Dumb question of the day!!!

I am trying to find out the gear ratio of my escort back axel. The tag is missing hence I am counting revolutions.

I have jacked one wheel from the ground. I am then rotating the wheel 1 full revolution and counting how many times the prop shaft rotates.

Question.

Do I have to double the number of rotations of the prop shaft because only 1 wheel is rotating?

Cheers in advance,

The Baron

Yes, obviously.
If 8 wheel revs is 1 transaxle rev then the ratio is 4.
If you find a ratio of 17 or 1.9 then you missed something..
;-)

[Edited on 22/2/07 by Aloupol]

I don't think you can do it by jacking the car up because of the diff. Two ways that will work to check the ratio are:
1 Roll the car on its wheels counting the revs of wheel and prop.
2 Remove the diff housing from the axle casing and count the teeth on the crownwheel and the pinion and divide one into the other.

quote:

---

Originally posted by John Bonnett
I don't think you can do it by jacking the car up because of the diff.

---