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Old 04-10-2018, 12:03 AM   #5
Captainfab
60-66 Nut

 
Join Date: Mar 2007
Location: Coeur d'Alene, Idaho
Posts: 23,246
Re: Need help figuring out rear end gear

I agree on pulling the cover and having a look....there is no voodoo involved in opening up a differential. More than likely the gear oil needs changed anyway. It'll only cost you a couple quarts of gear out and a cover gasket. I'd be willing to bet your differential still has the 3.73 gears.
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