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Thread: grinding noise

  1. #1
    Join Date
    Mar 2005
    Location
    dublin, ca
    Posts
    479

    Default grinding noise

    Hi i just noticed when i accelerate from a stop i feel this grinding noise. it comes from behind the drivers seat (i think) so im wondering coudl that be the dif? or is just a normal problem w/ a m50 transmition?

  2. #2
    Join Date
    May 2004
    Location
    Japan
    Posts
    9,270

    Default

    Check
    engine mounts
    trans mounts
    center bearing

  3. #3
    Join Date
    Oct 2004
    Location
    Honolulu
    Posts
    3,105

    Default The diff would whine

    at a pitch that would get higher as you accelerate, and quiet down when you coast.


    Vee ave vays of dealing vid your kind...........

  4. #4
    Join Date
    Mar 2005
    Location
    dublin, ca
    Posts
    479

    Default

    i know what a centerberring feels like when it goes out and its not that because when i apply power in seccond theres no vibration... its only from like 0-15mph
    how do i check tranny mounts and engine mounts? if i repplace should i get uuc ones? but i have a auto tranny so i don't think they will help

  5. #5
    Join Date
    Mar 2005
    Location
    dublin, ca
    Posts
    479

    Default

    my firends car had the center berring and trans mounts go out and i kno how that feels. it goes completely away at 10 to 15 mph its like that initial accalaration. i think its heat related because in the morning when i go to school. i leave my street and am yet to feel it or hear it then but after that during the day it happens. that leads me to bieleve possibly no fluid in the diff but i don't know

  6. #6
    Join Date
    May 2004
    Location
    Japan
    Posts
    9,270

    Default

    They are oil filled. So you can see oil 'moisture outside.

    If they are defective, the engine and the trans are 'hanging' in a different angle. This can cause also the drive sgaft to be out of the right angle and then you could get such noise.
    How to change, see Gale's page. Link on my website.

    Defective engine mounts also cause vibration in idle.

  7. #7
    Join Date
    Mar 2005
    Location
    dublin, ca
    Posts
    479

    Default

    alright ill put my car up on the lift at school and give it a look. is there a way to check the motor mounts?

    BTW thanks for all of your help with my car

  8. #8
    Join Date
    May 2004
    Location
    Japan
    Posts
    9,270

    Default

    Check for oil outside, and cracks. Sometimes they are worne so that metal touches metal.
    I changed both engine and trans mounts last year. Engine idle much smoother and trans shifting is smoother (at least I have that feeling).
    http://www.nmia.com/~dgnrg/page_10.htm

  9. #9
    Join Date
    Jan 2004
    Location
    NYC
    Posts
    479

    Default

    maybe one of your brake calipers is frozen... does it happen when you hit the brakes too?

  10. #10
    Join Date
    Mar 2005
    Location
    dublin, ca
    Posts
    479

    Default

    no i just changed the fronts and took the rear pads off and inspected them... so not the brakes

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