lsd ratio help

[crazymother]

I have a lsd diff with no tag (took it of to clean up and lost it )and would like to find out what ratio it is, the diff is out of the car now. is there a way of telling by turnning the input shaft ? It has 8 bolts holding the rear cover on if that helps ?

[Simon13]

that helps in telling you (i think) that it is a large case diff.

U can do the trick of turing the output shafts

mark one of the outsput shafts, then turn the input shaft round and count how many times you have to turn the input to get a full rotation of the output. get me?

easier if you tell us what car it is off? it will be either 3.91,3.73 or 3.64 probably

[crazymother]

The car is a 1987 325i but the running gear im told is 1990 sport, I have turned the input shaft 3 3/4 turns to 1 turn of the output shaft any ideas ?

[m-dtech]

could be any of these

3.91 - to one rotation
3.73
3.64
3.46

[crazymother]

Cheers mate just worked it out and it's a 3.64

[Simon13]

sounds the most likely for the car and year, rare diff and worth Ԛ£250!

[M3GTR]

The rarest is the 4.1 which was from the 318is as an option... rare as rockin horse!

[craigieeb]

sounds the most likely for the car and year, rare diff and worth Ԛ£250!

noooooooooooooooooooo

i do belive this is a 1 on ebay i was going to bid on, i asked him for the ratio and he'd lost the tag, only @ 25 quid aswell

[Stevin]

Hehe, I got me a 3.64:1 yippee