Last night I put on my new strut bar to go along with my APS plenum, and I'm driving around and I notice my speedometer was at 0. After a few seconds, it popped back up to 45 or so. A few minutes later, it happened again.
Any ideas? I had to move some cables to clear the spot for the strut bar and took a few parts off that mounted those cables to the body.
I also recently had the differential replaced with the Quaife, but that was last week and the problem didn't appear until last night.