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.