So I pulled the K member on my '91 to replace the oil pan and clean up a few things while I had it all apart. I figured while I had it apart I would go ahead and replace my starter with the newer style mini starter. I bought a Bosch SR7542N from Rock Auto for a '93 Mustang. The problem is that it will not engage the flywheel. The starter just free spins. Has anyone had this issue before? Everything I read said this swap is plug and play. My car is a manual and has a factory replacement flywheel that's been on the car about for about 5000 miles. Any ideas? Maybe I got a defective starter?