Did you resolve the issue? My 3215HST is have similair issue. Reverse is fine. Forward is half speed. I can stand on pedal and make it go(sort of normal speed). Checked linkages and I can't find a problem.lubed zerts.
Its working but not normally.
I will be checking out an '08' 3215 HST w/FEL 111 tomorrow, 255 hours on the meter, looks good....but,
what do i need to be checking mechanical wise before buying?