Broke the new Deere

   / Broke the new Deere #21  
I thought the bolts might have allowed the shaft to slide off, but that clearly didn't happen, since that's the end with the broken shaft..
John Deere Parts Catalog

I'm not saying you had it in 4WD, it could have been stuck in 4WD. Or if the front does the lock up on 4WD and the shaft spins all the time.
But if the transmission does the 4WD the front shaft would be stationary till in 4WD.. IDK man.. Sorry this happened..
New tractor too..
 
   / Broke the new Deere #22  
Drive shaft to front end spins whenever the front wheels are turning. It is a mechanical connection to the transmission. The transmission has the shift portion that engages the front to to rear. Going down the highway and that drive shaft comes loose it is going to bang and tear something up. Lucky it wasn't the engine oil pan.
 
   / Broke the new Deere #23  
Maybe when shaft broke off at transmission end and flopped around the first time it got stopped momentarily by the deck, causing both damage there and the sudden braking that the OP experienced until something let lose or fell off at the front axle.
 
   / Broke the new Deere
  • Thread Starter
#24  
the only noise it made was a loud hydraulic whine then a pop then some erronious noise as it slowed abruptly which i presume was the drive shaft slamming on the deck then that stopped and it started free wheeling and i stopped it with brakes very strange but i always do get the strange stuff, thanks for the kind words, im sorry it happened too - things break ive had a lot in the course of my life, it was the scare that bothered me more than anything, i am not impressed with the small diameter of the front end differential pinion shaft, i did notice one of the caps is off the ujoint at the transmission shaft which if it flexed it could potentially allow the shaft to fall off the transmission end and whack on the deck but if the front diff locks up the drive from the trannie output shaft i dont see how it could make that whine and stop me abruptly and then throw the trannie into neutral - anyway, i will let deere sort it out - someone mentioned kubota, I have been aquainted with them and have neighbors/friends that have them also, i dont mind orange but they didnt want to work with me on this purchase and our dealer in the area i would not recommend from my rental experience with them also.
 
   / Broke the new Deere #25  
I wonder if something in the trans for the 4x4 seized while driving down the road (or went into 4x4), then, as the rear wheels kept pushing, something had to give. The trans end of the shaft gave out first (are those splines damaged?) either the short spline overlap or u-joint was the weak link. Then the front axle was driving the broken shaft while it beat the deck, bound up, then broke off of the front axle. Just my :2cents:
 
   / Broke the new Deere
  • Thread Starter
#26  
im guessing that something in the trannie happened to cause the whining noise, some valve stuck or something coupled that wasnt supposed to from teh front wheels turning the driveshaft maybe some kind of backpressure or ? i heard no gear grinding or clunk just the pop sound that happened after it slowed nearly instantly, now im going to be afraid to open her up and go fast down the road when i get it back, my butt pucker will be on high alert!!!
 
   / Broke the new Deere #27  
Maybe check that front U joint ... maybe it was mis-installed/defective and was binding when trying to rotate thru all the angles.
 
   / Broke the new Deere #28  
Well, that didnt take long - new 2038R with 32 hours on it.

Put it in H/was driving down to the neighbors on asphalt to move some decorative rock for our subdivision sign landscaping. Got about half way down the hill, appx 1/4 mile from his place to mine.

In 2wd with loader and deck on tractor. Something failed internally in drive line. I am guessing it was the front end but not sure.

Basically from WOT pedal mashed in H to an abrupt stop like a roller coaster at the end of the ride, sounds include high pitched whine and then a loud pop. That was the drive shaft breaking from the transmission to the front end. Thankfully I was wearing my seat belt as i think it would have likely shot me over the hood like a catapult.

It popped the hydro into N and started to freewheel so i braked of course, reduced engine speed and listened for noises. Nothing strange so went on down the hill to move the rocks. Its wet and to keep from tearing up the neighbors yard anymore than I needed I put it in 4wd, it did not work. We have BIG storms coming in so we got the gravel/landscaping done and i came home and put in the barn at dark. I got up Sat Morn and checked and the drive shaft was bent into a curve laying on top of the mower deck. One end that bolts onto a shaft not sure if its the out put of the trannie i didnt pay attention when i removed the shaft - about a 3/4" small shaft is twisted in two. Also the other end it blew out the U joint.

Its always been very difficult to get into 4wd i just attributed that to new gears and tightness. I also noticed its difficult to get the differential lock to work as well. You have to go fwd/rev to get it to mesh in as well. Who knows........just lucky i guess and thank god for seat belts.

So it made no noises and worked ok until i decided to mow last night. I turned on deck and grind/howl turned off quick. When the drive shaft slammed downward and bent it crushed pulleys/brackets on the mower deck. Yeowza what a deal.

Deere is going to come get it thursday. My wife and I had to push mow 1.5 acres yest wow that was quite a joy. Im too old for that !!! Trying to get parts for an older deere rider my kids have and get it going to use until the 2038R is fixed.

I guess i am just lucky to have such odd things happen. They already had to replace the noisy gearbox on the 72 quick connect belly mower I hope this is the last of the gremlins.

I didnt see anything on the internet regarding anything like this so guessing its a rare/odd thing. I always seem to get that type of stuff vs something common.

Get a local guy to cut the lawn till your back up.
Seriously if you get a heart attack will it be worth saving $100.00 - $200.00 to cut the lawn.
 
   / Broke the new Deere #29  
On the bright side when you did engage the 4WD afterwards it isn't making any noise, so hopefully nothing broke inside..
 
   / Broke the new Deere #30  
Yes, strange. After the shaft broke off from both ends, driving in 4x2 was no problem nor was engaging 4x4 noisy or binding.
 
   / Broke the new Deere #31  
correct its the output shaft from the trannie ( drive shaft ) whatever u want to call it that runs to the front end
I have pix i just went out and took them, will have them shortly they are uploading to my email then i can put them on here and you can name/call them whatever you want i call them broken ;-)

View attachment 606764 View attachment 606765View attachment 606766

Looks like something internal to the front axle failed, the shaft you showed is the weakest link and possibly just a result of the front axle failure. Definitely NOT operator error but crappy build.
 
   / Broke the new Deere #32  
Looks like something internal to the front axle failed, the shaft you showed is the weakest link and possibly just a result of the front axle failure. Definitely NOT operator error but crappy build.

If he was not in 4x4, why would the shaft fail?
 
   / Broke the new Deere #33  
I am waiting for the verdict from JD, keep us posted.
 
   / Broke the new Deere #34  
I'll bet the broken front axle drive shaft tangled with the mower drive shaft and damaged it. Then when the mower was used the damage showed up.
 
   / Broke the new Deere #35  
If he was not in 4x4, why would the shaft fail?

Bad metal? Manufacturing defect? From the other posts, I gather that shaft is rotating all the time whether it's being driven by the transmission or not. If it was bad from the factory, it may have just let go from the rotational forces. That would explain why everything else still worked, drive, hydraulics, etc. The MMM may have worked also if it hadn't been whomped on by the flailing shaft.
 
   / Broke the new Deere
  • Thread Starter
#36  
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
 
   / Broke the new Deere #37  
With only 36 hours I hope that they replace the shaft if the splines are that bad.
 
   / Broke the new Deere #38  
correct its the output shaft from the trannie ( drive shaft ) whatever u want to call it that runs to the front end
I have pix i just went out and took them, will have them shortly they are uploading to my email then i can put them on here and you can name/call them whatever you want i call them broken ;-)

View attachment 606764

Looks like when the back end of the drive shaft snapped at the tranny (for unknown reasons) when going at road speed and the drive shaft flopped around, then jammed something solid and couldn’t turn anymore.
All that momentum and front tires turning it snapped the shaft at the front axle and almost threw OP over the hood.
 

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