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So I am finally there on the rear axle. All finished and back on her wheels.
There were a few "cosmetic" items to sort.
First was the air feed for the ARB locker. The old feed had been damaged when the axle parted company from the car in 2011 (see It all goes wrong).
I had previously fitted the new parts for the feed to the diff (see Fitting the rear wheel bearings)
If you look around the internet, there is a lot of advice and conversation around castor correction for the front radius arms following a spring lift. However there is a lot less discussed about rear axle correction. Clearly "castor correction" does not apply to the rear but there is still an adverse effect due to a spring lift. There are two main effects, the nose of the differential is at the wrong angle which increases the angles the propshaft has to cope with and the spring mounts are not aligned top and bottom resulting in "banana" springs.
The key to a good suspension set up is balance and stability. Over stretching in any direction achieves very little. Ok so the vehicle may seem to have amazing "articulation" but if the tyres are not generating traction (ie pressing on the ground) it does not matter how far they have stretched to touch the ground. Bump stops are a way of protecting the suspension from over compression on one side and the tyres from rubbing inside the wheel arch. Therefore, with a new set of springs and shock I also have gone for bump stop extensions