Results 1 to 17 of 17

New Tranny mount problem

This is a discussion on New Tranny mount problem within the Drivetrain forums, part of the LSx Technical Help Section category; I just installed a new tranny mount from energy suspension seen here http://www.lmperformance.com/3118/8.html I installed it today and now I ...

  1. #1
    Member firemedic0135's Avatar
    Join Date
    Jun 2007
    Location
    East Texas
    Age
    42
    Posts
    195

    Arctic White
    2000/Trans Am

    New Tranny mount problem

    I just installed a new tranny mount from energy suspension seen here http://www.lmperformance.com/3118/8.html

    I installed it today and now I think I may have gotten my pinion out of allignment.We had to jack up the tranny about 2" to get the crossmember back on due to the increased heighth of the new mount.I shutters a bit now when I go WOT and is really noticable between 60-100 mph never gone much further here on the local HWY
    Should I just deal with it until I lower the car which may be sometime from now or just install a OEM model?
    Thanks

  2. #2
    The Bandit Wesman's Avatar
    Join Date
    Apr 2006
    Location
    NJ
    Posts
    4,033

    SGM
    1998 Trans Am WS6

    You basically put the pinion angle back to where its supposed to be at stock. The Poly mounts aren't supposed to be any larger than the stock mount, I know mine wasn't. If your old mount was that bad, then you may have damaged the pinion seal and pinion bearing, which will require taking the rear apart and replacing them.

    Changing the pinion angle alone should not cause it to vibrate or shudder.

  3. #3
    Member firemedic0135's Avatar
    Join Date
    Jun 2007
    Location
    East Texas
    Age
    42
    Posts
    195

    Arctic White
    2000/Trans Am

    yeah the old mount was shot ,and came out in two pieces.

    how can I tell if the pinion is ruined now,or the seal?
    I guess look for leaks huh?

  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

    Is your driveshaft possibly out of balance?
    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
    The Bandit Wesman's Avatar
    Join Date
    Apr 2006
    Location
    NJ
    Posts
    4,033

    SGM
    1998 Trans Am WS6

    Quote Originally Posted by firemedic0135 View Post
    yeah the old mount was shot ,and came out in two pieces.

    how can I tell if the pinion is ruined now,or the seal?
    I guess look for leaks huh?
    Pretty much, you can also check for play in the pinion shaft by disconnecting the driveshaft at the rear and moving the pinion shaft itself to check for play.

    If you can move it around at all, time for new bearings/seal.

  6. #6
    Member firemedic0135's Avatar
    Join Date
    Jun 2007
    Location
    East Texas
    Age
    42
    Posts
    195

    Arctic White
    2000/Trans Am

    Quote Originally Posted by Y2KPewterSS View Post
    Is your driveshaft possibly out of balance?
    if the shaft were out of balance would there have been shutter before replacing the tranny mount?
    another theory I have in mind is that since the mount was broken prolly since I bought the car was I just not feeling the shutter due to the connection between the tranny and crossmember being broken?
    I dont know just thinking out loud.
    I will take it to the shop and get it on a lift this week to try and figure this thing out if I cant do it here.
    Thanks again and keep the ideas coming

  7. #7
    Just me Y2KPewterSS's Avatar
    Join Date
    Nov 2006
    Location
    Broken Arrow, OK
    Age
    42
    Posts
    23,353

    Pewter metallic
    2000 Camaro SS

    Quote Originally Posted by firemedic0135 View Post
    if the shaft were out of balance would there have been shutter before replacing the tranny mount?
    another theory I have in mind is that since the mount was broken prolly since I bought the car was I just not feeling the shutter due to the connection between the tranny and crossmember being broken?
    I dont know just thinking out loud.
    I will take it to the shop and get it on a lift this week to try and figure this thing out if I cant do it here.
    Thanks again and keep the ideas coming
    My driveshaft idea was just a guess. Most likely you would have felt the shutter prior to the tranny mount swap if it was the driveshaft. Wesman probably has you on the right track with his suggestions. If what Wesman suggested isn't the problem, I would consider having the DS balanced/checked out. Its fairly cheap to have done.

  8. #8
    Member fast enough Z28's Avatar
    Join Date
    Nov 2006
    Location
    Rowlett,Tx.
    Age
    35
    Posts
    659

    silver
    98 camaro z28 m6

    How bad is it shaking. cause I've never heard of one of those mounts not vibrating when installed, since it is a poly it doesn't give. Just normal effects!

  9. #9
    Member firemedic0135's Avatar
    Join Date
    Jun 2007
    Location
    East Texas
    Age
    42
    Posts
    195

    Arctic White
    2000/Trans Am

    Quote Originally Posted by fast enough Z28 View Post
    How bad is it shaking. cause I've never heard of one of those mounts not vibrating when installed, since it is a poly it doesn't give. Just normal effects!
    It is not a terrible shutter just noticable at heavy throttle.
    I just want to be sure it is normal and not something else that needs attn.
    Thanks

  10. #10
    Member fast enough Z28's Avatar
    Join Date
    Nov 2006
    Location
    Rowlett,Tx.
    Age
    35
    Posts
    659

    silver
    98 camaro z28 m6

    Quote Originally Posted by firemedic0135 View Post
    It is not a terrible shutter just noticable at heavy throttle.
    I just want to be sure it is normal and not something else that needs attn.
    Thanks
    Mine does some but only at low speeds at heavy throttle. Your driveshaft is a one piece correct. If not switch to a one piece. Good Luck!

  11. #11
    Senior Member mrr23's Avatar
    Join Date
    Jul 2005
    Location
    orlando, fl
    Posts
    7,134

    dark bowling green
    2000 corvette

    it's the poly mount causing it. what you can do to reduce this is remove the steel plate it comes with. i didn't put mine in because of this.

  12. #12
    Senior Member mrr23's Avatar
    Join Date
    Jul 2005
    Location
    orlando, fl
    Posts
    7,134

    dark bowling green
    2000 corvette

    Quote Originally Posted by Wesman View Post
    Changing the pinion angle alone should not cause it to vibrate or shudder.
    it can. if the angle is far enough off, the u-joint will be binding.

  13. #13
    Member fast enough Z28's Avatar
    Join Date
    Nov 2006
    Location
    Rowlett,Tx.
    Age
    35
    Posts
    659

    silver
    98 camaro z28 m6

    Quote Originally Posted by mrr23 View Post
    it's the poly mount causing it. what you can do to reduce this is remove the steel plate it comes with. i didn't put mine in because of this.
    You didn't put the steel plate in or the mount?

  14. #14
    Senior Member mrr23's Avatar
    Join Date
    Jul 2005
    Location
    orlando, fl
    Posts
    7,134

    dark bowling green
    2000 corvette

    Quote Originally Posted by fast enough Z28 View Post
    You didn't put the steel plate in or the mount?
    no i did not put the steel plate that comes with the mount. it's called a preload plate. it makes the mount firmer by compressing it. this, in turn, will cause more transmittal of engine and trans vibrations throughout the car.

  15. #15
    Member fast enough Z28's Avatar
    Join Date
    Nov 2006
    Location
    Rowlett,Tx.
    Age
    35
    Posts
    659

    silver
    98 camaro z28 m6

    Quote Originally Posted by mrr23 View Post
    no i did not put the steel plate that comes with the mount. it's called a preload plate. it makes the mount firmer by compressing it. this, in turn, will cause more transmittal of engine and trans vibrations throughout the car.
    Alright thanks!

  16. #16
    Member firemedic0135's Avatar
    Join Date
    Jun 2007
    Location
    East Texas
    Age
    42
    Posts
    195

    Arctic White
    2000/Trans Am

    think I will try to remove that plate before going back OEM with another.
    I put it on cause the instuctions said "IS NOT OPTIONAL" and I am just a sucker I guess LOL
    Thats what I get for reading the instuctions HUH?

  17. #17
    The Bandit Wesman's Avatar
    Join Date
    Apr 2006
    Location
    NJ
    Posts
    4,033

    SGM
    1998 Trans Am WS6

    Quote Originally Posted by mrr23 View Post
    it can. if the angle is far enough off, the u-joint will be binding.
    That would be one hell of an oversized mount - i.e., the wrong one for the car.

    Like I said, my Energy Suspension Poly mount fit in perfectly, just like stock. Maybe other brands don't fit as well though.

Thread Information

Users Browsing this Thread

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

Similar Threads

  1. 01 M6 Tranny Mount..
    By CamaroFan71 in forum Drivetrain
    Replies: 14
    Last Post: 12-20-2008, 08:13 PM
  2. Bad tranny mount?
    By Rhinohuey in forum Manual Transmission
    Replies: 7
    Last Post: 07-27-2007, 05:57 PM
  3. Bad tranny mount???
    By Rhinohuey in forum Firebird / WS6
    Replies: 22
    Last Post: 07-23-2007, 11:37 PM
  4. Need a good T56 (LS1) Stock Tranny mount & Torque arm mount..
    By 1slosnake in forum Parts Wanted / Trade
    Replies: 2
    Last Post: 06-19-2006, 04:04 PM
  5. Need a good T56 (LS1) Stock Tranny mount & Torque arm mount..
    By 1slosnake in forum Parts Wanted / Trade
    Replies: 1
    Last Post: 06-13-2006, 06:24 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
  •