27-11-2019, 01:38 PM
Mark a rear tyre where it touches the ground. Push the car through one complete rotation of the wheel while counting how many times, and fractions, the propshaft rotates. The U/J is easiest.
If it's just under 5, you have a 4.9
Most common, 5 1/4 times for a 5.25. Just a bit less for a 5.125. Etc., etc.
If it's just under 5, you have a 4.9
Most common, 5 1/4 times for a 5.25. Just a bit less for a 5.125. Etc., etc.