Tell me it's the clutch ?

I have a 2001 rubi, tore down last winter fixed the hondamatic, replaced the oil pump, after it warms up I hear a grinding/slipping noise when I'm

A.climbing ditches,
B. gun it from a dead stop
C. power brake (hold down all brakes a hit the gas).

I was looking for some input assuming that my oil pressure and oil level is good.

Thanks


* one other thought if I'm power braking and still hear the nosie does that rule out the hondamatic the noise actually sounds like its coming from the front output shaft.