If the manual is a development of the M56/M59 then they're very tough units, tune them sufficiently and you can break 3rd gear off it's shaft but with stock power that's not going to happen. The autos I don't know much about - for the period of car I knew, the autos were crap so no one used them.
If the manual is a development of the M56/M59 then they're very tough units, tune them sufficiently and you can break 3rd gear off it's shaft but with stock power that's not going to happen. The autos I don't know much about - for the period of car I knew, the autos were crap so no one used them.