Driveline jumps when trying to engage the clutch at low speeds

YOU are the problem.

When tractor noses down, bucks on you or hops with a bad case of the bouncy. YOU are the problem.

Find a gear sufficient to move out. Engage clutch just enough to get it all the way out completely engaged, then apply power. With no foot on that clutch.

You don't ride a clutch on a semi truck.

 

Well.. Reverse is the same as first gear in most any situation. If Dead Idle backwards is too fast, then I have to expand my question to ask you what are you doing backing up? Are you trying to make a dump near a pile at say a ready mix? Why not just plop your pile where it is and let the front end loader move it up?

That is actually what I tell my stone haulers to do. They plop it right there and I'll move the pile onto the main pile soon enough. It dont but take a few scoops with my front end loader.

I cannot think of any other possible situation, but I would nicely ask for a description of what you are trying to do with that particular backing?

I have a few more thoughts but without understanding your situation I don't want to come off as stupid or idiotic any more than I am already.

 

What is your transmission model and have you checked bushings on all off the powertrain?

 

Ok if it is a bad clutch you will shake going down the highway getting there. Since you said it only did that backing up then it's not the clutch. Unless it is YOU trying to ride it halfway. It starts to bounce, you start bouncing on the clutch and it becomes a endless circle. Follow me?

If there was something really wrong with the shaft while backing or moving forward at low speeds, you would have been shaken to peices going again, down the highway to the customer with the backhoe. If a shaft acted up that much at that slow of speed you would be hopping out and looking under there to see what the clattering and clanking was all about.

Are you in a automatic truck by any chance? Autos have a way of making even backing gods look like ######## newbies trying to back into anything.

I don't know anything about drive shafts going out of round. They either snap at the U joints or twist. One or the other. ANY thing else breaking would do it in the rears. There is a particular gear that you can take a bite out of if you dump the clutch too hard too fast with too much power. (Ive done it. They want to beat me up black and blue for that particular repair which I think was about 3000 blessed dollars.) worth firing me for it too. But they did not... it was a POS truck. But I don't tell them that while being yelled at. They might stroke out or something.

Soft ground? Now that's a good clue.

It is good you ask.

I can think about this some more as you can see... let's work this out what do you think?

 

If it is a 15 spd can you not just put it in RLL?