Head Gasket replaced but revs

[slim]

just been out and checked again and i get 61 ish mph at 3000 and at 70 it is 3450 and at 80 it is 3800

[kitesurf_phil]

I seem to remember somone saying that there is a diff code on the diff case itself. I guess that the internals of the diff case could be changed without changing the back plate. Hmmmmmm.