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  1. #1
    New Member
    Join Date
    Aug 2013
    Posts
    1
    Location
    Surrey
    Tractor
    MF 135

    Default MF135 stuck in 3rd gear!

    I topping my field yesterday when my 1969 MF135 got stuck in 3rd gear. I could change from high to low ratio and even stop and start the machine but the gear stick would not move forward.

    I left it overnight to cool down and in the morning started it and after a couple of goes managed to shift it into neutral. All other gears seemed to work fine and (fluid levels are correct) so I tried 3rd again and it got stuck. After another cool-down period it freed and so I have parked it up and will not use 3rd for the time being.

    Does anyone have a suggestion as to what the cause is and what repair is necessary.

    Steve

  2. #2
    Platinum Member
    Join Date
    Dec 2012
    Posts
    613
    Location
    Williamstown Ontario Canada
    Tractor
    Kubota M7040 Nuffield 465

    Default Re: MF135 stuck in 3rd gear!

    Since no one has jumped in yet I will offer some comments derived from another brand of tractor which may give you some insight.
    If the top of the gearbox can be removed consider doing this. Inside you will find the selector forks which move the gears. The forks are on rails running the length of the gearbox.
    Where the bottom of the gear shift lever meets the rails (there will probably be 3) each rail will have a socket or hole that the gear shift lever fits into to be able to slide the rails and in doing so move the forks.
    Each rail socket will be at the same place when the transmission is in neutral. As you move the gear shift from side to side the bottom of the lever will engage different rail sockets.
    The rail sockets have their movements co-ordinated by ball bearings and springs which lock all rails except the one you have selected. As parts wear the co-ordination parts wear or break allowing the selector rails to move when they should not. A dragging clutch which keeps pressure on the gears can make these unwanted selector rails move. Because the rail moved without the bottom of the gear shift moving it, the gear shift is blocked from accessing the rail and you are stuck in gear. Another possibility when the co-ordination parts wear is that the transmission gets in 2 gears at the same time and is effectively locked.
    Dont be afraid to go at it. Have a camera to record the position of parts as you go.
    Dave M7040

  3. #3
    Gold Member Recoveryhill's Avatar
    Join Date
    Sep 2010
    Posts
    398
    Location
    St. Croix, Virgin Islands
    Tractor
    Kubota L3700SU

    Default Re: MF135 stuck in 3rd gear!

    Sorry for your problems.

    A 1969 model, assuming it has been well worked, is probably getting a bit worn in the gearbox department. There are only two possibilities, external and internal. If the linkage is all proper, clutch good, your problem is internal to the transmission, bearings, gears, forks, etc. I think you are going to need to open her up.

  4. #4
    Epic Contributor murphy1244's Avatar
    Join Date
    Nov 2011
    Posts
    20,106
    Location
    Ohio
    Tractor
    Kioti DK-40, MF-135, Ventrac 4500Y

    Default Re: MF135 stuck in 3rd gear!

    Repost this in the Massey Ferguson Vintage forum so the resident Guru's can find it. Welcome to TBN.
    Murph

  5. #5
    Gold Member Recoveryhill's Avatar
    Join Date
    Sep 2010
    Posts
    398
    Location
    St. Croix, Virgin Islands
    Tractor
    Kubota L3700SU

    Default Re: MF135 stuck in 3rd gear!

    Quote Originally Posted by murphy1244 View Post
    Repost this in the Massey Ferguson Vintage forum so the resident Guru's can find it. Welcome to TBN.
    Sound advice! There are a couple of threads there on MF stuck in gear topics along with a screwdriver fix, if that is your problem.

    Dave, for some reason I overlooked your post. Also good information and jives with what I saw in the MF threads.
    Last edited by Recoveryhill; 08-22-2013 at 11:26 AM. Reason: Add Dave Comment

  6. #6
    Veteran Member dieselcrawler's Avatar
    Join Date
    Jan 2008
    Posts
    1,547
    Location
    New Martinsville WV
    Tractor
    2013 JD 3005 2001 Kubota BX1800

    Default Re: MF135 stuck in 3rd gear!

    Our MF135 is 4 spd... have had issue with it getting stuck in 2-4 which are to the right side with 3rd in the middle and R and 1st on the left. Rather sure our issue is a worn shifter where it engages the shift rails as it pops out of the rail allowing the shifter into the neutral position but the 2-4 rail is still partially in gear.

    Your problem sounds very different... sounds like your shifter isn't flopping around like it's in neutral but fixed and clearly in the gear position but it just won't move. Sounds like something on the shift rail binding up.
    Greg AKA DieselCrawler
    2013 JD 3005 4x4 w/loader, 530 squirrel power diesel, with gravity power-reverser
    2000-ish Kubota BX1800HST

    Trucks:
    1999 F250 4x4 7.3L diesel 6spd. Sidelined due to motor issues
    2000 F350 4x4, 7.3L diesel, auto, daily driver
    2000 Excursion 4x4 7.3L diesel, wife's ride
    84 Chevy K-30 turbo diesel farm truck, play truck, one ton running gear, locked up, on 39.5" boggers,
    Redheaded wife, 6 kids, buncha rabbits, 5 horses/ponies, some cats, 4 dogs

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