The bolt on the side cover does nothing to tighten up the box, its just a stop to keep the pin located in the scroll gear. Mic the pin at diff points, might have a flat spot and you can press the pin out and rotate it. but also mic the scroll. biggest killer is staticly turning the steering (while not in motion) HUGE loads that move metal. always assist by turning the front tires. Strange boxes are similar, but don't think they want to work on them. I think M/W still has some service parts for the SPE boxes