I am having the most outrageous starting issues. has 2.9 and v6. I've replaced every component of the starting system, solenoid, battery, cables to and from the starter and the starter itself. I've sanded and cleaned all the connections. Bought 3 lifetime replacement starters and inspected the flywheel. Even ran a starter cable to the mounting bolt of the starter to make the ground better. When it fails, you can hear the starter turn but the bendix does not engage. When it does this I'll leave it sit for a couple hours and it will start. The starters test ok at the shops after they fail so it's still going back to connections but idk. it'll start no problem the first 20 times after i replace the starter, than the bendix stops engaging.