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  1. #1
    Super Member
    Join Date
    Dec 2007
    Posts
    7,558
    Location
    Central Ohio
    Tractor
    JD 5520, 790 TLB-- Kub L4300, B7800, MX5100, M6800

    Default Anyone switch away from SUDT and then back to describe difference?

    A few years back in my B7800 I switched away from kubota SUDT to JD trans oil just because I had some. Now I'm thinking of switching back to Kubota SUDT. Anyone else do this and notice a difference in transmission performance or gear whine? I've keep hearing good things about the Kubota SUDT oil.
    ****

    May I be the kind of person my dogs think I am,

  2. #2
    Veteran Member Deano's Avatar
    Join Date
    Oct 2008
    Posts
    1,233
    Location
    Southern Maryland
    Tractor
    Kubota BX24

    Default Re: Anyone switch away from SUDT and then back to describe difference?

    If you need to buy the oil...may as well use the SuperUDT2 that kubota sells...
    Deano
    2006 BX24, 6' Modern Implements rake, Woods RB60 rear blade, Wallenstein thumb, Bro-Tek rear skid plate, home made front skid plate, W.R. Long flat tooth bar, 4' finishing mower (TPH), 4' box blade, post hole digger, New style seat!!!!!, Agri-Fab drop spreader.

  3. #3
    Super Member JOHNTHOMAS's Avatar
    Join Date
    Apr 2008
    Posts
    6,620
    Location
    Somerset, Ky
    Tractor
    B2650 F3080 ZD326 Z122r RTV1140

    Default Re: Anyone switch away from SUDT and then back to describe difference?

    Several people with HST over the past few years have posted that they changed and had worse results/whine and changed back to kubota SUDT. Some of them may or may not see this post. I've nevr considered changing myself but no other brand has offered to provide me free fluids if I'll try theirs. Until they do, I won't. And not sure I would even if they did.
    2016 B2650 FEL, 2015 ZD326rp 60" rear Discharge Deck, 2012 F3080 4WD 72" rear discharge deck ,2015 Z122r, 2010/2009 RTV1140CPX , RatchetRake, BB, 50" Tiller, Front Backhoe, Snow plow,Forks, .. and Horse Drawn disk 13 Toyota Tacoma Double Cab, 17 Cadillac XT5. 2012 MINI Cooper S Roadster

  4. #4
    Silver Member Shutesbury's Avatar
    Join Date
    Sep 2010
    Posts
    136
    Location
    Western Massachusetts
    Tractor
    Kubota BX-24 - other goodies listed in my profile.

    Default Re: Anyone switch away from SUDT and then back to describe difference?

    I used Tractor Supply's house brand for my first change (though it had been serviced by the previous owner). I suspect it had the older UDT when I bought it.

    Anyway, with the TSC, it worked fine, no foaming, power loss, etc. But it did whine more, and that dropped off dramatically when I switched over to Super UDT on my last change.

    I've read that the BX series are more susceptible to the whine issues due to valving sizes.

    Paul
    2008 BX-24 with MMM, brush hog, york rake, rear blade; handcrafted 5-tine forks; clamp-on pallet forks; bolt-on/off ripper tooth for BH bucket; Bro-Tek real wheel spacers and BH thumb; Piranha toothbar; Ratchet Rake; 3pt snowblower; extra LED lighting.

  5. #5
    Elite Member Baby Grand's Avatar
    Join Date
    Nov 2007
    Posts
    4,506
    Location
    Windsor, CT.
    Tractor
    Kubotas: L3240GST B2320HST B5100D & G5200H

    Default Re: Anyone switch away from SUDT and then back to describe difference?

    I did my 400 hrs service with TSC. This is on an L3240 with a GST (shuttle) tranny. No noticeable difference, so far, but I'll see how it goes this Winter before I form a final opinion. Cost was a lot less for 15 gallons. Needed 11-12 to refill, so I've got some for topping off. I'll be keeping SUDT/SUDT2 in the new B2320 since it's got an HST tranny, and based on comments here about reduced whine with the SUDT.
    Last edited by Baby Grand; 08-21-2013 at 07:07 AM.
    That's the problem with trouble.
    It always starts out as such fun."
    - Randall Brown

  6. #6
    Super Member
    Join Date
    Dec 2007
    Posts
    7,558
    Location
    Central Ohio
    Tractor
    JD 5520, 790 TLB-- Kub L4300, B7800, MX5100, M6800

    Default Re: Anyone switch away from SUDT and then back to describe difference?

    Yes, I think the only real issue is only with the HST transmissions. I use Deere trans fluid in gear drive Kubotas with no problem but the B7800 HST whined more than I thought it should. On the belief that the whine means something, I switched back to super UDT and the excess whine is gone. The tractor "feels" better as well in that it seems "tighter" in the gears when in use.

    It's probably just because it's a synthetic but until someone else can compare some other brand of synthetic we won't know for sure.
    ****

    May I be the kind of person my dogs think I am,

  7. #7
    Super Member
    Join Date
    Dec 2003
    Posts
    8,643
    Location
    NC
    Tractor
    Kubota Grand L3830

    Default Re: Anyone switch away from SUDT and then back to describe difference?

    I agree 100%.

  8. #8
    Bronze Member
    Join Date
    May 2009
    Posts
    63
    Location
    Austin, TX
    Tractor
    Kubota L3940 with 3rd function and skid steer FE

    Default

    When my L3940 hit 50 hours I replaced the factory UDT fluid with Mobil 424 which I thought was a little better than the stock fluid.

    Last month I did the 400 hour service and switched to the new SUDT2 and can't believe the difference. Much quieter, better loader and HST controls and my sticky 3rd function is almost healed.

    Best change I have ever made.

  9. #9
    Veteran Member
    Join Date
    Jan 2012
    Posts
    1,869
    Location
    Success Missouri
    Tractor
    Kubota L3800DT, L3750DT Shuttle

    Default Re: Anyone switch away from SUDT and then back to describe difference?

    I'll stick with SUDT2 even though I have gear drive.
    I feel the hydraulics will work better and last longer with the better oil.
    Don
    Kubota L3750 Hydro Shuttle, 4wd, FEL; L3800 Gear drive, 4wd, FEL
    Husqvarna XP chainsaws 346xp X3, 357xp, 562xp, 359

  10. #10
    Silver Member rayclar's Avatar
    Join Date
    Mar 2010
    Posts
    203
    Location
    prince township , ontario, canada
    Tractor
    kubota 4310hstc

    Default Re: Anyone switch away from SUDT and then back to describe difference?

    On my 1999 l4310 with 1958 hours i switched from udt to sudt2 and the difference is unbelievable. So much quiter and smoother running.

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