Is it right that a starter never need to shim on a Buick engine like my '70 GS350? My last starter made a little noise for some years but the noise became stronger with slipping teeth. Then I disconnect the big wire plug under the steering column for to repair the inner part of the steering column (sector gear). After that it was the end for the starter because he totally slipt over the teeth. I thought that I need to the replace starter. The teeth of the old starter and of the engine looked good when I inspected, but I suspected the solenoid of the starter. After replacing a new starter, he started almost good for two times but sadly soon the noise of the slipping teeth became enormous. Do I need to shim the starter or should the positive wires of the battery be bad? I tested the negative wire already by connecting directly from the battery to the outside of the starter. The positive wire connected to the starter are difficult to reach for to test. At the same time the blinking of turn lights are going too fast after repairing the steering column. Does have anyone experience with slipping starter through bad positive wires (also to the solenoid) or should I to shim the starter? I have read that starters never need to shim on Buick motors.