C6 has reverse but no foward

trailbronc · #1 (**permalink**) 07-09-2010, 03:54 PM

I just rebuilt the C6 in my 78 F350 with a TCI Maximizer kit. When I finished it moved around the yard fine, but then I tried to go down the road and when it should have shifted I lost all foward gears, it will still move in reverse fine. Any ideas?

TCITech1 · #2 (**permalink**) 07-12-2010, 10:06 AM

Something has happen to the forward clu pack, seal cut, our the return spring has broke.

trailbronc · #3 (**permalink**) 07-12-2010, 07:23 PM

yeah, the fwd clutch drum broke at the snap ring. Any idea what caused it?

TCITech1 · #4 (**permalink**) 07-13-2010, 09:43 AM

High line pressure will do this, make sure when you get it back together to check the line pressure. your pressure regulator valve in the valvebody may be sticking,