Why did it crash...loose pie plate or not proper lift clearance on the crown...start from scratch leveling crown lift adjustments can be setup while running up/down on inspection..car must be spotted level at a giving floor some start at the center and work there way in either direction but proper lift clearances have to be setup first by adjustment on crown first...there are several ratios on the 6850bj selector w/advancer..some are closer than others depending on the contract speed setup.some can be setup for 3/16 lift..all is effected how worn other parts are..good luck not a nice job..
