Raising rear subframe

[alistairolsen]

Hi,

I've seen some mention of raising the rear subframe, as well as a few products to support this, but no detail account of whats involved.

I assume the replacement front bushes have different lip thickness which raises the front end and then one needs to slot the diff mounting on the rear?

Thanks

[HerbE30]

https://www.condorspeedshop.com/products/solid-rear-12mm-riser-subframe-bushings-uhmw?variant=236082707

This is what I used. The material from the bushing is moved so that the subframe can tuck closer in. The kit includes the spaces and hardware. I have the spacers and hardware if you go a different route though.

[88BlackS-ETA]

I used revshift.

http://www.revshift.com/product-p/psb-e30.htm

Remember, when you raise the rear subframe 12mm, you should drop the differential 12mm to keep the drive shaft to pinion angle the same as factory. There is a option to include the kit for a little extra.

This is the kit, separate from the bushings.
http://www.revshift.com/product-p/dss-12.htm

[alistairolsen]

I was going to slot the rear diff mount to raise the rear of the diff to keep the pinion angle the same, or is there not enough clearance?

Otherwise I can see why dropping the front would be worthwhile.

Thanks for the replies.

[wworm]

you need to lower the diff, not raise it. The spacers are required to space the diff down off the subframe to keep it in the same spot as before. Slotting the diff bushing will just allow you to bolt the diff directly to the subframe (without spacers) which will put your driveline at a different angle than factory