1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

Metal on metal grinding noise from gearbox ?

Discussion in 'Engine, Drivetrain, Fuel and Exhaust' started by Jonny Moore, Jan 1, 2013.

  1. Jonny Moore

    Jonny Moore Senior Member

    Messages:
    118
    Likes Received:
    0
    Joined:
    Mar 25, 2012
    Location:
    London
    Your Mercedes:
    W212 E250cdi 2011/61
    I've recently had problems with my gearbox always wanting to be in the wrong gear, and suffered fuel economy loss as a result. I've had the gearbox reset (Star)and software updated which made no difference.

    After reading quite a few websites I think the torque converter is locking up, but yesterday it started to make a metal on metal noise, sounds awful and is audible at all speeds and is still there when coasting in neutral....any ideas folks?
     
  2. st4

    st4 Banned

    Messages:
    8,624
    Likes Received:
    2
    Joined:
    Apr 6, 2008
    Location:
    Sunny Scotland
    Your Mercedes:
    Disqualified driver
    You really need to get that looked at. I'd wager there is not enough ATF in there, but I suspect you could be looking at a whole new box. Sorry,
     
  3. television

    television Always remembered RIP

    Messages:
    164,074
    Likes Received:
    310
    Joined:
    Mar 14, 2005
    Location:
    Daventry
    Your Mercedes:
    2002 SL500, 216 CL500, all fully loaded
    There are plenty of other things it could be, it may not be the gearbox,,,its all encased.
     
  4. alexanderfoti

    alexanderfoti MBO Forum Supporter Authorised Forum Supporter

    Messages:
    12,634
    Likes Received:
    2,880
    Joined:
    Mar 25, 2010
    Location:
    Tonbridge
    Your Mercedes:
    W221 S65 AMG - W204 C63 AMG + Various other MB's
    Yeah im thinking maybe a wheel bearing has gone just to be a pain :)
     
  5. Steve@Avantgarde

    Steve@Avantgarde Forum Supporter Authorised Forum Supporter

    Messages:
    6,825
    Likes Received:
    1,003
    Joined:
    Dec 8, 2009
    Location:
    Bristol/Somerset
    Your Mercedes:
    C220CDI AMG Line Premium, SLR McLaren Roadster, SL55 & C32AMG
    Sounds like the drum has split in the gearbox. I would be dropping the sump off ASAP for a closer look but it doesnt sound good.
     
  6. OP
    Jonny Moore

    Jonny Moore Senior Member

    Messages:
    118
    Likes Received:
    0
    Joined:
    Mar 25, 2012
    Location:
    London
    Your Mercedes:
    W212 E250cdi 2011/61
    This morning I had to take a customer to the airport, 50 miles. The noise is worse at slower speeds and I'm losing at least 10 mpg. Feels like I have the handbrake on.

    It's definitely something to do with the box as when I put it into neutral the noise changes note slightly.

    Also when I knock it out of gear from say 50mph the rpm drops from around 1700rpm to Idle (obviously)..but when I put it back into gear at the same speed the rpm will only reach 1100rpm....then with very gentle throttle the rpm will flick straight back up instantly. Is that normal?
     
  7. mattkh

    mattkh Senior Member

    Messages:
    1,589
    Likes Received:
    41
    Joined:
    Aug 2, 2006
    Location:
    England
    Your Mercedes:
    W168 1999 1.6
    Hi
    Is it a 722.6 gearbox ?
     
  8. OP
    Jonny Moore

    Jonny Moore Senior Member

    Messages:
    118
    Likes Received:
    0
    Joined:
    Mar 25, 2012
    Location:
    London
    Your Mercedes:
    W212 E250cdi 2011/61
    No idea matt:Oops:
     
  9. st4

    st4 Banned

    Messages:
    8,624
    Likes Received:
    2
    Joined:
    Apr 6, 2008
    Location:
    Sunny Scotland
    Your Mercedes:
    Disqualified driver
    It will be on a 2008 E220cdi
     
  10. OP
    Jonny Moore

    Jonny Moore Senior Member

    Messages:
    118
    Likes Received:
    0
    Joined:
    Mar 25, 2012
    Location:
    London
    Your Mercedes:
    W212 E250cdi 2011/61
    Center prop shaft bearing being replaced tomorrow....fingers crossed it's that !
     
  11. OP
    Jonny Moore

    Jonny Moore Senior Member

    Messages:
    118
    Likes Received:
    0
    Joined:
    Mar 25, 2012
    Location:
    London
    Your Mercedes:
    W212 E250cdi 2011/61
    Center prop bearing it was. Thankfully !...Thanks Ian (Star-Caversham)
     
  12. television

    television Always remembered RIP

    Messages:
    164,074
    Likes Received:
    310
    Joined:
    Mar 14, 2005
    Location:
    Daventry
    Your Mercedes:
    2002 SL500, 216 CL500, all fully loaded
    I did not think it could be from within the box,,, not too bad a job doing the center bearing
     

Share This Page