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Post Info TOPIC: Auto-Rx in Garden tractor??


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Auto-Rx in Garden tractor??
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I bought a used John Deere LX120 that comes equipped with a TuffTorq K46 model hydrostatic transmission.  These trannies have a history of low longevity.  They kind of grenade at somewhere between 200 and 500 hours and the symptoms are low torque on flat/slightly sloped ground and failure to climb hills.  My L120 at 180 hours is exhibiting this condition right now.  I didn't know about this when the dude sold it to me, and it runs great -- for about 25-30 minutes.   Long enough for a demo ride.  (Sigh.)

The fixes I've seen range from a complete trans upgrade to their K66 model (a $1500 upgrade) to a replacement K46 (about $600/800 depending on where you find it) and I just found today a technique to rebuild the trans for about $200 in parts and 4-5 hours of your labor.
I was wondering if Auto-Rx had ever been used even as a palliative measure.  I'm at the beginning of the mowing season.  If I can use Auto-Rx to get another 50 hours of operation out of the tractor I can rebuild it during the winter months.
Any thoughts?
BTW, it is a sealed unit so a teardown would be required in any case to do anything related to changing out fluid or filters.  That's the one thing that recommends a K66 (which has replaceable filter units and an oil drain plug) but I don't feel like spending $1500 - that's twice what I paid for the tractor itself.


-- Edited by Frank on Saturday 25th of May 2019 12:45:44 PM

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RE: ARx in Garden tractor??
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Is this a belt driven transmission ? if so don't add anything except your approved OEM Fluid.as needed

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Frank J. Miller


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Yeah, it's belt driven.  Rebuilds of the K46 (and the transmission vendor as well) have counseled a switch to a synthetic from the 10w30 that comes as OEM.  

I'm continuing to lurk on a tractor forum to get more details.



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