Possibe internal trans issue? Have you checked driveshaft/joints?
May, 30, 2012 AT 9:24 PM
Yes driveshaft/ joints checked out fine
May, 30, 2012 AT 11:13 PM
Did this happen gradual or sudden?
May, 30, 2012 AT 11:19 PM
July, 24, 2012 AT 4:13 AM
Drain the fluid and check it for bits and pieces.
It could be either bent shifter components or worn gears or chewed up gears. If I recall correctly, that tranny has a side inspection plate that you can remove and take look inside with a flashlight. You should be able to see worn or damaged gears.