m28 came in 93 cars with 2.73s, m29s with 3.23s.


and i hope the m29 is the viper, i just bought one

 

The M28 does have a 2.73 gear. And lets just say the tranny can take some power.

 

Yup. What gears are you running with your M28, IDOXLR8?

 

I am running a 3.50 gear but for a setup like yours I would recommend a 3.73.