shimmy in whole car - GM Forum - Buick, Cadillac, Olds, GMC & Pontiac chat

1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

shimmy in whole car

Reply

 
 
 
Old 02-12-2004, 10:06 AM
  #1  
Junior Member
Thread Starter
 
Join Date: Feb 2004
Location: montgomery ill
Posts: 9
Thanks: 0
Thanked 0 Times in 0 Posts
therealstonecold1970 is on a distinguished road
Default shimmy in whole car

changed left front transmission mount and left rear trans mount and passenger belt motor mount and put four tires on car and now i have a shimmy or vibration that happens only when i have pressure on accelrater. if i am crusing down the street with foot off throttle no shimmy but as soon as i touch gas pedal i get bad shimmy rechecked all sub frame bolts and motor mount bolts any help would be appericated my wife is dying to get her car back
therealstonecold1970 is offline  
Reply With Quote
Old 02-12-2004, 10:28 AM
  #2  
Senior Member
True Car Nut
 
GAMEOVER's Avatar
 
Join Date: Aug 2003
Location: Racine Wi
Posts: 5,146
Thanks: 0
Thanked 0 Times in 0 Posts
GAMEOVER is on a distinguished road
Default

how is all of your suspension parts?,tires balanced? Lugnuts are tight? Recheck your torque on all the cradle bolts and everything you had taken a part?
GAMEOVER is offline  
Reply With Quote
Old 02-12-2004, 12:12 PM
  #3  
Senior Member
Posts like a Camaro
 
Join Date: Jan 2004
Posts: 1,166
Thanks: 0
Thanked 1 Time in 1 Post
mkaake is on a distinguished road
Default

when you're putting gas on the throttle on the street (when you're getting the shimmies), put the car in neutral, and then put gas on it again - you'll find out pretty quick if it'* tranny or otherwise... then you can work from there.

just my .02...

matt
mkaake is offline  
Reply With Quote
Old 02-12-2004, 09:06 PM
  #4  
Member
Posts like a V-Tak
 
Join Date: Jan 2004
Posts: 71
Thanks: 0
Thanked 0 Times in 0 Posts
helikon is on a distinguished road
Default

It may be that the drive axles are out of alignment because the engine moved while jacking it around while changing mounts and/or if the engine was raised while the car was not on a level surface.Don't ask me how I know this can happen.Something related to a "dumbsh*t award".Check to see if the engine moves alot when in gear and given some throttle and causes the engine to drive axle alignment to change.Missing,broken or loose mounts can do this.Butt the car up against a concrete parking abutment,apply emergency brake and look for engine movement while somebody slowly applies throttle.
helikon is offline  
Reply With Quote
Old 02-12-2004, 11:38 PM
  #5  
Junior Member
Thread Starter
 
Join Date: Feb 2004
Location: montgomery ill
Posts: 9
Thanks: 0
Thanked 0 Times in 0 Posts
therealstonecold1970 is on a distinguished road
Default update

talked to some trans specialist and they recommended replacing axles and loosen subframe and reattach it evenly and it should fix it say r/* axle is misaligned
man i sure hope so another question on same car popcorn noise while accelerating exhaust doughnut moving?? sound right
therealstonecold1970 is offline  
Reply With Quote
Old 02-12-2004, 11:54 PM
  #6  
Member
Posts like a V-Tak
 
Join Date: Jan 2004
Location: Shelton, CT
Posts: 48
Thanks: 0
Thanked 0 Times in 0 Posts
L67Riviera is on a distinguished road
Default

There is a TSB on a shimmy at about 37 mph and above. Origionally, GM said to replace the back transmission mount but as time went on, technicians were finding that this dosent cure the problem...thus GM came to realize that is a torque converter issue.. which you seem to have narrowed it down to.. You can go to your dealer and inquire about this but most dealers are lazy and play games..I work at one and see first hand. According to the TSB, you need to replace your eprom (95 and below) with an "updated" one. However if you have an upgraded performance chip, there is a plug in trans tuner that will take care of the problem.. I had the same bull to deal with. Hope this helps.
L67Riviera is offline  
Reply With Quote
Old 02-14-2004, 06:27 PM
  #7  
Junior Member
Thread Starter
 
Join Date: Feb 2004
Location: montgomery ill
Posts: 9
Thanks: 0
Thanked 0 Times in 0 Posts
therealstonecold1970 is on a distinguished road
Default update again

update transmission will be going in next weekend because it is shot
metal and clutch parts in trans pan but still thanks for the help
therealstonecold1970 is offline  
Reply With Quote
Old 02-23-2004, 09:34 AM
  #8  
Junior Member
Thread Starter
 
Join Date: Feb 2004
Location: montgomery ill
Posts: 9
Thanks: 0
Thanked 0 Times in 0 Posts
therealstonecold1970 is on a distinguished road
Default update

another update changed all four motor mounts/ transmission mounts bought and installed 4 new tires replaced transmission and still have the shimmy while accelerating could use some more insight from anybody that has seen this. and no codes either in trans or abs or engine so what also has been replaced is both axles.
therealstonecold1970 is offline  
Reply With Quote
Old 02-23-2004, 10:33 AM
  #9  
Senior Member
Expert Gearhead
 
Join Date: Dec 2002
Location: Mississauga, Ontario
Posts: 20,893
Thanks: 0
Thanked 1 Time in 1 Post
Jim W is on a distinguished road
Default

It would really help if we know the yea, mileagr and trim level or your car. Please add it to your signature and more specific information to your Bonneville will be readily available. Click on Profile at the top right of your window, scroll to the Signature box and add this very important information.

Thanks
Jim W is offline  
Reply With Quote
Old 02-23-2004, 10:56 AM
  #10  
Junior Member
Posts like a Ricer Type-R
 
Join Date: Aug 2002
Posts: 11
Thanks: 0
Thanked 1 Time in 1 Post
willwren is on a distinguished road
Default

I don't think it has anything to do with the trans or mounts (or axles). Check to be sure you don't have an ignition problem first. Sounds very much like you do.
willwren is offline  
Reply With Quote

Thread Tools
Search this Thread
Quick Reply: shimmy in whole car


Contact Us Archive Advertising Cookie Policy Privacy Statement Terms of Service

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.