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Message: <blockquote data-quote="338Shooter" data-source="post: 1665958" data-attributes="member: 3449"><p>With a 4L60/700R4 4.10s would be good for 35s, but 4.56s would work and would be better for you to go up in tire size later if you decided to. If it has 4.10s now I wouldn't rebuild it, but if it is 3.73 or 3.42 I'd probably go with 4.56 on the rebuild.  If that is the path you go, I'd look at the Tru-Trac locker for the rear and an E or air locker for the front. Maybe even try to find a 4.10, 14 bolt free float axle out of a 3/4 or 1 ton pickup.  That would be bomb proof on your blazer.</p></blockquote><p></p>