'69 Corvette gear ratio

**earntaz** · #1 11-11-2018, 04:18 PM

Quote:

Originally Posted by big gear head

How can I find out what the original gear ratio was in a '69 Corvette? It's a 390 HP 427 with a 4 speed and it has 4.56 gears in it now. I have the rear end out for repairs. It belongs to my uncle and he is thinking of changing the gear ratio. The speedometer is way off and it's not much fun to drive very far.

Freddie -- check a stamping on the bottom of the rear end housing, just forward of the cover ... check out this site for codes. TAZ

http://www.corvettec3.ca/axle.htm

**RobR** · #2 11-11-2018, 05:23 PM

Freddie, I used to have a 390hp 69 Corvette 4 speed with air-conditioning, the default ratio was 3.08 to 1. I believe the same combination w/o air-conditioning was 3.36 to 1, Rob.

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