Question about 1990 GMC Suburban
Vibration while accelerating - especially if towing. U-joints appear good-no play, nice and tight. However, there is a lot of play where the yoke comes out the tailshaft (the "cone" with the 4 bolts at the back of the tranny). There's also a leak on the front side of the tailshaft. Is the "tailshaft" rebuildable? Are there bearings inside as well? It has been over 15 years since I've messed with a trans. Could definitely use some advice. Thanks, Earl.
I would check the rear trans mount at the rear of the trans first. Put a pry bar between the trans and the big metal cross member and see if the rubber of the mount separates from the metal. Replace if necessary. The extension housing usually has a bushing inside as you suspected. They do wear out. It rides against the slip yoke of the driveshaft. If the rear trans seal is leaking that usually indicates a worn bushing inside the housing. It's not that hard to replace on most vehicles. Replace the bushing and seal. Replace the gasket between the trans housing and extension housing. Make sure the slip yoke on the driveshaft is not worn out or that will need to be replaced too.
Posted on Feb 05, 2009
Yes you can rebuild the tailshaft and there are bearings inside of is. Does the yoke seem to be smooth looking meaning no major marks?
Posted on Feb 05, 2009
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Posted on Jan 02, 2017
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