I'd suggest putting fresh lube in the rear axle- - - -not just checking the level. If there's water in it, it will be on the bottom, and the axle will appear to be overfilled with lube. Pull the driveshaft and loosen the brakes, as suggested above.
Jerry


"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!