Any help please

[E30_CAB]

Hi there trying to find out what ratio my diff is the numbers i have got off the old diff are

BM017

OR

4K6Q8165BMW

Thank you

[sihooker]

Look for a metal tab bolted to the case. The ratio, and whether it's an LSD, will be stamped on it.
It'll probably be hard to read until it's been cleaned up.

[E30_CAB]

Cant see nothing like that been under the car a few times


Any one know what the ratio would be for 1988 325i automatic

[daimlerman]

Ratio should be one of these;
3.64
3.73
3.91
Lift both back wheels clear of the ground and support properly.
Turn the propshaft one complete turn and see how many turns the wheels make.
Divide one into the other.

[bss325i]

Any one know what the ratio would be for 1988 325i automatic

Should be a 3.73 if its never been swapped for another.