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...
Forum Discussion
My 2002 2500HD/8.1/Alison had pump rub...rubbed a hole right through the magnesium case. The hole was there for 2-3 years and I finally checked the fluid. It was bone dry of course. Put a little JB weld on the hole and refilled. It works fine to this day. 240,000 mile still going strong. Is it really that big of an issue?
