Sorry if this has been asked guys I have searched around.
I have I believe a Late 99 F550 4x4 zf6
Chassis truck. I have 2 problems
1. While the truck is running in neutral there is a knocking noise coming ffrom the trans that goes away when the clutch pedal is depressed, once you release the pedal the noise comes right back.
2. This happens only while driving making it hard for me to diag, but while driving my truck if I hit a rough patch of road (i.e. bumps, pot holes ect.) then go to push the clutch in, the pedal gets extremely hard and I am unable to depress it, after a few quick stabs it functions normally again.
I don't know if these problems are related or not but I am hoping someone can point me in the right direction.