Please help JD 400G Transmission problems

[frankluke1959]

I bought this 400G last year the owner said the only fault is the transmission pressure is not good enough in reverse. But the High forward gear works but the Low gear doesn't do anything. I did disassemble the transmission and worked on the shuttle pack disk by changing all of em. Now the machine does not even drive anymore and the 1234 gear is very hard to shift its breaking the lever handle. I don't know what else to do. I like the machine and would love to have it back on the farm.

[LeonardL]

It sounds to me like you have something bound up when you reassembled the machine. Check your linkages for the shifter to make sure you don't have them crossed. That will bind the shifting as it causes them to be backwards.

If that isn't the problem then you can remove the top cover without pulling it all apart again. This allows you to maybe see what is bound up. I know this is frustrating but you may need to take it all out again. These machines shift hard even when they are okay. But you shouldn't be breaking the lever just to shift between gears.

[frankluke1959]

Thank you so much. I have plugged a pressure gauge into the trans to check the pressure. 2 things I noticed in this machine, abnormal hard shifting gears and it grinds. the trans pressure does not rise at all in the gauge it shows zero.

[LeonardL]

Run all of your adjustments exactly as the tech manual shows and then see what your machine is doing. Hopefully it is only way out of adjustment. If you do this and still have issues then it will have to be looked at deeper. Good Luck!!