The starter does try to engage but the drive gear will not match up with the flywheel. I removed the solenoid and engaged the drive gear with the flywheel and it went right in. Then I turned the flywheel with the drive gear engaged, this is when it got bound up and wouldn't turn. This tells me the gear ratio is wrong between starter drive and ring gear. GM might have made two different starter drive gears or someone might have changer the flywheel causing the problem. Still checking on a solution, all sugestions appreciated, Thanks, Ralph