3/4" Carrier Bearing Spacer

The notorious acceleration wobble started after installing my 1.5inch Precision Racing King Springs lift kit in my 2017 Forester.

I had had the vehicle re-aligned 3 times, each alignment made it worse. I was turned away by multiple lift shops, and even replaced my CV's.

After finding ADF on forums I called Patrick who steered me right. Immediately improved the wobble by 99% and it seems to be improving as it wears in.

I also bought the anti-wobble transmission mount wedge, which I expect I will still need to install given how flimsily the transmission is held in place by the OEM transmission mount alone.

2” lift = unhappy driveshaft.
Carrier bearing spacer = happy driveshaft.

Everything lined up and bolted up nice and easy. Took the 15-20mph vibration out and set the driveline at a much better angle with the lift in!

Inputs have much better feedback and this combined with the IRONMAN lift, transmission mount insert, and rear dif inserts have eliminated any lurch and stutter around 20moh and when coming to a stop.

Noticeable reduction of wobble after installing this.
Bare minimum to no vibration exists after this + CKE insert (65D).

Vibrations don't just occur at the ramp up accelerating past 17-20mph, another vibration node exists around 68-73mph and installing this with the CKE insert eliminated that after a 2"front/2.5"rear ADF lift. the 17-20mph one was annoying to get over, but when you're cruising at 72mph you don't want to be on top of that vibration node.

Buy this + CKE insert and eliminate the harlem shuffle/ booty rumble.

100% suggest to anyone lifting their roo, no matter height/what type of lift you go with(suspension vs. spacer).