Hmm.....did not think you needed to on any of them. If you turn the engine by hand you will find two slots in the flywheel that allow you to get a long thin torx bit (I used a long torx type L shaped key) between the sump and the bell housing onto the two bolts that are otherwise hidden by the bell housing. It certainly works with the M32, F40 and C635 boxes they often come with. Mine has the F40.