C36 Gearbox HELP!!!

Discussion in 'Engine' started by sheraz, Sep 15, 2008.

  1. sheraz

    sheraz New Member

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    Sep 15, 2008
    Hi all im having major problems with my c36 and specifically with the gearbox. Have had gearbox's off three company's and all have turned out to be faulty. I have a box off the third company still but my mechanics are saying that the cast is too short although it looks like the right box to me???!!! I am not sure if the mechanics know what they are doing fully I am taking the car from his garage and taking it elsewhere.

    Anyways i was just wondering if any1 knew how many 4 speed box's there are for a C36 up until the 5 speed was introduced. My C36 is a 1995 model (4speed) and the box that is supposedly wrong has the number 124.271.24.01 on it and also 31.51944.00 on it (maybe the cast no??)

    I have pics of a box that fix the car which was faulty and the box i currently have, although i do not have the original box from the car or its part numbers. I tried to upload pics on here but couldnt because they were too big. If anyone can help please email me and I will send the pics.


    Thanks if any1 can help it is much appreciated.
    sherazanwar1@hotmail.com
     
  2. Alps

    Alps MB Club Veteran

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    4 -speed boxes were suppossed to be better than the 5-speed in terms of reliability. most 4-speed boxes will fit straight on, although if its not a c36 box, then the ratios will be different.

    i would take it to an indi who has replaced mercedes boxes before, I find it hard to believe you have had 3 boxes which are faulty.... you probably could have bought a new one for the cost.

    I replaced mine 4 years ago with a new one from MB, along with the controller, just make sure the oil level is correct, re-check it after a short drive.

    good luck!
     
  3. Buggerlugs

    Buggerlugs Hardcore MB Enthusiast

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    Hi Sheraz,

    What was the original fault? Does it have the same fault now? Do you still have the original gearbox?
     
  4. OP
    OP
    sheraz

    sheraz New Member

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    A new box from mercedes is £3000, not an option. I have had a faulty box that failed due to combination of torque converter/box failure. Next box ran 4 a few days but was makin a noise in reverse. on trying to see what was wrong box went. Next box had a faulty torque converter. Box i currently have now has a cast length which is too short so does not fit properly although the box looks the same. it has a different part no to what my car came with. I also had a 4 spd box b4 which had different sensor connections on it and have also been sent the completely wrong box before!! (5 speed 1 i think).

    original box fault was that it was leaking oil and was discovered that a sensor had popped out/ was damaged. on replacing the sensor the box pressure was always too high bursting all the seals. box could not be reconditioned.
     
  5. Leemc2008

    Leemc2008 Hardcore MB Enthusiast

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    Stick a C280 Manual gearbox on it.. and have a 5 speed manual. :)
     
  6. Alps

    Alps MB Club Veteran

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    fyi - 5 spd c36 box was £1600 from MB surprised the 4 spd one is almost twice the price!

    you need to go to a proper indy, and buy a box from a specialist gearbox reconditioners who will guarentee it.
     
  7. Buggerlugs

    Buggerlugs Hardcore MB Enthusiast

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    Sheraz,

    Sounds like you should have a 722.3xx series gearbox and you've been fobbed off with a 722.4xx which accounts for the difference in maincase length. The 722.3xx is the beefed up version for high power cars, whereas the 722.4xx is found in "normal" cars.

    Problem is Sheraz that unless you have the original gearbox you're gonna struggle with this one. The only way that the original gearbox can't be salvaged is if the gearbox casing is damaged in some way, if it's not, then it can be fixed and I would think that a good gearbox specialist is gonna charge you between £600 - 850 + VAT to rebuild a loose unit.

    Take Alps advice and find yourself a good gearbox rebuilder, that's all you can do if you want the car to work properly again. Good luck.
     
  8. OP
    OP
    sheraz

    sheraz New Member

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    Thanks guys for the info, still deciding what to do, will let u know what happens.
     
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