My feeder house and header will engage, but will not take a load. I'm cutting in 35-40 bushel wheat and can only go 4mph. If I try to go any faster it overloads and slows down, eventually stopping all together. After kicking it in and out of gear several times it kicks in and you can definitely feel the difference and here it in the cab. Once it's in I can go and push the machine and it works great. Very frustrated though. I put on a new solenoid, the clutch isn't hot so I don't think that's a problem, but I don't know where to go next.