Advertisement
If you have a new account but are having problems posting or verifying your account, please email us on hello@boards.ie for help. Thanks :)
Hello all! Please ensure that you are posting a new thread or question in the appropriate forum. The Feedback forum is overwhelmed with questions that are having to be moved elsewhere. If you need help to verify your account contact hello@boards.ie
Please note that it is not permitted to have referral links posted in your signature. Keep these links contained in the appropriate forum. Thank you.

https://www.boards.ie/discussion/2055940817/signature-rules
Hi there,
There is an issue with role permissions that is being worked on at the moment.
If you are having trouble with access or permissions on regional forums please post here to get access: https://www.boards.ie/discussion/2058365403/you-do-not-have-permission-for-that#latest

Automatic gearbox speed not changing

  • 09-07-2015 12:39am
    #1
    skj
    Registered Users, Registered Users 2 Posts: 17 ✭


    Mercides Benz A140 Automatic Gear box 2001 model, This car has done only 26 K miles.

    the problem is it will drive only at 30km/hr the max. speed.

    and when we engage drive to gear, car jerks with a bank. and speed wont go above 30 km/hr . gear shifting is not happening .

    does any one know what would be the issue.

    thanks


Comments

  • #2
    newbie2
    Registered Users, Registered Users 2 Posts: 2,477 ✭✭✭newbie2


    clutch is buggered ?


  • #3
    rex-x
    Registered Users, Registered Users 2 Posts: 1,893 ✭✭✭rex-x


    newbie2 wrote: »
    clutch is buggered ?

    On an automatic? :confused:


  • #4
    biko
    Registered Users, Registered Users 2 Posts: 81,220 ✭✭✭✭biko


    Check and maybe swap transmission fluid and read this
    http://www.benzworld.org/forums/w210-e-class/1615327-auto-transmission-fault-not-changing-gears.html


  • #5
    newbie2
    Registered Users, Registered Users 2 Posts: 2,477 ✭✭✭newbie2


    rex-x wrote: »
    On an automatic? :confused:

    Wife drives a MMT - they have a clutch


  • #6
    colm_mcm
    Registered Users, Registered Users 2 Posts: 73,520 ✭✭✭✭colm_mcm


    newbie2 wrote: »
    Wife drives a MMT - they have a clutch

    That's an automated manual rather than a conventional automatic.


  • Advertisement
  • #7
    gctest50
    Registered Users, Registered Users 2 Posts: 9,605 ✭✭✭gctest50


    rex-x wrote: »
    On an automatic? :confused:

    ???

    automatics have a few clutches - thats how they work ?




    0a817ff0437ec95c6229cf0455dfd039.md.jpg


  • #8
    gctest50
    Registered Users, Registered Users 2 Posts: 9,605 ✭✭✭gctest50


    if its been "hanging on" to first gear for a while it can be a sign of one of the clutches failing on some of them

    if someone revved it hard for ages in neutral/park AFTER it had been in any gear one clutch can fail on some of them

    ( eg daft NCT test playing with it before revving it )


  • #9
    MercMad
    Registered Users, Registered Users 2 Posts: 4,266 ✭✭✭MercMad


    You will need to have the codes read by someone with a suitable tester, that includes transmissions. If this car uses the 722.6/722.6 gearbox then your issue could he the conductor plate sandwiched between the clutches and the valve body bits basically the electronics of the transmission. Mercs can lock you in the last known good gear or just one gear either electrically or hydraulically when the fault occurs. If you turn it off and on again does it reset ? Where are you based ?


Advertisement