Want this question answered?
your torque converter has locked up.... it's like having a manual transmission with no clutch.
Any clutch that is 'pushed in' is basically disengaged. When you push in the pedal, the two plates that compose the clutch assembly are separated from each other. If you have grinding when these parts are pressed together but hear nothing when they are apart, the problem should seem obvious. The plates are no longer working as they should and probably need replacement. One other possibility is that the clutch is operating normally and some other part of the drivetrain is damaged. The effect of this would be similar and would only be present when the clutch is engaged. In any case, an inspection is necessary to further diagnose the problem.
Because you have to have the clutch depressed to start it. They came factory with a clutch safety switch that will not allow the engine to start unless the clutch pedal is pressed to the floor . NOT. the clutch safety switch only allows the starter to be energized... If the glow plugs will cycle then the truck can be pulled to start. When my starter solenoid was bad I pulled it to start.
If a truck has a clutch brake it would only be used when coming to a complete stop. By pushing the clutch peddle completely to the floor you would apply the clutch brake. This stops the clutch disc from spinning making it easier to shift into 1st or reverse gear. Normal shifting while driving you would not need to or want to push the clutch peddle to the floor to activate the clutch brake.
No. It would only prevent you from starting.
No, main bearing noise is a rumble Throw out/release bearing for the clutch will only be heard when the clutch pedal is depressed. If you hear the noise without the clutch pedal being depressed, it is most likely the gearbox first motion shaft bearing that is at fault. First motion shaft bearing noise usually goes away when the clutch pedal is pressed.
bad booster pump or air in brake lines
its not legal but it would be weird
Possibly the fuel actuator. Its about $150 from cummins. The only way to be sure is with an electronic scan tool & monitor the actual vs. commanded fuel pressure.
If it is a manual transmission I would suspect you have clutch problems. Possibly gear lube or hydraulic clutch fluid has leaked onto the clutch surface. The only repair is to replace the clutch and repair the leak. When you let the clutch out this causes the clutch to chatter thus causing the shaking.
I dont have the answer, but my 92 does the same thing
No, only if you reduce the speed so much that the engine can't keep running in the current gear.If you brake hard, you would clutch.