Clutch slip

[andrew34ruby]

Just add to the mix, my GE Cup does the same sort of thing on hills in top but when I change down, it is fine (only slower!). I think this definitely clutch slip but why should it be fine in lower gears?

The torque to make the clutch slip is always less in lower gears. Torque multiplied by revs equals power. so in lower gears you get the power to push the car along with less torque and more revs. Higher gear means less revs, so needs more torque to push the car along. More torque makes the clutch slip.