Broke the new Deere

[Atchuuu]

Causes and Fixes of Drivetrain Windup

Good to know. Never knew that you shouldn't drive on pavement in 4x4 mode. Makes me wonder though, is there really enough slippage on grass that it doesn't present a problem in 4x mode? I have driven on grass/dirt on a number of occasions in 4x4 mode because I forgot to go back to 2x4

 

[Agvg]

Good to know. Never knew that you shouldn't drive on pavement in 4x4 mode. Makes me wonder though, is there really enough slippage on grass that it doesn't present a problem in 4x mode? I have driven on grass/dirt on a number of occasions in 4x4 mode because I forgot to go back to 2x4

No problem, driving on pavement are no problem but it will give more wear on the 4WD system.

 

[CobyRupert]

No problem, driving on pavement are no problem but it will give more wear on the 4WD system.

When the front (x gear ratio) and rear tire circumferences aren't perfectly matched something has to slip when the tractor rolls.

The wear is because drive line is getting torqued.
The torque required to slip big rubber tires on pavement.
Seems this would wear the tires significantly too.

(IMHO) If the tractor is heavy, the tire's contact area is large, or the drive line is weak, or a combination of how these factors relate to each other, there definitely could be a problem.

 

[cdaigle430]

If he was not in 4x4, why would the shaft fail?

Your looking at the wrong failure point, the shaft failure looks like it was a result of something else in the drivline locking up. The shaft is the weakest link.....he heard the hydro getting louder just before the pop.

 

[Agvg]

When the front (x gear ratio) and rear tire circumferences aren't perfectly matched something has to slip when the tractor rolls.

The wear is because drive line is getting torqued.
The torque required to slip big rubber tires on pavement.
Seems this would wear the tires significantly too.

(IMHO) If the tractor is heavy, the tire's contact area is large, or the drive line is weak, or a combination of how these factors relate to each other, there definitely could be a problem.

If your drive train is in good health this is not a problem, not saying it is a good practice but shouldn't wreck your machine.

Yes you will have a lot more front tire wear, most tractors the front wheels pulls a little faster than the rear from factory.

 

[searcyfarms]

exactly why i dont use 4x4 unless im going to enter something questionable for traction or im trying to prevent from making ruts and tearing up my yard, i only had it in 4wd a couple times this winter, not to mention anyting is harder to steer in 4x4 and slides front end and doesnt turn as well which is not conducive to a nice yard - you will know instantly if you have any vehicle in 4wd on pavement especially if you turn then throw a loader on the front end mercy there will be no question you forgot something - you will notice the same on dry ground/dirt just not as pronounced, mud/snow you wont notice it much if at all

and yes the fronts pull faster on my 2038r deere and my 2210 did the same - very easy to notice in snow, you will tear the ground up in mud/dirt but there is a price for not getting stuck hopefully

deere was just here and picked it up about 30 mins ago - i personally think something in the hydro had to have caused it with the whining noise and once the front pinion shaft popped or when it threw the hydro from High to Neutral it relieved the pressure from whatever was stuck/engaged - things went back to normal and no more bind

I just worry about it happening again, hopefully they can reproduce it

 

[Industrial Toys]

The front and rear are never matched! The front always goes a bit faster.

 

[CobyRupert]

I think it somehow got into 4wd. When it bound so much that the shaft or universal popped, that shock kicked it into neutral.
I’m not a mechanic and I didn’t sleep in a Holiday Inn Express last night.

 

[rScotty]

other notes..........the MMM has never been off and its the quickconnect that you drive on and it locks into position and there is not really a way i can see the MMM pto shaft would be able to make contact with the Front drive shaft - when i got it the MMM gear box was VERY noisy and deere agreed and replaced it right out the gate. They said they had a couple like that and one also self destructed. The replacement MMM gear box has been normal noise for a gear box.

And you are correct - the front drive shaft rotates at all times, the drive to it is provided by coupling inside the transmission when you engage the 4x4 lever. I have another conversation in here regarding my reviews of the 2038R and i complained months ago that it was stiff and hard to manipulate the lever, its a pull up, push down type T handle that comes up from the floor board/operation station.

I bet they dont come up with much of anything. I am guessing something bound up and until it breaks this may happen again. The mystery to me is the hydraulic whine that makes me lean to something in the hydro/pump - i will be curious to see if the 4x4 handle is easier to engage and disengage once repaired. Also it does look like there is a little damage to the splines/shaft that comes out of the trannie not sure if it will be repairable by filing out the grooves or if its damaged too much.

They come to pick it up in the morning

That is a lot of failures on a new machine. Does your state have a "lemon law"? Are you going to keep the machine? If it were mine, I'd seriously consider just returning it to the dealer and buying a different make or model.
rScotty

 

[searcyfarms]

i am not concerned about any lemons, gear box noises these days are common in my world, everyone gets a bad batch of something now and then, cars/motorcycles/computers/toasters, stiff levers/gears i can work through that with the dealer, the trannie thing...........not sure what this will turn into but maybe they will find something in this process and it will all get taken care of. I have faith and try not to get too spun up anymore, its hard on the blood pressure.

I have lived through the torment of a 6.0 powerstroke and after i got it bulletproofed, its been terrific. Many curse them but once you fix them, they will go forever.