Originally Posted by forddieseldoctor
Most clutches that I've had slip will slip under high load and high rpms in a lower gear like going up an on ramp.
Thats true too, if you think about it though thats when the most torque is put to the clutch in the lower gears, when they are in the upper rpms.
If you notice with a clutch thats starting to slip, it will always start to slip a little lower in the rpm band range as you shift up through the gears.. It may not slip at all in 1st or 2nd, but say it slips at 3k in 3rd, then it will most likely slip at 2700 in 4th, and right at crusing rpm in od. It being an overdrive gear also puts a lot more torque on the clutch.
As the clutch starts to wear, you will notice it in lower gears. If its slipping in 1st or 2nd it will be pretty much useless in higher gears.
I know this sounds the exact opposite than what you'd expect to hear, I used to think the same way and it took me forever to realize the way it really happens. Everyone automatically thinks the most torque is being put through the clutch at really low rpms as you've got your foot to the floor but thats not the case.