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Thread: Kah-Clunk from the back of the car every time I let off the gas

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  1. #1

    Kah-Clunk from the back of the car every time I let off the gas

    As posted, whenever I let on the gas, or get on the clutch, the back of the car gives this Kah-Clunk sound. It takes about 1-2 seconds after letting off the gas.

    I'm thinking some part has gone bad, any ideas?
    Last edited by Fried_Chicken; 03-13-2019 at 03:09 PM.

  2. #2
    Rear diff bushing

    Sent from my Pixel 2 XL using Tapatalk
    2003 Blue ZHP Sedan @ 195k
    Paint chips | Current MIL: P0420 | Airbag Light | Poorly Sprayed Black Style 135s |Ugly Alcantara Steering Wheel | Trunk Squeak | Faded Shadowline Trim
    This car is not a peach. It is a precision instrument, and will be used as such.

  3. #3
    Quote Originally Posted by DeathTrap View Post
    Rear diff bushing

    Sent from my Pixel 2 XL using Tapatalk
    There are 2 of them?

  4. #4
    Quote Originally Posted by Fried_Chicken View Post
    There are 2 of them?
    Technically three, but the one you need to check is the large one in the rear of the diff. Mine looks like this currently. Hopefully I can replace it this weekend without too much drama.

    Sent from my Pixel 2 XL using Tapatalk
    2003 Blue ZHP Sedan @ 195k
    Paint chips | Current MIL: P0420 | Airbag Light | Poorly Sprayed Black Style 135s |Ugly Alcantara Steering Wheel | Trunk Squeak | Faded Shadowline Trim
    This car is not a peach. It is a precision instrument, and will be used as such.

  5. #5
    Join Date
    Oct 2016
    Location
    Vermont
    Posts
    462
    Keep hoping... ; )
    2004 BMW 330i ZHP (50k miles), Jet Black with black leather, MFactory LSD (3.38) with Z4 cover, 18"x8.5" ET38 APEX Arc-8's (Anthracite) with 245/40 Michelin PSS', Koni Sports with factory springs and front and rear reinforcement plates, Shark Injector, TMS under-driven pulleys (water & steering), CDV delete, TMS CF strut brace, K&W CAI, GAS DISA rebuild, TMS pedals, Wheelskins steering wheel cover, roller tray center console, and WeatherTech floor and cargo mats

  6. #6
    +1 for Rear Diff Bushing. I need to tackle it this summer aswell...

    Sent from my ZTE A2017U using Tapatalk

  7. #7
    I'm doing all three. I got the back one out; it's sitting overnight, I'll do the front ones too while I have the diff out.

    God bless youtube videos.

  8. #8
    Join Date
    Oct 2016
    Location
    Vermont
    Posts
    462
    Did you use a special tool?
    2004 BMW 330i ZHP (50k miles), Jet Black with black leather, MFactory LSD (3.38) with Z4 cover, 18"x8.5" ET38 APEX Arc-8's (Anthracite) with 245/40 Michelin PSS', Koni Sports with factory springs and front and rear reinforcement plates, Shark Injector, TMS under-driven pulleys (water & steering), CDV delete, TMS CF strut brace, K&W CAI, GAS DISA rebuild, TMS pedals, Wheelskins steering wheel cover, roller tray center console, and WeatherTech floor and cargo mats

  9. #9
    Join Date
    Jun 2011
    Location
    VA/DC
    Posts
    14,394
    Quote Originally Posted by Reasoned1 View Post
    Did you use a special tool?
    I have a Koch tool thatís available for rent that helps with the big one. Also RTABs. It wonít work for the two small diff bushings unless you drop the subframe.

  10. #10
    Standard bearing/bushing tools

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