Re: Fill plug location.
My guess is, at some time, the rear oil got low. It wouldn't take much to starve the bearings.
I always pack my bearings with grease anyway. It works in the front. Eventually the gear oil will wash it away but at least the bearings are protected on the initial roll.
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My Classics:
'72 K20 Suburban + '65 Dodge Town Wagon
'72 Corvette Roadster +'67 Corvette Roadster
'73 Z-28 Camaro
'63 Ford SWB Uni Pickup
'50 Ford Coupe
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