Well, never messed with the AOD's so I don't know about those, but I've had many C-4's and C-6's and never had a problem with them not hooked up, as long as the linkage is retracted it don't affect anything, but if the linkage should move and not be all the way retracted then it could be partially in shift mode between 2-3, then you wouldn't have full apply pressure to 3rd gear and would cause slippage.