1992-1992 Corvette Gears

[sjcea]

With the GM1 rear axle ratio , what does the stock housing allow as an upgrade ? Wanted to lower the ratio from the stock 2.59 to at least the 3.07 ratio . is this possible ?

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[6speeder]

Yes

 

[Hib Halverson]

Many vendors offer either exchange rear axle assys or rebuild service with a ratio change.

Unless you're building a drag racing car with sticky rear tires and various driveline mods to match, I would not go lower than 3.07. Also, if you go lower, you take a noticeable gas mileage hit.

 

[sjcea]

3.07 is all I want . and should be more than enough to wake up the car off the line for my needs .the car is great from 40mph on as I am sure you all know ! I mean by today's standards its not super fast but it is a very respectable performer ! My last rum down the track got me a 13.9 . do we have any links for a rebuild service ? Or exchange service you can share ? Thanks guys

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[Hib Halverson]

Good choice.

CAC sponsor Zip Products offers an in-house drive axle rebuild and gear change service. Click here for more info on that.

If I had a D36 rear end and wanted 3.07s, that's the way I'd go. It's the best value other than doing the rear end yourself.

 

[sjcea]

Scored a used Dana 36 rear differential on eBay with 3.07 gears !! Looks in real good shape and is complete ready to install !! $275 shipped right to my door !! Can't wait !!

 

[mlm0]

does changing to 307 gears require any other changes in car such as ecm or something in transmission

 

[kpic]

does changing to 307 gears require any other changes in car such as ecm or something in transmission

In an 84 it is change the gears by removing the tail shaft housing.

 

[sjcea]

On a 1993 automatic corvette doing this swap does the chip have to be programmed for the gear change ?

 

[sjcea]

I think I did pretty good price wise !!

 

[sjcea]

View attachment 19220I think I did pretty good price wise !! And he claims its in real good shape !!