Looking for a refurbished Differential (LSD)

[Bryan_N]

@swallow_che

The chance is a just Loosen Pinion Bearing Preload.
is there easy way to just fix this?

Do a search in the XJ40 / Modern archives. There are many (sometimes ‘heated’!) posts on the subject of “pinion bearing pre-load”

Here is one of my posts as a sample -

[xj40] Re:diff whine

In reply to a message from tomsprechs@yahoo.com sent Tue 11 Feb 2003: Jerry, On an XJ40, there is not a torque figure specified for the pinion nut itself in the Tech Specs. The pinion bearing pre-load is set using the crush tube method by measuring the BACKLASH torque ( i.e. the torque required to take up the play between the crown wheel and pinion) and that is measured only in lb/INCHES (Spec = 35 - 55 lb/inch). It’s a ‘one-shot’ type excercise because if you tighten the pinion nut a f…