Question about 2000 GMC New Sierra 1500

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Rear locking diff losing fluids no signs of leaks

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Pull both tires off and see if its coming out at the cyls.
behind the drums or rotors

Posted on Jan 31, 2010


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My rear diff housing is leaking quite badly. is it possible the pinion seal is the problem

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Hi, you are right the rear is for the rear,the best thing is to pull both rear wheels off and remove drums that way you are looking at the wheel cylinder and then you will know if that is your problem,some times when they leak you cant see it with out pulling drums off. If no problem there check around master cylinder for leaks and around brake booster inside truck. Then if you still have no sign of fluid take the two nuts off master cylinder and see if leak is in side booster is wet.
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98 land rover discovery

Most likely, you need another rear diff. to be sure, the old part will need to be removed and inspected for damage. Sounds like some metal or a bearing got ruined from lack of lubrication, like a chipped tooth or a binding bearing. Make sure the rear driveshaft u-joints are OK. while you're at it. Have the Discovery put on a rack with the rear axle lifted, so the rear wheels can be spun by hand to listen to the rear diff. Sorry about your troubles

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It should be that easy if the leak is from the gasket. If it from the seal, you will have to remove the drive shaft from the differential and remove the seal and put in a new one. Either way, the repair is fairly easy.

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