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Re: Rear Diff Carrier - Series 3 or Series 4
I believe that the 3.73 gear set for the 3 series carrier is the thick gear set. The three series carrier normally only goes as far 3.42.
Nothing wrong with thick gear sets (I'm running a set) just for very high performance applications there are drawbacks.
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Thanks to Bob and Jeanie and everyone else at Superior Performance for all their great help. 
RIP Bob Parks.
1967 Burban (the WMB),1988 S10 Blazer (the Stink10 II),1969 GTO (the Goat), 1970 Javelin, 1952 F2 Ford OHC six 4X4, 29 Model A, 72 Firebird (the DBP Bird). 85 Alfa Romeo
If it breaks I didn't want it in the first place
The WMB repair thread http://67-72chevytrucks.com/vboard/s...d.php?t=698377
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