Clark GCX25:
Help with transmission noise on GCX15E

Hello everyone!
I have a strange problem on a Clark GCX15E that started rather abruptly according to the operators.
They called me complaining of a noise from under the floorboard area, and also mentioned that when they try to accelerate the unit does not move as fast as it should.
The model / serial is a GCX15E / GX127E-0992-9355KF.
What I found when I arrived is a loud tinny clanking sound from the transmission bell housing area. I checked the flex plate and cannot find any cracks in it at all. However I started using my stethoscope to isolate the noise and it appears the loudest when I probe the external oil pipe coming from just behind the transmission oil filter, on top of the transmission. You can actually feel the clanking on this pipe with your hand.
I removed the transmission oil filter and the valve behind it and found no problems there. The unit does seem sluggish to move when accelerating.
When I push the inching pedal down and release it , well it sort of quiets the noise down but it gets louder again in a few seconds.
Was wondering if anyone has run into this problem.
Thanks everyone, and if I can give any more info please let me know.
  • Posted 1 Dec 2012 23:46
  • Modified 1 Dec 2012 23:47 by poster
  • Discussion started by Scrid
  • Nebraska, United States
Showing items 1 - 7 of 7 results.
Hi, I will pull the numbers off the transmission and report back.
I've personally never pulled a trans on this model.
Any thoughts on how many hours to get it out?
I'm assuming that the easiest way is pull the mast and then trans vs removing the engine.
Thanks again.
  • Posted 31 Dec 2012 02:58
  • Reply by Scrid
  • Nebraska, United States
The hr500 transaxle has the chain in it. Do you have any numbers of the transmission? Email may be helpful.
  • Posted 20 Dec 2012 12:01
  • Reply by rogeriwt
  • Massachusetts, United States
Is there a pump mounted on the back side of the transmission? If there is does it have pipes going to the transmission? You may want to pull the pump out and see if there is any play in drive gear. That gear is driven by a chain that goes around the torque converter. I don't know how common it is but the truck is old and I have seen the chains get play in them.
  • Posted 20 Dec 2012 11:49
  • Reply by rogeriwt
  • Massachusetts, United States
Is that common for this model to need torque converter replacement?
Thanks guys!
  • Posted 8 Dec 2012 23:15
  • Reply by Scrid
  • Nebraska, United States
Sounds like the torque converter is failing. Some Hysters have a pump chain in the bell housing but not Clarks.
  • Posted 8 Dec 2012 20:53
  • Reply by mrfixit
  • New York, United States
If memory serves me right there is a chain that dirves the pum on the back of the converter. In order to access you have to pull the transmission.
  • Posted 8 Dec 2012 09:41
  • Reply by rogeriwt
  • Massachusetts, United States
No thoughts at all?
  • Posted 5 Dec 2012 23:45
  • Reply by Scrid
  • Nebraska, United States

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