Re: UMI Adjustable Rear Uppers
It’s pretty easy to figure out with a little trial and error.
What I did was put a little mark on each turnbuckle so I had a reference point. Then I simply loosened up the lock nuts and started turning keeping track of how many turns I made. I then checked to see if it got longer or shorter. That told me which way to turn it. I then put them back to where I started.
For me, I didn’t actually care much which way was in or out though, because I was adjusting the pinion angle with them, and turned each side equally watching the pinion angle move the direction I wanted, and if it went the wrong way, I turned them the other way.
After I was done, I checked rear end for center again, and it was.
1972 Chevelle, 454, 200-4r non-lockup, 12 bolt 3.73
1981 Camaro Z28, 355, TH350, 3.73