Use key 23985-54 (FMC-517-955) for the transmission side and key 23985-12 (FMC-517-945) for the flywheel side. Use JIMS nut 24023-36 (FMC-978-258) on the flywheel side and JIMS nut 24023-54 (FMC-978-263) on the pinion side. Side lubrication. Replacement for 24006-58.