Cavi

where do I find out what rear end and ratio my 1994 base coupe with six speed has?

VetteMed

Six speeds had the 3.45 rear axle ratio. You can confirm this by looking at the stamped numbers on the bottom of the center chunk of the differential housing. they are tiny, and may be dirty, but they should be there.

Also, you can check the center console lid for the RPO Codes, Rear axle ratios usually are either GU_ or GT_. There's lookup tools available all over the web to find the right code.

QCVette

It should be a 3.45 ratio that is code GM3 on your SPID label.

GM1 = 2.59
GM3 = 3.45
GT7 = 3.33
G44 = 3.07


These and other codes are listed several places, but the one below is a pretty good site.

http://www.corvetteactioncenter.com/...94/94prod.html

Cavi

thanks, yes mine has GM3!!! It could even go lower like a 3:3 and I would be happy. I take it all the 1994 had Dana 44?

VetteMed

All 6-speed cars had the Dana 44.

James93LT1

Why would you want to go Higher?