not sure I’d be indiscriminately replacing parts without first diagnosing the root cause. Sounds like an expensive way to possibly and eventually getting to the issue.
As many of the membership has suggested and in an order that suits my economic thinking
1. Tires
2. Bearings
3. Brakes
4. Seals
5. Driveline.
As another good member suggests, sometimes whar you swear is a sound in the rear is actually sourced elsewhere. So I would check all four corners.

Best of luck. Guy Pensa
Cars with Personalities
Getting itchy. What's next?
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2007 XKR (Jaguar Racing Green) (woo hoo!)
2004 XJR (Jaguar Racing Green) (deceased)
2002 S-Type R (British Racing Green, of course)
1951 Riley RMD (Black, time for that restoration)