Flat towing

My 2000 is modified with a 5.5 inch tnt long arm kit, 33x12.50 mtr's, etc. While towing with a tow bar and turning right the wheels will turn to the left and leave many dollars worth of rubber on the road. When I turn right it seems to follow ok. I checked my alignment and it seems close enough. This happened at slow speeds while testing it out in my neighborhood. Im using a 4 1/2 inch rise ball mount and the tow bar is sitting level. Anyone had this problem? Thanks

Make sure your pinion angle is right on the front. If the arms are adjustable you can adjust the castor angle by rotating the axle.

OK The tnt instructions say to set the differential cover at 9 degrees for the hp 30. 9 at the cover is supposed to equal 6 or 6.5 on the caster. Im taking a few measurements to be sure everything is ok from front to back. Thanks for your help, I will try to check the caster on the ball joint or something to see if its close.