Thread: Rear main vs tranny input seal leak
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Old 03-20-2015, 08:19 PM
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Not sure on Windsor but Cleveland 351 cranks are known for the crank rear flange to become 6 sided from the flywheel bolts flexing under heavy load.

A mate of mine found this out the hard way, similar to yours.

The rear main seal cannot stay on the crank if it is not round.
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