GM Pump Rub in Transfer Case
GM transfer cases 261 and 263 are prone to a condition known as Pump Rub. It is where the pump used to circulate the fluid in the transfer case wiggles back and forth wearing a hole in the transfer c...
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You can find aftermarket rear transfer cases here
www.transfercases.com. In Oakland, CA
They come with all the gaskets needed. These cases are built with harder aluminum so you don't need the adapter kits.
Pump rub was news to me until I noticed some case oil dripping. The "pump" is held by clips that eventually break then the pump rubs on the soft transfer case wall and wears a hole. This is not a "might happen" thing it is a "when will it happen" thing. Damage occurs when you loose enough fluid to damage the unit. Since the hole is usually above the fluid line it only leaks when operating so you don't get a big puddle when you park. I would suggest getting getting it done now or inspect the case regularly for any fluid on the outside of the rear case.
www.transfercases.com. In Oakland, CA
They come with all the gaskets needed. These cases are built with harder aluminum so you don't need the adapter kits.
Pump rub was news to me until I noticed some case oil dripping. The "pump" is held by clips that eventually break then the pump rubs on the soft transfer case wall and wears a hole. This is not a "might happen" thing it is a "when will it happen" thing. Damage occurs when you loose enough fluid to damage the unit. Since the hole is usually above the fluid line it only leaks when operating so you don't get a big puddle when you park. I would suggest getting getting it done now or inspect the case regularly for any fluid on the outside of the rear case.
