what ratio is my diff

[retrotoe]

bought colne back axle for my escort big gear is planet one got 35 and poin got 11 whats ratio cant work it out,

[1980escort]

I'm not being cheeky but have you counted the teeth correctly? I did that and thought i has a 3.5 diff instead of a 3.89

Sent from my GT-I9505 using proboards

[ettorebugatti]

35/11=3.18

[retrotoe]

counted them correct so must be 3.18 diff

[jrevillug]

A ratio is just the proportion of one number to another. Say 11:3, or 375:17. To simplify it, you can divide both numbers by the smaller of the two, giving you a "to-one" ratio:

17 / 17 = 1
375 / 17 = 22.0588235

So that ratio of 375:17 can be simplified to 22.06:1.

The same works with diff ratios: just divide the larger number of teeth by the smaller number of teeth to get the ratio-to-one: if you have 39 on the CROWNwheel and 11 on the pinion, the ratio is 39:11 = 3.545454545:1. Due to laziness, most people leave off the 'to one' from diff ratios, and don't bother with anything past the first couple of decimal places, meaning a 39:11 diff is referred to as a 3.54.

So yes, your diff is 35/11 = 3.18.