is there an adjustment to stop the clutch slipping while going up hill in 3rd or 4th (1980 hj45) or is it time for a new clutch. if i was to replace the clutch, my idea was get a couple of floor jacks,undo all the bolts, lower the gearbox and transfer with them, change out the clutch put the new clutch in in the reverse order, and bolt it back together. any holes in that theory? any special tools? would it be much harder to redo the rear main seal while i'm in there? is there anything i need to do to the flywheel? do i need to undo linkages or will they drop through the holes in the floor no prob? do i need to detatch park brake cables and speedo cables? clutch hydrolic lines?