hello is this clutch or gearbox diff clutch props slips in third somtimes but not all the time but fine in first and second when pushing hard ??????

 

If you mean third slips out of gear ie slips into neutral then the box is in trouble.
If you mean the engine revs rise while in third and road speed does not, then the clutch is in trouble.

I think the prop is innocent!

911

 

cheers lol no i did mean slips