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Dumb questions

Posted: Tue Mar 21, 2017 3:26 pm
by ROBBIE
I've got a front diff that needs to go, doesn't feel lose, no play. It does four and a bit turns to one ( I'm a bit thick when it comes to ratios :oops: ) I have no idea what it's for or what it's worth, so please someone help so I can put it in the for sale section

Re: Dumb questions

Posted: Tue Mar 21, 2017 5:38 pm
by ScottieJ
For?

Re: Dumb questions

Posted: Tue Mar 21, 2017 7:52 pm
by ROBBIE
Sorry mate SJ, was in the SJ axle that was on my LJ

Re: Dumb questions

Posted: Tue Mar 21, 2017 10:56 pm
by Anton
count the number of teeth on the crownwheel and the pinion. That'll tell you what ratio you have.

Put a bit of tipex on the edge so you know where you started and get counting. It sounds like it might be a SJ413 diff (3.9:1) but it could be a sammy diff (3.7:1).

Re: Dumb questions

Posted: Wed Mar 22, 2017 9:27 am
by ScottieJ
It's a 410 axle then I would imagine, espiecially if you used the CVs for your LJ ;)

TBH 410 diffs aren't worth much, might be worth keeping as well, LJs are geared pretty low so you might decide that you want taller gearing using 410 diffs.

Re: Dumb questions

Posted: Wed Mar 22, 2017 11:42 am
by ROBBIE
Scottie that is part of what I'm trying to get, was it a 410 or 413. Once the front axle is sorted and back on, I will turn the car round and check what's in the rear, so I don't end up with odd gearing.
So the two front diffs I have are

From the LJ axle. 41 teeth, 4.5 input rotations to 1 crown wheel rotation

From the Unknown axle. 37 teeth, 4.25 to 1

Thanks for the help

Re: Dumb questions

Posted: Wed Mar 22, 2017 12:10 pm
by ScottieJ
is the diff the same size as the lj ones bolt pattern wise? if so its 410, should be 4.11:1

Re: Dumb questions

Posted: Wed Mar 22, 2017 2:20 pm
by ROBBIE
ScottieJ wrote:is the diff the same size as the lj ones bolt pattern wise? if so its 410, should be 4.11:1
Will have a look

Re: Dumb questions

Posted: Fri Mar 24, 2017 1:01 pm
by ROBBIE
ScottieJ wrote:is the diff the same size as the lj ones bolt pattern wise? if so its 410, should be 4.11:1
Doesn't fit in the axle, should SJ diffs fit into LJ axle? and the bolt spacing is different

Re: Dumb questions

Posted: Fri Mar 24, 2017 1:02 pm
by ROBBIE
sometimes I wonder how people post the same thing twice, now I have and I still don't get how. So please ignore this post, it has no meaning