Rich,
3600 didn't come with 4.11 in '53. You must have misread...4.11's were 1/2 tons.
What is your axle code??

I never mess around turning shafts and counting revolutions.
I just decipher the axle code or pull the cover. You've probably got a 4.57.


Steve

'49 3800
'52 3600
'57 3100