On the CCKW, the rears are packed with grease and there is a seal to keep the
90 weight gear oil (GO) out of them.
The CCKW uses the same wheel bearings as the civilian Chevrolet that does NOT
have the extra seal to keep the GO out. My 1946 Chevrolet has gear oil in the
wheel bearings. If the truck tips too much to one side the GO will wind up
there. The grease is easier to seal then the GO, but for lube, at least on the
CCKW's and WW2 Chevrolets the GO is just fine unless you plan to use it as a
DUKW... and do water.
Steve in NH
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