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11-16-2015, 04:15 PM
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Registered User
 
Join Date: Jun 2006
Location: Cape Cod, Ma.
Posts: 236
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Changing gear ratio question
Currently my 1966 GMC 2500 has 4.56 gears behind a SM420 four speed trans. I top out at 45-50 mph.
II wanted to find a 3.73 full floater, but came across a full floating rear with 4.10 gears. Will this be enough a ratio drop to get me to 60-65 mph
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1966 GMC 1 Ton 305 V6 SM420 4 speed - retired Fire Dept Support Truck from Little Falls, NJ My GMC Photos Last edited by wcstory; 11-16-2015 at 04:26 PM. |
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