Thread: Vibration in passenger front

Results 1 to 10 of 10
  1. #1 Vibration in passenger front 
    SE Level Member ablank37821's Avatar
    Join Date
    Jun 2012
    Location
    Newport, TN
    Posts
    9
    Thanks (Received)
    0
    Likes (Received)
    0
    Dislikes (Received)
    0
    Alright to start this is a 2000 GP GT N/A, I recently had to replace both front rotors (they were toast), it solved the vibration I was getting while braking in the driver side front wheel but the vibration has persisted in the passenger front. Now what I find odd is the vibration isn't always there it seems to come and go from day to day, this issue also presents itself throughout driving ranges and what I mean by that is the vibration is there while braking or not at all speeds, it almost feels as though the passenger side tire is ready to fly off but as far as I can tell the hub is still good, the tire is balanced, and the lugs are not loose. Another thing worth noting is at low speeds when braking I can feel the brakes grab and give a little then grab again. The vibration/sound I hear while driving w/o braking is similar to that of a blown tire smacking the ground if that helps. I am not entirely sure this factors in at all but my upper motor mount bushings are in need of replacement, you can move the upper motor mounts with your hand granted it isn't a large degree of motion but enough to visible see it. Lastly the brakes were still in good condition though someone brought up that they may have crystallized. I hope you all can help me narrow this down, I am not too familiar with brake systems. Thanks in advance for any feedback you all may be able to provide.
    Reply With Quote  
     

  2. #2 Re: Vibration in passenger front 
    GXP Level Member coolone's Avatar
    Join Date
    Nov 2011
    Location
    NY
    Posts
    2,374
    Thanks (Received)
    0
    Likes (Received)
    3
    Dislikes (Received)
    0
    Could be lower engine mount, tranny mount, or hubs, if as you say you're balanced and aligned.
    Overkill BBC Cam, YT 1.8 RR's, Rhodes Lifters, STGII Heads, GenV, Pacesetters, 3" Exh to Tips, TEP Trans. N*, ID 75# injectors/E85 coming soon
    Reply With Quote  
     

  3. #3 Re: Vibration in passenger front 
    GrandPrix Junkie
    Join Date
    Oct 2009
    Location
    St. Louis
    Posts
    4,783
    Thanks (Received)
    18
    Likes (Received)
    76
    Dislikes (Received)
    0
    Might want to check the axle on that side. They are known to cause vibrations as well when they start to go bad. If it turns out to be this, get the Napa Gold one. The others are typically junk and will wear out in 6-8 months it seems. Lifetime warranty or not, how often do you want to change axles because you saved a few $$ on the Autozone one?
    Reply With Quote  
     

  4. #4 Re: Vibration in passenger front 
    GTP Level Member indygrandprix's Avatar
    Join Date
    Jan 2012
    Location
    Indianapolis
    Posts
    699
    Thanks (Received)
    0
    Likes (Received)
    0
    Dislikes (Received)
    0
    ^^^ second this. Especially the part about getting napa gold axles
    Quote Originally Posted by BillBoost37 View Post
    I went NA when a whore left -$300 in my bank account.
    Reply With Quote  
     

  5. #5 Re: Vibration in passenger front 
    SE Level Member
    Join Date
    Jun 2011
    Location
    Texas
    Posts
    78
    Thanks (Received)
    0
    Likes (Received)
    0
    Dislikes (Received)
    0
    Typically if the axle is the problem the vibration will be much worse on acceleration. If it changes drastically on acceleration I would replaced the right axle.
    Reply With Quote  
     

  6. #6 Re: Vibration in passenger front 
    GrandPrix Junkie
    Join Date
    Oct 2009
    Location
    St. Louis
    Posts
    4,783
    Thanks (Received)
    18
    Likes (Received)
    76
    Dislikes (Received)
    0
    Also, the brakes grabbing and letting go over and over may be the result of the old rotors. Were they warped at all? If they were and you didn't replace the pads it's quite possible that the pads aren't completely flat now. When I replace rotors I always replace the pads as well. If the rotors were damaged to the point of needing replacement, then the pads most likely are to.

    Besides, what's another $30 to put new pads on the front and have piece of mind that when you stomp on the brakes they will actually work as needed? Sometimes the only thing between me and a new front end is my brakes, ya know?
    Reply With Quote  
     

  7. #7 Re: Vibration in passenger front 
    SE Level Member
    Join Date
    Jun 2011
    Location
    Texas
    Posts
    78
    Thanks (Received)
    0
    Likes (Received)
    0
    Dislikes (Received)
    0
    The outer tie rods are also very common to wear out. This will not cause a vibration, but will allow a little vibration to become a bad vibration.
    Reply With Quote  
     

  8. #8 Re: Vibration in passenger front 
    SE Level Member ablank37821's Avatar
    Join Date
    Jun 2012
    Location
    Newport, TN
    Posts
    9
    Thanks (Received)
    0
    Likes (Received)
    0
    Dislikes (Received)
    0
    That's one of the odd things Tech, from what I can tell acceleration seems to dampen the vibration and the moment I let off the pedal it is more noticeable. And Fordman, the old rotors were just wore down to the point where they just couldn't be turned anymore, and the reason I didn't replace my brakes was b/c the pads still have a long way to go before they need to be replaced and I was hoping to upgrade to ceramics which as I am sure you all know are around $80 for just the front. To build off what coolone said, something I have noticed is when I park on any incline and release the brake the car has it's usual roll back till the transmission catches it, but when it catches the car bounces back a lot and you can actually feel the engine being rocked back and forth, this is nearly any incline greater than maybe 10-15 degrees, it honestly feels like it's gonna break the motor mounts. With that said could this simply be the upper mounts causing it or could it actually be the lower mounts/tranny mount. The thing that really boggles my mind is this vibration comes and goes, early in the morning and and late at night seem to be the two most frequent parts of the day that it happens, I commute 66 miles round trip for work and Saturday it never vibrated once even while reaching speeds of 85-90 mph, the next day its starts vibrating soon as I hit about 40 mph. I honestly never even thought to check the tie rods, but thinking about it that seems possible, the car seems to b in near perfect alignment but when the vibration begins it def pulls to the right I wanna kick myself for not thinking about that. I will check them immediately and get back to you all asap, any more suggestions are greatly appreciated and thank all of you who have offered input so far.
    Reply With Quote  
     

  9. #9 Re: Vibration in passenger front 
    SE Level Member ablank37821's Avatar
    Join Date
    Jun 2012
    Location
    Newport, TN
    Posts
    9
    Thanks (Received)
    0
    Likes (Received)
    0
    Dislikes (Received)
    0
    Sure as **** I have 9-3 movement with the wheel off the ground, gonna replace the tie rod end and hope for the best

    *Update* Got the tie rod end changed and so far so good, I will keep this updated until I know for sure it's good to go
    Last edited by ablank37821; 10-07-2013 at 02:54 PM.
    Reply With Quote  
     

  10. #10 Re: Vibration in passenger front 
    SE Level Member ablank37821's Avatar
    Join Date
    Jun 2012
    Location
    Newport, TN
    Posts
    9
    Thanks (Received)
    0
    Likes (Received)
    0
    Dislikes (Received)
    0
    So far I have run about 60 miles or so and the god aweful vibration/wobble is gone, still have a little bit in the brake pedal but that should even out when the pads wear a lil more. Thanks everyone
    Reply With Quote  
     

Similar Threads

  1. Replies: 0
    Last Post: 07-12-2013, 10:22 AM
  2. Right front vibration
    By tcman49 in forum Brakes/Suspension/Chassis
    Replies: 2
    Last Post: 12-05-2011, 03:52 PM
  3. Vibration from front end
    By Blue00GTcoupe in forum 1997-2007 4 speed Automatic (4T65E) (4T65E-HD)
    Replies: 8
    Last Post: 05-07-2010, 10:43 AM
  4. Please help, very bad vibration in front of car
    By tcestes in forum Brakes/Suspension/Chassis
    Replies: 5
    Last Post: 04-16-2009, 10:17 PM
  5. 01 GT Vibration in Front Right End
    By sweard2003 in forum 3.8L V6 Naturally Aspirated (L36)(L26)
    Replies: 2
    Last Post: 10-30-2008, 08:57 AM
Tags for this Thread

View Tag Cloud

Bookmarks
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
  •