Differential Wear Query
Posted: Thu Feb 21, 2013 4:37 pm
I've obtained a spare 3.9:1 diff unit (nose only).
(Using the Osprey book "How to Restore Gearboxes and Axles" as my guide) the diff appears to be in good condition with no marks that I can see on any of the teeth.
What it has got though, is slight movement of the pinion before rotational movement is transmitted to the crown wheel.
I would estimate that at the maximum movement at the perimeter of the diff flange is perhaps 1mm before the crown wheel turns.
So my question is - is this normal?
And am I correct in thinking that a slight tightening of the pre-load will eliminate the movement by removing float at the bearings?
I make this assumption (which is probably wrong) after reading this article I found on the web:
http://bernardembden.com/xjs/diff/index.htm
It's about a Jag diff but the techniques are relevant.
(Using the Osprey book "How to Restore Gearboxes and Axles" as my guide) the diff appears to be in good condition with no marks that I can see on any of the teeth.
What it has got though, is slight movement of the pinion before rotational movement is transmitted to the crown wheel.
I would estimate that at the maximum movement at the perimeter of the diff flange is perhaps 1mm before the crown wheel turns.
So my question is - is this normal?
And am I correct in thinking that a slight tightening of the pre-load will eliminate the movement by removing float at the bearings?
I make this assumption (which is probably wrong) after reading this article I found on the web:
http://bernardembden.com/xjs/diff/index.htm
It's about a Jag diff but the techniques are relevant.