As part of my restoration on my '62 Mk2 I’ve lowered the front suspension by adding spacers to the spring pan. Pretty straightforward. I’ve had concerns about getting the rear suspension lowered to match as there are limited options for how to achieve this. I’ve come up with an idea that will allow adjustment of the height of the rear axle relative to the spring mount…details below. There is likely a compromise here as by doing so it’s altering the geometry between the control arms, the axle, and where the spring mounts. I’ve mocked up how these all relate with some cardboard cutouts.
I’ve yet to cut the spring mount on the axle, but am nearing the point where I’ll do this as I have most of the parts ready.
Concept: where the spring mounts to the bracket on the axle, add a slot for the bolt holding the spring to raise and lower. Lowering the bolt/spring mount from current position will lower the car.
Drawing of the concept: Gray area is metal bracketry that will be grafted onto bracket on axle
Stock spring mount bracket. This will be cut around where the blue tape is.
Jig built to enable precise relocation of current mount point. After I cut off the existing mount I’ll position the new mount here to ensure proper orientation
The new bracket with slotted hole for spring mount. This will be grafted onto the bracket on the axle replacing the current hole/mount point. The threaded rod ends will go through a plate with nuts on each allowing precise adjustment.
My suspension components/geometry mockup in cardboard. Don’t have this fully sorted yet, but trying to understand the relationship between the spring mount and the axle and control arm. It’s clear that the Mk2 leaf spring extends out as it compresses, which makes the spring mount point move in a C arc (a very relaxed C). The control arm moves in an arc in the opposite direction (backwards C). This assuming the axle remains in a constant fore/aft orientation and is allowed to move vertically only. At this point I believe the slot for the