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Working on front end and had alignment. Was told prior that truck crabs down the road. Shop said rear axle just out of spec. ..27 right rear. -.27 left rear.
What direction and how far do I need to shift rear axle to get it closer to 0 0
Ie left wheel back. Right wheel forward or vs versa
But the time to do that would have been while it was on the rack. With air tools it would have been about a 15 minute job assuming the u-bolts aren't completely rusted. You now have no way of measuring the changes you make, and there is only a small amount of adjustment available.
You will also affect the steering wheel aligment when you adjust the rear, so that will need to be tweaked again.