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Budget 10-Bolt Upgrade
The 8.5-inch 10-bolt is very similar in appearance to the weaker 8.2-inch rear. According to Moore, the best way to identify an 8.5 is to remove the cover and inspect the ring gear bolts. If the head of the bolt requires an 11/16-inch wrench (7/16-inch bolt diameter), then it’s an 8.5. If the ring gear bolt requires only a 9/16-inch wrench (3/8-inch bolt diameter), then it’s an 8.2-inch rear. Be aware that the ring gear bolts on the 8.5 are lefthand threads. View Related Article
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