1995 F-150, 4wd. 4.9, 5speed overdrive. My dad had the truck, thought the starter went so replaced it. It didn't work so thought the starter was no good, got a replacement put it on still wouldn't work. I have the truck now and I have replaced the flywheel ring, and got a 3rd starter and it still won't work. I turns the engine over but is really noisy, grinding sound. I don't want to keep trying though and screw something up again. Any ideas?