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tuff torq k71b interchange


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#1 thompson1600 OFFLINE  

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Posted April 24, 2011 - 12:15 AM

Looking for information on the Tuff Torq K71B, which is in a GT245 (2003 model year). Are there other transaxle hydro's that will fit into the GT225 GT235 or GT245? Specifically will the K71C, which has differential lock fit? Any other info?

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#2 JDBrian OFFLINE  

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Posted April 24, 2011 - 05:56 AM

Hi

If I remember correctly the K72 has the dif. lock and is otherwise identical to the 71. A few years ago I was trying to decide which GT to buy. The GX345 had the K72 with dif lock and the GT's I believe were K71. I ended up with an X475 -K92 . You can check the Tuff Torq web site. Sometimes you can find the JD product guide on line. I have seen one for 2005. It goes into a lot of detail on the tractors.

#3 thompson1600 OFFLINE  

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Posted April 24, 2011 - 08:15 AM

Thank you. I was able to get a little more info on google with the k72 info. What I still can't find, even on the tuff torq site, is an interchange list. Which transaxles are similar enough to each other to fit into which machine? Has anyone tried to change out the K71B, K71C or K72 with the others? Or, does anyone have some of them they are selling to compare dimensions? I e-mailed tuff torq and never got a definitive answer, seems the JD stuff is sold proprietory to John Deere.

Has anyone measured the bolt patterns on any of these transaxles? Specifically the K71 and K72?

Edited by thompson1600, April 24, 2011 - 09:04 AM.


#4 JDBrian OFFLINE  

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Posted April 24, 2011 - 11:37 AM

Why don't you go to the jdparts site and look up your tractor. You will be able to get part No's etc. Then you can look up a GT of similar vintage that has the dif. lock. You can see if the frame or mounting hardware etc. is the same part number. You can also see the physical configuration to some extent, but the diagrams are not to scale and leave out some views and information. This is probably to protect the design from being easily copied. If you are near a JD dealership try asking the service department. I am sure someone on here will know more about this.

#5 thompson1600 OFFLINE  

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Posted April 24, 2011 - 11:22 PM

Well here's what I think I found out; The GT225, GT235, GT245, LX280, LX289 and GX255 all use the same frame. The GT225 GT235 and GT245 use the Tuff Torq K71B transaxle. The GX255 uses the K71C with differential lock. So you should be able to exchange the K71B and K71C. The K71C is also used in the GX335 GX345 GX355 and the GX255. The K71A is used on some of these too, but that does not have differential lock apparently. So, you should be able to swap out a K71C to get differential lock. I can't find where the GX345 or GX series used the K72. The GX series used the K71 series. The K71A without diff lock and the K71C with diff lock.

The new X300 and X500 series use the same frame AM137099. The X300 uses the K46 transaxle. This is also used in the L120, L130 155c LA130, LA135, LA140, LA150
LA155, LA165, LA175 X300, (X304 after 2007) LT160, LT180. The X534 and X540 use the new K72A transaxle with hydraulics and other X500 series use the K72C with all wheel steer. The earlier X304 used the K58; which is also used by the X320, X324, X340, x360. I can't find yet any connection to where a machine that fits the K71 series will also fit the K72 series.

Anyone know if the K72 series is a bolt on replacement for the K71 series?

#6 JDBrian OFFLINE  

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Posted April 25, 2011 - 05:46 AM

I was going by memory and I may have confused K71 and K72 (It's been 6yrs since I looked at those tractors). Did you get the above info. from JDparts? I find that it is a very valuable resource when doing research on different tractor models. You can dig up information to determine what the differences in models really are. Have you thought of going to a JD dealer and taking a look at a X500 series tractor with the 534 or 540 and measuring the mounts, for the K72A. You should be able to see the dif lock mechanism as well. You can then determine if it will fit your frame. There may be info on the Tuff Torq site on the physical dimensions. However, JD may be having their axles custom made.

#7 thompson1600 OFFLINE  

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Posted April 25, 2011 - 12:46 PM

I did get most of the info from JDParts. I hadn't seen the where are they used search function before. I was also surprised that the X300 and X500 had the same frame number. I thought the X500 had a thicker beefier frame than the X300? I have not been able to find any dimensions on the Tuff Torq site. They have exploded parts diagrams, but I haven't found dimensions. It's a quite a ways to the nearest JD dealer. And they don't always stock a lot. I'll drive into the Twin Cities this week and take a look at a dealership there, hope they won't get mad at me for taking some pictures and measuring under their machines. :)

I also found a thread somewhere that had the following info, that was really good;

Here's what some models have for transaxles.

K40 -
L100, L108, L110, L111, L118
102, 115, 125, 135, 145
LA110, LA120
LA115, LA125, LA135, LA145


K46 -
L120, L130
155c
LA130, LA135, LA140, LA150
LA155, LA165, LA175
X300, (X304 after 2007)
LT160, LT180


K58 - (X304 before 2008), X320, X324, X340, x360


K60 - LX176, LX188


K62 - 190c, LX277, LX280


K66 - Husqvarna GT, GLS, GXLS and some of the Craftsman GT's


K70 - 325, 335, 345, 355


K71 - GT225 GT235, GT245, GX255, GX325, GX335, GX345, GX355


K72 - X500, X520, X530, X534, X540


K91 - 425, 445, 455


K92 - X700, X720, X724, X728, X729, X740, X744, X748, X749




Transaxle, Variable Speed Hydrostatic

Model X500, X520 K72B

Model X534 K72C

Model X540 K72A




Transaxle, Variable Speed Hydrostatic

Model X300 K46

Model X304, X320, X324, and X340 K58



kanzaki and tuff torq same company? Yes it is sometimes listed as Kanzaki Tuff Torq.
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