Model #K46BT TUFF TORQ Transaxle/Transmission, Tractor

  • Transaxle-k46bt
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Question and Answers

Q:

917.288530 yard tractor not moving as fast as it used to 917288530 Craftsman Tractor

A:

Supplement: After contacting the manufacturer of the transaxle, Tuff Torq, and changing the transmission oil per their recommended the problem is unchanged. Per Tuff Torg this transaxle model K46BT is not considered non-serviceable and should have it's oil changed on a regular basis. I think this had a lot to do with why my transmission has failed after only 5 summers. Now Tuff Torq is telling me the transaxle internals are shot and needs rebuilt or replaced. I can now spend $400 to rebuild the transmission myself since the local repair shops will not rebuild based on how quickly the rebuilt units fail or spend $800 for a new K46BT transaxle to replace from Tuff Torq or $900 from Sears parts Direct. The reviews for this transaxle on the Internet are not good and most label this a substandard quality transaxle. The entire mower only cost me twice the cost of the new transaxle. Now 5 years in I have a mower too slow to be practical to mow my yard and will eventually stop moving completely. Local repair shops have offered between $100-$200 for the engine if I haul the mower to them but I don't have a trailer and it is $75 pickup charge. Not leaving me in the best of positions or feeling that committed to repurchase a similar mower from Sears or any other brand using this class transaxle.

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Shawn -
October 09, 2015
Q:

Craftsman tractor model 917.289281 917270662 Craftsman Tractor

A:

Thanks for the inquiry and for being a valued member.

You provide two tractor models in the description, so I am not sure which one is applicable. Based upon the first model, the transmission is a K46BT, and I have linked the instruction sheet below showing the fill port.

K46BT Service Port

I hope this helps and thanks for using SearsPartsDirect.com. We appreciate your business. 

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Jeff Wallace Sr -
Sears Technician
August 05, 2015
Q:

Automatic transmission? 917276906 Craftsman Tractor

A:

Thanks for the inquiry and for being a valued member.

I am sorry to hear of the issue you're having engaging the motion on the tractor from a stop or incline. I know how concerning that is to have happen.

If the belt is fine, put the tractor in neutral or pull out the free wheel rod and try to push it. If you can push the tractor, you know the brake is not the problem. If you cannot push the tractor the problem is likely a stuck brake. You will need to mover the brake lever on the transaxle to see if it is sticking. If it is stuck you should be able to free it up by spraying a little WD-40 on the brake lever. Then work it back and forth.

Your tractor has a hydrostatic transaxle; I recommend you try to purge the air out of the system. The purging instructions can be found in your owner's manual on page 18.

If the information above does not cure the problem, I recommend checking the oil level in the transaxle. I have linked the Tuff Torq information sheet for this model of transaxle on how to check the fluid.

Tuff Torq Fluid Check on K46BT

I hope this helps and thanks for using SearsPartsDirect.com. We appreciate your business. 

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Jeff Wallace Sr -
Sears Technician
December 10, 2014
A:

Thank you Jeff!

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Gary -
December 13, 2014
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