Tuff Torq K46 ǀ The Most Popular (IHT) in the World

The Tuff Torq K46 is the most popular integrated hydrostatic transaxle (IHT) in the world…and for good reason.
This power unit has all the features and performance of much larger and more expensive transaxles, all at a very affordable cost and in a small and purpose-focused design. This transaxle has a proven track record in a vast array of applications in all kinds of conditions. We are confident that the Tuff Torq K46 is a great choice for your next riding mower or lawn tractor project
Why Choose Tuff Torq?
Many companies will immediately tell you how wonderful their products are by jumping right into discussing features and benefits, we’ll get into that below, but first… in our opinion, great products can only be made by great companies and Tuff Torq is truly a great company.
Here’s why, Tuff Torq exists to provide a secure future for our employees, benefit the community, and respect the environment…we just happen to build the highest-value off-highway powertrain solutions in the world.
Now for the features and specifications…
Features
- Patented L.O.G.I.C. case design for easy installation, reliability and serviceability.
- Internal wet disk brake system
- Reversible output/control lever operating logic for application optimization.
- Smooth operation for either foot or hand control system.
Specifications
Specification | Value | Units |
---|---|---|
Application | Rear Engine Riding Mower Lawn Tractor |
|
Reduction Ratio | 28.04:1 21.53:1 |
|
Axle Torque (Rated) | 28.04:1 = 231.4 (171) 21.53:1 = 177.7 (131) |
Nm (ft-lb) |
Max. Tire Diameter | 28.04:1 = 508 (20) 21.53:1 = 457 (18) |
mm (in) |
Brake Capacity | 28.04:1 = 330 (243) 21.53:1 = 253 (187) |
Nm (ft-lb) *@ 350 N (79 lb) Brake arm force |
Displacement (Pump/Motor) | 7/10 | cc/rev |
Max. Input Speed | 3,400 | rpm |
Axle Shaft Size | 19.05 (0.75) | mm (in) |
Weight (dry) | 12.5 (27.6) | kg (lb) |
Brake Type | Internal Wet Disc | |
Housing (Case) | Die-Cast Aluminum | |
Gears | Heat-treated Powder Metal | |
Differential | Automotive-type Bevel Gears | |
Speed Control System | Foot Control: Dampening system or external shock absorber available Hand Control: External friction pack and lever avalailable |
|
Bypass valve (Roll Release) | Standard | |
Hydraulic Fluid Type | Proprietary Tuff Torq Tuff Tech drive fluid recommended. (Contact OEM for other options) |
For more information, download the Tuff Torq K46 brochure here Residential-IHT-brochure-web
Whether you are a customer, distributor, dealer, or OEM we would love to hear from you. Please reach out using the form below!
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Sears can’t get me parts for my Tuff Torq K46BT on a Riding Mower Model 917.288573. Where can I get the following
Quantities in parenthesis and part numbers are from sears parts manual that came with the machine.
(1) 414401 Seal Tc 153507, (1) 414419 Seal 16*22*.03, (2) O ring 1aP12, (2) O ring 1aP14, (2) O ring 1aP10a
I have a Deer L130 what axel will work as an upgrade to the k46
Necesito comprar una transmisiom K 48BA
I have a tufftorq K-46 T20 transmission. Someone has removed barcode with Serial number on it. How do I order parts?
I own an independent power equipment service company. I do service and repair on all types of small engine driven power equipment, from string trimmers to chainsaws and lawnmowers to yard and garden tractors. I currently have in a John Deere D140 yard tractor that has been turned on its side and leaked some of the hydraulic oil out. I need information on the type of fluid and total fluid contained in the MIA10910;T40J. Also I need info on how to tell if it is full to factory spec, since there is no dipstick, and where this proprietary fluid can be obtained. I have rebuilt these type of hydrostatic transmissions in the past, but would prefer to not remove this one, since it has previously worked well. Please help.
Hi
I am looking for a left axle shaft for a K46e
Serial number K46e 0019769
Countax p/n 478000301
Hi I have a simplicity Broadmoor 46 cut 20 hp Tuff Torq 7A646084230 s/n 57k 0008761 trans. will not go up hills ,and creeps in reverse. oil full ,new belts, Is there a rebuilt kit for this unit? Any ideas on problems? Thanks
I have 2016 husqvarna yt48 ls have trouble finding transaxle Tuff torg k 46cr part 501051401
Need a new transmission or rebuild kit for my LA 145 jd riding mower
Are the k46bt and k46dm interchangeable?
I think I have a k46 transaxle on my craftsman mower. I keeps throwing the drive belt at the trans axle drive pulley. The belt is new and of the correct size. I removed the transaxle Faron the mower and see the belt pulley is worn. Can I buy a new pulley from tuff torque. I have the bar code label with the specs on it?
I’m looking for a replacement for my Tuff Torq 7A646084322 transaxle.
I have a failed Tuff Torq transmission removed from my Husqvarna riding lawn tractor (I was told it was irreparable but, on a whim, retained it anyway). I have since learned it is probably ‘rebuildable’. What I need is a list of the proper parts kits and an exploded diagram for this particular transmission (the online part & kit number listings are confusing to navigate). I suspect my old transmission does not have any significant issues so a seal kit and fresh oil may be the starting place. This unit is 7A646084181 with serial number 46BT0594051. Any other suggestions will be greatly appreciated. Thank You!
Good day I have a question about the K46 transmission does it have two speeds or a high and low gear when you put it in neutral then re engage it it seems there are two spots that you can use that the tractor will go forward or back thank you Terry Ashe
Just received a new k46 transmission from tuftorq. Is this unit ready to go or do I need to bleed air from it.
Can you buy a work stand for it? Thanks
I’m interested in purchasing a Cub Cadet riding lawn mower because my Poulan Pro has transmission problems. However, since our lot has somI won’t spend e hilly area, I need to purchase a mower with a more sturdy tranny. I am frustrated in that when I look at the various Cub Cadet mowers, all they say for transmission is Tuff Torq, but NOT which one. I won’t spend $2500 – $4000 not knowing whether I’m purchasing the smallest (weakest) transmission or one that will stand up. The alternative is buy Husqvarna or any other brand that one can find out WHICH Tuff Torq transmission the mower uses. Help or lose a customer
I have a john deer X300 and the right axle shaft has broken. I am looking to rebuild it. I bekieve I have the K46 Tuff Torq. Sticker on the transaxle has the following info. Along with a barcode
TUFF TORQ 7A646084130 SN: 46BC0023039
JDHW AM134747.
Are you able to help me ide tofy the proper reapir kit to purchase?
I would like a diagram showing how to replace the right rear axle on a K46 AW transaxle
Hello,
No, the K61 is a very different design and is not interchangeable with a K46.
My John Deere LA 110 mower stopped and the drive belt started smoking so I turned off the engine. then I pulled out the lever in back to put it in neutral so I could move it to a more convenient place. Do you have parts to rebuild the transmission or is it finished?
Mine appears to be having difficulties. Belts, tension, pulleys look OK. Apparently no front supports on this one (see p8 file:///C:/Users/John/Documents/YardEquipment/Husquvarna%20yth24v48/Parts_husqvarna-repair-parts-yth24v48-manual-optimized.pdf ) Has thick oil coating on axel housings (both sides) so may have leaked oil. Help needed. Husqvarna YTH24v48 no problems other than belts/blades/filters before this. Was going up hill when it spun a tire and I backed up, now it is not moving at all, having crept briefly at 1/3 speed. Makes normal “i’m working” transmission/pulley sounds.
PRODUCT 960450046
MAINTENANCE LEVEL 00
SERIAL 112213A004439
MODEL 96045004600
MODEL YTH24148 (I see yth24v48 on the hood of the tractor)
Your specs for the K46 transaxle says it has a 3/4 ” axle shaft. the XT2 LX42 Cub Cadet tractor specs says it has a K 46 transaxle with 1″ axle shaft. Which one is correct? Thank-you
how to determine if pistons on pump or motor are worn? specifications to measure them.
Can you rebuild or refurbish these pumps or motors? Is repair kit only option?
looking for parts for 7A64+6084180 S/N 46BT029180
Thanks
Hello I am in New Zealand and have a mower with a K46L that is worn out. I have been unable to find a replacement but have been offered a K46CY . I have the skills to make some basic modifications to make it fit if there is some minor differences but are they smaller enough to allow that
What’s the difference between a k46 and a k46e? Thanks
can i replace my k46 in my johndeere 130 with a k57r transaxle
I have a 6 yr old John Deere LA130 that needs a new transmission. Is the K46 the correct model and what other parts do I need to add to it?
Costs would be great too.
What is the difference between a K46 and a K46BE
i just bought a new K46 axle from amazon does these have the oil done in them it came in a husqvarna box New. Just needed to know?
Price of jd transaxle 7A646024090. K46
Is the K46AC similar to the K46BE? My newer mower uses the K46BE. The old mower that lost the K46AC is 16 years old. I’d be willing to buy a new K46BE to replace the bad K46AC, if it would work in the old mower, then it would be a spare transmission for the new mower, should anything happen to the old mower…
After removing the axle seals. I found the bushing had walked out past the limit per your illustration.
I would like to know what tolerances to expect with new bushings (axle run out) so I can make a more informed decision about new bushings. I also need part no.s for inner and outer k46bt parts. Thank you for your help so far.
The bt model originally has the splash plate’s big end down. If this is true. It would take a (be) model with the splash plate inverted to operate (properly)?
Referring to a previous post. What exactly will happen by interchanging the BE with the BD models?
How much axle run out is too much. I put a dial indicator on the axle and got a (0.010) ”
movement. My axle seal is leaking.
F
Do the bushings need replacing along with the seals?
I have a craftsman 46″ 24hp mower model ” 24420 t8200 pro series with 260 hours on it. Possibly K46 DM trans. It barely backs up but goes forward fine. Any ideas what to do?
will a K46BE interchange with a K46BT?
I purchased and installed a K46C transaxle on a John Deere in June,2017. It is slipping when I cut uphill. It was prefilled with oil. Is there anything I can adjust or a way to check the oil?
The original trans served me well for 15 years.
I may need to purchase either a K46 transaxle or the repair kit from you. Can you send me the pricing information? I’m not a repair shop, so whatever your retail price is. My transaxle probably stripped when the Ariens tractor ran out of gas while driving down a steep hill. The stress was enough to bend the tractor frame. I repaired the frame and reinstalled the transaxle, but it isn’t responding (and the release for transport IS engaged). The drive belt is turning and the transaxle pulley is spinning.
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