about what sort of power figures do the clutches on the 5 speeds start becoming a problem?

is the clutch there only downfall when it comes to problems?

The 5-speed gearbox is the downfall :/

how so? whats the problems with it

Some people have them on high powered cars and are happy with them, just gotta be careful the way you drive it, but others think they are s**t (like me).

I had two on mine (original from the car and brand new one) and still had issues, miss gears at times, hard to get in gears, can't handle too much of a thrashing with powerful cars, and that's with Transmax Z oil and Ripshifter fitted!

Cold mornings where the worst with them, with the original one i could only use 1st and 3rd until it warmed up a bit, was a bugger trying to get it into any other gear. Both boxes had over heating problems in summer, long drives or hard drives in heat oil would start leaking from the tailshaft seal, gearbox would start seizing up and not go into gear :\

So i moved to a T56 and couldn't be happier Such a better box, smoother and no problems with it. But that's just my experience, i'm sure there will be people out there who have not had any problems and are happy with them, just comes down to driving style i guess.