The hole in the truck housing is round- - - -the 56 car housing has an oval shape, and I'm pretty sure the axle length, spline diameter, and number of teeth is different, also. Passenger car axle flanges have 5 lug studs- - - -trucks have 6.
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!