I have a driveline vibration that I've narrowed down to the output shaft/slip yoke. I eliminated the rest of the driveline as the problem by disconnecting the driveshaft and running the tranny with just the slip yoke installed. With the entire driveline disconnected except for the slip yoke, there is a vibration at 30-35 MPH and 60-65 MPH (exactly like the vibration when the truck is going down the road). At first, I thought it was due to a worn extension housing bushing because I could move the slip yoke side to side in the extension housing. I installed a new bushing, but the slip yoke still has about the same amount of side to side movement. While I had the extension housing removed, I noticed the tailshaft of the transmission also moves side to side which doesn't seem right.
Does anyone know if side to side movement of the output shaft is normal or if there is a runout spec that I can compare to? Any help is greatly appreciated!
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4R70W Output Shaft Moves Side to Side?
Linear Mode
