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
The pump turns with the output shaft. Thus it is in service both 2 wheel and 4 wheel.
The pump is a lubrication pump to supply fluid to the upper section of the transfer case that is below the fluid level.
The pump is a lubrication pump to supply fluid to the upper section of the transfer case that is below the fluid level.
