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Breaking in Rear End

837 Views 6 Replies 5 Participants Last post by  Mstehle
Hey guys:

is there a proper procedure for breaking in a rear end? Took the existing 12 bolt peg leg with 3.55's and had it updated to posi with 3.73 to run with 1350 yoke and U joints and a drive shaft from Denny's. Is there any procedure required to break in the rear end or do I just drive it mostly normally for 50-100 miles or so then let er rip? First real drive in the car will be about 130 miles or so.

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Do not over heat it. Take it for a drive, let it cool then do it again. Is it a posi? If so, do some figure eights, and also put some off the GM posi lube in it.
1 - 1 of 7 Posts
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