Hello fordbarn,
My 53 Ford has a noise rear end due to the crush sleeve being gone and the pinion moving around. I'm taking the car in a longer distance drive so decided to address the issue. I removed the axles and 3rd member, car had a 3.90 gear set. I also discovered a twisted axle shaft.
I have a spare rear end I pulled from a 1954 Ford. I tore it apart and was delighted to see 3.78 gears. Upon closer inspection I discovered the 53 axles are 17 spline, but the 54's are 28 spline. The axles, bearings and seal surface all measure the same, but why the different spline count?
Thanks, Chris