stock ring and pinion gears?

amplifier28

Member
Apr 16, 2005
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what are the stock gears on a 94 gt auto vert? would an change to 3.55 ratio gears make a noticeable difference? i would prefer a 3.73 ratio gear but i have not seen any speedometer gears available for an automatic to correct the speedometer. information greatly appreciated. thanks in advance!
 
you have 2:73s in now,if you decided to stay N/A and dont have a power adder for the future go to 3:90 or 4:10.

I did the 3:73s in my vert and notice a big difference.I got my speedo gear from 50 resto,i think i used the 3:55 one but it was only off by a small amount .
 
if you don't know what you have, look on the tab on the rear end. I dont know if anyone else has it but I have 3.27 with lockers from the factory.....curious if anyone else has the same rear end as me....

I had 3:27's also. I believe that they were the most common gear for the auto 'vert. The axle code is also on the drivers side door jam sticker. Code letter "E" is for the 3:27.

To the question about the speedo gear for 3:73's. It's the 21 tooth gear (auto) and 23 tooth (not exact but close) for the 5 speed.
 
I just put 3.55s in my auto and there is definitely a noticeable difference from my stock 2.73s. I used a black 23 tooth speedo gear and I am right on. From what I have read, 3.55s is as high as you can go if you want to just change the speedo gear. You could get a speedcal and go with whatever ratio you want.