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Rory McNeil · 10-26-2009, 10:52 AM

Normally the more teeth on the pinion the better. When I ran 4.88`s in my Mustangs 8.8, there was 1 extra pinion tooth than the 5.13`s. I had twice as many passes on the 4.88`s before we went to 5.13`s, and they still look fine. That said, on some diffs, notably the 8 3/4 MoPar, in the steeper ratios, the ring gear teeth get very short, and don`t seem to hold up near as well as larger teeth found on the "taller" ratios.

10-26-2009, 10:52 AM	#6
Rory McNeil VIP Member Join Date: Jun 2007 Location: from Vancouver BC Canada, now in Nova Scotia Posts: 1,311 Likes: 317 Liked 1,104 Times in 302 Posts	Re: stocker stick shift/rear end gears Normally the more teeth on the pinion the better. When I ran 4.88`s in my Mustangs 8.8, there was 1 extra pinion tooth than the 5.13`s. I had twice as many passes on the 4.88`s before we went to 5.13`s, and they still look fine. That said, on some diffs, notably the 8 3/4 MoPar, in the steeper ratios, the ring gear teeth get very short, and don`t seem to hold up near as well as larger teeth found on the "taller" ratios. __________________ NHRA 6390 STK M/S 85 Mustang