JD 4120 Transmission issues

   / JD 4120 Transmission issues #1  

dunhamg

New member
Joined
May 1, 2009
Messages
9
Location
Waterville, IA
Tractor
LX 279, 4120
Anyone else ever have this happen with their 4X20 tractor with a PowerReverser Transmission? When I am in C range either 3rd or 4th and get over about 1500 rpm's I get a terrible grinding noise from the transmission. Slow down and it goes away. Tractor has about 300 hours on it and a month out of warranty. Just happened Saturday driving over to the neighbors to help him unload a feed bunk with the loader. Happens both in 2wd and 4wd. Waiting for dealership to come out and take a look at it tomorrow.

Thanks,
Grady
 
   / JD 4120 Transmission issues #2  
I am having this same issue on my tractor Have you heard what the cause was mine has 1440 hrs

Thanks in advance
 
Last edited:
   / JD 4120 Transmission issues #3  
:welcome: to TBN

You may want to send a PM to member dunhamg to get some feedback, hopefully here so others will learn what was the cause of the grinding noise he experienced.
 
   / JD 4120 Transmission issues
  • Thread Starter
#4  
:welcome: to TBN

You may want to send a PM to member dunhamg to get some feedback, hopefully here so others will learn what was the cause of the grinding noise he experienced.

Sorry, apparently when I replied earlier it didn't post.

It was a loose hose clamp on a hydraulic return line and apparently it was sucking some air and the hydraulic pump is what was making the awful racket. The dealer found it and had to replace a few o-rings in the pump, but otherwise it was good to go. Ended up being a $300 bill for the fix.

Grady
 
   / JD 4120 Transmission issues #5  
Grady
Thanks for the update. :thumbsup:
 

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