will a series 3 differential from a 1980 307:1 gear fit into a 1981 batwing?, am i able to change those 307 gears to a 391?

Asked by GuruZS9PZ Nov 02, 2017 at 06:29 PM about the 1981 Chevrolet Corvette Coupe RWD

Question type: Maintenance & Repair

I have a 1981 vette with stock 287:1 rear end gears, would like to use a 1980 differential with stock 307:1 gears (3 series) and put in 392:1 gears. will this work?

1 Answer
51,305

John answered 7 years ago

Yes but you might consider an aftermarket set-up. Stronger and more reliable. many on the market out there. OE exterior is or should be the same, the interior is the only difference and it's the gears. Race cars use a "quick gear exchange" set up if you want to change gears to fit your moods.

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