While driving last night, my 60 developed a sudden pull to the left when braking--if I took my hands off the wheel, it would go almost a quarter turn to the left when hitting the brakes. The odd thing is, there were NO problems until last night---right after I had the truck on a lift and we had jacked up the rear axle and messed with the rear drive shaft. Pads look good, fluid looks good, doesn't look like we crimped any brake lines while working on the truck. There is a *slight* possibility I got some rust converter on the right front disk (but I really, really doubt I did)--if my right disk brake was slipping, would it make it pull to the left? Is it possible that all the "ups and downs" with the suspension freed up one of my front shackles while the other remains frozen, causing it to react funny to the weight shift of braking? What are the factors that would make it pull to the left???? ???