Results 1 to 8 of 8

Thump in my auto trans when i hit the gas real hard! Why?

This is a discussion on Thump in my auto trans when i hit the gas real hard! Why? within the Automatic Transmission forums, part of the Drivetrain category; I just dropped an Ls6 (zo6) motor in My 99 SS that was an Ls1 and if i down shift ...

  1. #1
    Member mglangley21's Avatar
    Join Date
    Mar 2007
    Location
    North Carolina
    Posts
    184

    Red
    1999 Camaro SS(LS6 Swap)

    Thump in my auto trans when i hit the gas real hard! Why?

    I just dropped an Ls6 (zo6) motor in My 99 SS that was an Ls1 and if i down shift at about 60 mph into 2nd gear to take off with my automatic it makes a thump under the car like an transmission mount is broken but it's not? why is this and what can i do about it? Thanks alot!!

  2. #2
    ummmmm OK..... MORBIDVISIONS's Avatar
    Join Date
    Jun 2007
    Location
    south
    Posts
    16

    black
    98 z28

    I am no expert but sometimes even if a tranny mount looks ok and is not ripped it still can have small tears in it or just be weak from wear. If you take a pry bar and gently pry under the trans-if it moves its the mount.

  3. #3
    down with the lot lizards blackhawk01's Avatar
    Join Date
    Dec 2006
    Location
    Pensacola
    Age
    28
    Posts
    1,565

    Red
    2001 Camaro SS A4

    tranny mount..trust me

  4. #4
    Just me Y2KPewterSS's Avatar
    Join Date
    Nov 2006
    Location
    Broken Arrow, OK
    Age
    42
    Posts
    23,353

    Pewter metallic
    2000 Camaro SS

    My guess would be tranny mount as well.
    CCW SP 500s 18x10 275/35 18x11 295/35
    SLP CME with GMMG style catback
    Painted manta stripe

    Quote Originally Posted by konigandy6 View Post
    I'd rather be bi than full homo!!!!

  5. #5
    Retired NOT tired SteveC's Avatar
    Join Date
    Jul 2005
    Location
    Poway, Ca
    Posts
    1,126

    SOM
    2001 Z28 (Sara)

    Replace the stock tranny mount with a prothane poly unit, no more thump.

    SteveC

  6. #6
    Junior Member
    Join Date
    Jul 2007
    Location
    Baltimore MD.
    Age
    50
    Posts
    4

    flat black
    1994 pontiac firebird

    weld it

    LOL yes had same problem we welded it to cross member,,but we are racing on round dirt track

  7. #7
    Senior Member Rhinohuey's Avatar
    Join Date
    Mar 2007
    Location
    Glendale, AZ
    Posts
    1,460

    Black
    1999 Trans Am

    +1 +1 +1
    I JUST replaced mine about a week ago. I had the same exact problems you describe.

  8. #8
    Senior Member Rhinohuey's Avatar
    Join Date
    Mar 2007
    Location
    Glendale, AZ
    Posts
    1,460

    Black
    1999 Trans Am

    Quote Originally Posted by Pew View Post
    LOL yes had same problem we welded it to cross member,,but we are racing on round dirt track
    Thats one way to keep it from thumping.

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. This auto listing is hard to describe...
    By predator in forum Almost Anything Goes
    Replies: 6
    Last Post: 02-10-2011, 05:04 AM
  2. Replies: 14
    Last Post: 08-25-2010, 06:57 AM
  3. Noise under hard acceleration-auto tranny related
    By Zapper2003 in forum General Help
    Replies: 3
    Last Post: 03-14-2008, 06:31 PM
  4. real cars grand theft auto san andreas
    By Bandit1 in forum Almost Anything Goes
    Replies: 5
    Last Post: 07-17-2007, 12:34 PM
  5. Real life grand theft auto
    By ss~zoso~ss in forum Multimedia Section
    Replies: 39
    Last Post: 03-04-2007, 01:56 PM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •