Forward or reverse will not engage - cluthch problem?

drive belt -worn loose popped off or damaged ---forward / reverse linkage damaged or disconnected --transport lever engaged --wheel keyway missing ---trans axle pulley damaged --trans axle damaged

model number would be VERY helpful here because craftsman made many different styles/models throughout the years

Make sure the 4wd shifter is in correct position and hasn't slipped out of correct spot to get you moving forward.

Well if you have 60 psi at idle then the pump seems to be working. If it holds in park then the axles are not stripped or broken.The input splines in the torque converter could be stripped. Forward and reverse share a set of cluthches and a sprag , you could have a problem in that area.I would guess that the seal is blown on the input clutch piston.

check on your reverse solenoid if its actuating if it is then your reverse cluthches are wornout

sounds like the by pass rod has been pulled out

Try lubing the linkage where it shifts from forward and to reverse the linkage is most likely freezing up or has snow or ice build up causing it not to shift, My thought is your shoving it hard enough that it finally engages when you get the snow or ice to break off.

Was fluid and filter changed to fix this,?????????? or did it happen right after this was done??????????. you are not clear.

Did you try to disengage the safety feature that should shut the tractor off when the blades are engaged and the tractor is placed in reverse? I believe that it is located under the shift leaver

Forward drive in the C6 requires both the forward clutch AND the low/reverse, one-way clutch, or intermedaite band to engage. Since you have reverse but no forward, the forward clutch is most likely the problem, since it is needed only for forward speeds and does not affect reverse. Sounds like a trans rebuild.