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Have a 93 f-150 straight 6
Problem was starter just clicked with key or jumping the
fender solenoid. Have replaced pos/neg cables, starter, fender solenoid, battery. Still same slicking. sounds like the gear is hitting the flexplate and not engaging. If i pull the starter out part of the way from the flexplate with the wires hooked up it works fine. The shimes availible for this starter just moves it out from the flexplate not down away from it. Any ideas???
Thanks
Assuming you have the correct starter I would check the condition of the gear teeth on both the starter pinion gear and the ring gear. One or both may be mashed. If all that is OK then I would look at the starter. It may not be rotating slowly as it engages and so the teeth can`t mesh. Just my thoughts.
I may be wrong but I believe the main power to turn the starter(not the solenoid) grounds through the block to the frame. When this happened to my 5.0L, I finally discovered that the little braided grounding strap from the block to the frame was hanging on by a few strands. I replace it with an insulated wire of sufficient gauge(I forget now) and haven't had a problem since.