Originally Posted by
JimmyMac
The problem is that the pulls to the left even though it's dead straight on a setup station. Shimming it differently does level out the ride height so that it doesn't do that anymore. I just don't like that fix. Maybe OCD. I dunno, but there are plenty of other bulkheads out there that I can try to "fix" this problem. Either way, the new RR12 did pretty good this weekend. Took home my first win with it.
While the arms could be a problem...I would look at other things as well. One of the most over looked cause for pulling left is the rear axle. If the left side hub is too tight the bearings the axle rides in will cause the diff to be slower on that side than the other since both axle bearings are on the left side of the diff. You need to make sure there is some slight play in the rear axle and that the bearings spin freely.