I have a 96 F 350 crew cab. I have had the truck for over 20 years. It has a ZF 6 Super Duty tranny. I was in 4 low recently due to a heavy load and the starter just randomly engaged. Most of the time it would shut off after a few seconds. Some times it would keep running until I shut the truck off. Whats weird is that it seems to only do it in 4 low and with the wheels turned all the way to the right. I had a brand DB electrical starter in the box and I put that in. I still have the same problem. I am really worried about doing damage to the fly wheel. Thanks for the help.