Rear diff alignment

[skoller]

I am about to have the complete rear diff on my Puma replaced under warrenty.I have had the centre replaced 3 times so now the whole diff will be done.Should a rear diff or rear wheel alignment be done also because I have had steering issues with it too(heading to left).
Steering box and arm have been adjusted,wheel alignments done and a different front spring was put in the drivers side (white white) original was yellow yellow but it still heads to the left.Maybe there is a difference in the wheelbase measurements.

[JDNSW]

There are no adjustments in the rear suspension (well, weren't in the older ones, I'd be very surprised if there were in the new ones), but a check of rear alignment might show up any ongoing problem relating to an out of tolerance or incorrectly assembled part - although it is difficult to think of what could be out. Sideways position of the axle is set by the A-frame and its mounts, and angle by the lower links and their mounts. No adjustments anywhere.

John

[stig0000]

why is the hole housing been replaced?, and why have them centers been replaced,

[skoller]

The diffs have been very noisy and L/R have been replacing the centres to eliminate the noise by installing reworked bits,but it has not worked.I was told they have a different supplier or manufacturer now.After 3 centre changes and ready for another in 26000k ,they said change all of it.
I hope it works.The noise gets a bit tiresome on a trip.