How to tell which Diff Ratio.

[Cyclamin]

Hi,
Is there any way you can tell which diff ratio you have ?? Other than driving the car and watching the taco against your speed??
Cheers

[mr.jones]

The ratio should be stamped on the flange next to the yoke, you may need to hit it with a wire brush. Or the age old spin the tyre whilst counting the turns on the yoke.

[Valencia]

What diff what car

--- Updated ---

would help

[Cyclamin]

Cars a 1983 WB , 253 , 4 speed - Diff Salsbury , Ratio ??.??

[Valencia]

There should be acode on the id tag under engine bay but i would say it could be 3.08 maybe

[Dick61]

ID tag on left side of scuttle panel should list the code, probably 3.36:1 or 3.55:1 with a 253 and M21. 3.08:1 would be a pig to drive and burn out clutches, 1st gear combination would be too high.

[HK1837]

Yes, 3.36 or 3.55. HQ-HJ 253 M20 came standard with 3.08, HX-HZ got 3.55 which changed to 3.36 later. WB should be the same as late HZ.