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  1. #1
    New Member
    Join Date
    May 2009
    Posts
    9
    Location
    Franklin PA
    Tractor
    Kubota BX23, Cub Cadet 129

    Default Cub cadet 129 hydro tranny slipping

    My old workhorse is getting tired. My yard is mostly flat, but when going up a slight grade or in sharp turns, the tractor slows to almost a stop. I have to move the lever to get it to pick up speed again. I have tightend up the drag on the directional control lever, so it is not drift in the lever, and the engine does not seem to bog down at all. The reservoir is full of hydro oil. Any ideas on where to look? My local dealer gave me some nonsense story I am not even going to justify by repeating. The fluid is fresh and clean, the filter was regularly changed.

  2. #2
    Member Smitrock5's Avatar
    Join Date
    May 2010
    Posts
    27
    Location
    Zanesville Ohio
    Tractor
    Cub Cadet 129

    Default Re: Cub cadet 129 hydro tranny slipping

    I wish someone would reply to you man....My 129 is slowing down a ton!! Not even on hills...just in general. I have to move my lever almost all the way up just to get it to go. Then it only goes about half speed when I have it opened all the way up. Did you get any responses anywhere else that may help us??
    J

  3. #3
    Elite Member dex3361's Avatar
    Join Date
    Aug 2008
    Posts
    3,568
    Location
    N. of Charleston WV
    Tractor
    Kubota L4400-1 HST,FEL, 3x3 remotes, TNT. BX1500 54 mmm

    Default Re: Cub cadet 129 hydro tranny slipping

    I had the same problem on mine and it was in the drag of the directional control lever I had to remove the friction clamp make it so that it would clamp a little tighter on the shaft. It could be in the HST linkage it would not take much slop to cause an issue like this.
    Randall



    1Timothy Chapter 2:
    3 For this is good and acceptable in the sight of God our Saviour;
    4 Who will have all men to be saved, and to come unto the knowledge of the truth.
    5 For there is one God, and one mediator between God and men, the man Christ Jesus.
    From: The HOLY BIBLE

  4. #4
    Bronze Member Sam Mac's Avatar
    Join Date
    Dec 2009
    Posts
    75
    Location
    Galax VA
    Tractor
    Kubota BX2660, Cub 1210

    Default Re: Cub cadet 129 hydro tranny slipping

    If the pump is getting tired you could be getting a lot of leakage past the pistons in the pump. I'd drain the trans, replace the new filter and fill it with Shell Rotella T 15-40. also check the cooling make sure the pump is clean and that the fan is good. They don't like heat.

  5. #5
    Elite Member
    Join Date
    Jul 2007
    Posts
    3,237

    Default Re: Cub cadet 129 hydro tranny slipping

    First thing to examine is the hydro trunion assembly on the side of the hydro. There's a slotted gizmo that wears. Usual repair found here: Trunion Repair Part 1

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