Ron,
The Salsbury 4HA is fitted to many British cars including Jaguar of the period ,
probably Mk VII to MkIX & Mk11
I dont have any specs on those models but the later models like Jaguar E type used a Salisbury 4HU and the torque setting for the Drive Pinion nut of the 4HU is 125ft/lb . I suggest you look for a Jaguar workshop manual or take it to a diff specialist .
Geoff
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