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Old 09-22-2014, 01:28 AM   #2
Captainfab
60-66 Nut

 
Join Date: Mar 2007
Location: Coeur d'Alene, Idaho
Posts: 23,254
Re: Tranny and rear end combo question

The size of your rear tires play a part in this also. If you are running say a 235/75R15 then I wouldn't go any higher than a 3.42 gear with an OD trans. You do not want the lowest rpm's possible. Instead you want the engine to operate in it's peak efficiency rpm range.
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