Macster

Generally if the clutch slips the clutch is starting to go bad. I've never done the test you describe with my Turbo. I have given the engine full throttle at various engine speeds in all the 6 gears and the engine rpms and vehicle speed stay locked together so I know the clutch doesn't slip.

Now I seem to remember -- the memory is fading -- that there can be a motor mount/transmission mount problem that under some conditions (hard acceleration in the higher gears) that mimics either wheel spin (improbable given the physics of the situation) or clutch slippage. It is clutch slippage due to twisting of the engine/drive train that somehow partially releases the clutch and causes the clutch to slip under this load.

I'd be sure the engine and drivetrain mounts are in good condition.

If they are and the clutch still exhibits slippage if you can't avoid driving the car in such a way to avoid this then the clutch should be renewed. You do not want to slip the clutch so much it overheats the flywheel and possibly renders it unusable with the new clutch hardware.

Sincerely,

Macster.