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#1
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'69 Corvette gear ratio
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.
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Freddie 1969 Camaro RS/SS396 (427) 4 speed |
#2
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Quote:
http://www.corvettec3.ca/axle.htm
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You've never lived until you've almost died -- for those who fight for it, life has a flavor the protected will never know! |
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big gear head (11-11-2018) |
#3
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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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big gear head (11-11-2018) |
#4
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If it has the original speedo driven gear you can get the color and go the the gear chart and find out the rear ratio.
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"Knowledge is good" Emil Fabor 67 L/78 Camaro SS/RS H-H,1W,2LGSR,3SL,4K,5BY. (Sold) 70 L/78 Nova M-21,Black Cherry,Sandalwood Int. 09 Pontiac G8 GT Premium,Sport,Roof. Liquid Red. |
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big gear head (11-11-2018) |
#5
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Thanks for the replies. I was wondering where the stamp would be. I'll check the code and see what it is. I have a 3.08 gear if that is what it turns out to be.
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Freddie 1969 Camaro RS/SS396 (427) 4 speed |
#6
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I would also post on the Corvette forum
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big gear head (11-11-2018) |
#7
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Code FA, which is for a 3.70 heavy duty with the 427. This explains why the speedometer is off so much. Thanks for the help.
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Freddie 1969 Camaro RS/SS396 (427) 4 speed |
#8
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That's the steepest gear you could get on a 427/390. It would be a fun combination.
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