1980 Rear End Gear Ratio
03-29-2008, 04:46 AM
#1
Racer
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1980 Rear End Gear Ratio
Was a 3:55 the standard gear ratio in a 1980 vette ?? I have to get a new speedo driven gear for the trans (350) automatic, and am trying to figure out how many teeth gear i need. The drive gear in the trans looks to be orange and the car has 255/60/15 tires. Any idea what speedo driven gear( teeth) i need??? Thnx Dave 
Last edited by whiteflame; 03-29-2008 at 05:30 AM.
03-29-2008, 09:23 AM
#2
Melting Slicks
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NO! I'm not positive, but I think the ratio was either 2.87 (like my '81) or possibly 3.05 (maybe on th L-82s?). I'm pretty sure no 3.55 was offered then.
You can find out for sure by jacking up the rear end, having someone turn the rear wheel exactly one revolution and counting (measuring) how far the drive shaft turns.
God bless. Sensei
Last edited by a1sensei; 03-29-2008 at 09:25 AM.
03-29-2008, 09:42 AM
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Racer
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03-29-2008, 11:57 AM
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my 80 was 3:07 and i changed to 3:54 my speedo gear was 19 teeth changed to 21 teeth did not have to change gear in trans mine is also orange , call 1888 877 1008 patc transmission they were very helpful
