Excaliber I would make a call to ERA and talk to Doug on the rear end. He sets up the cars. As far as thrust angle, it is the angle in which the rear wheels push the car forward. If the car is square, the angle will be 0. There is pininion angle that can be changed which will change the caster angle sort of. I would tell you to get a Jaquar service manual to check all the clearances in that rear before you start pulling it apart. I have a little play in both rear hub assemblys with no problem of tork steer. Your ERA has bushing on the lower arm front radial rods to the frame, they may need to be replaced. If one is worn the car will do what you are saying. Ernie do the basics before you pull that rear apart. Just for kicks have you greased all the fitting in the rear?? Put some heavy grease in the hub carrier bearings on the bottom and road test. It's a quick check for playin the hub bearings. Ernie I don't see how a loose stub shaft can cause a tork pull. A banging noise in the suspension would be the noise or grinding, I broke a stub shaft bearing after 8 miles, brand new at Run&Gun. Sounds like a bag of marbles grinding up. Hope this helps. You need a set of chassic ears to help find the problem. it's something simple
Rick Lake