Question about 2003 GMC Sierra 2500HD
The tail shaft bearing has movement also the input shaft seal is leaking
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Posted on Jan 02, 2017
billbohman: Unless GMC has had some change I am not aware of and that has not been published in service manuals for the repair of these units, the procedures are the same as any seal replacement and require no special tool. There are some universal seal installation tools which I would venture the majority of techs don't have because they substitute other tools in their place most of the time. Most techs will have a special tool designed from removing seals. However, the seal can be removed without it.
Just use a little common sense when removing a seal. Don't damage the casing.
Posted on May 10, 2009
check the front axle actuator. make sure it is getting signal to actuate, but these actuators are notorious for problems. most likely the actuator is bad. it is on passenger side of differential/axle housing. plastic cylinder with wires.
Posted on Feb 16, 2010
Sudden grinding noise with no prior warning * Primarily in 2nd
gear, behavior in reverse may be abnormal; sunshell is fractured.
R&R. Try not to run or drive the car or further damage could result.
* Reaction planetary is worn out due to high miles or insufficient lubrication. Not a critical failure, but not a good sign either. R&R sooner rather than later.
* Either a torrington bearing or a planetary bearing is on its way out. Trans will eventually die a loud, catastrophic death. Cheaper to rebuild now (saves further damage to hard parts), but requires R&R. It is drivable until it breaks.
Good luck and thank you for using fixya.
Posted on Mar 17, 2010
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That sounds to me like a shaft that connects to it is out of balance. Therefore the seals are getting worn out too soon.
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