rear axle ratios - 1993

[Huckleberry]

What were the rear axle ratios offered from the factory on the aurtomatic equipped 1993 Corvettes? Mine has 2:59's .

I want to autocross in the stock class, but I don't want to run the 2:59's and I know that you can run another ratio if it was offered from the factory that year.

Another question would be, if 3:45 gears were offered with the 6-speeds, could I run those with an automatic and still be in the stock class, or can you just run with what was offered for the automatic that year?

Thanks

 

[Tuna]

The 'performance' ratio for the auto is 3.07.
I don't have a clue if using the 3.45 ratio is okay for autocross in the 'stock class'. It probably depends on the sanctioning body.

I'm not autocrossing now so I don't have any current rule books. I'm sure an NCCC or SCCA guy/gal will jump in here and give you a good answer.

Depending on where you want to autocross, if you don't ask or tell, you can probably get away with it.

 

[Huckleberry]

2 more things:

1) The sanctioning body that I race in is the SCCA.

2) Where is a good place to get prices for the 3:07's? I had someone check Richmonds(?) and all he could come up with were 3:08's.

Thanks

 

[Tuna]

I did a quick look at the MidAmerica catalog and found rebuilt stock 3.07 units there for 1100 + shipping and core charges. That's probably a good starting point.

Check with your local GM recyling place (junk yard) and see if they have one. Never can tell when someone will wreck a late C4.

Good luck.

 

[Huckleberry]

I did a quick look at the MidAmerica catalog and found rebuilt stock 3.07 units there for 1100 + shipping and core charges. That's probably a good starting point.

Holy crap! $1100 bucks?

The 3:08 Richmonds were $190 and with master bearing kit and labor it all came to around $700.

I think I'll keeping looking.

Thanks