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Old 04-16-2013, 04:05 PM
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4L60E Grinding, Crunching Feeling In Reverse

My buddy's 1/2 ton Chevy pickup when starting off in reverse has a grinding kind of sound. When put in drive after 25 MPH it smooths out and runs flawlessly.

Forgot to mention, I've got the drive shaft out, u-joints are fine, diff spins smoothly and hanger bearing is smooth.

Seems to be in the tranny. Just never seen this before.

Any ideas?
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