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GMC Jimmy Vibrations

22 messages,  Last post on Jul 01, 2009 at 4:28 PM

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What is this discussion about? GMC Jimmy, GMC S-15 Jimmy, SUV

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#19 of 22 Re: Bad Shake/Vibration 250,000 miles 93 Jimmy [wings_2007] by repairdog Jul 29, 2006 (3:30 am)
Replying to: wings_2007 (Jul 27, 2006 4:12 pm) Rear pinion bearing, U-joints, rear xfer case bearing. Get the tire/wheels force balanced (better machine) that makes sure both are good and heavy areas offset. At 250k its getting old and tired I guess. Finally check those rear drums for out of round - seen that and have to run it on a lift or jack stands to see the oval drum wobble - be careful. Replies to this message: wings_2007 (Aug 20, 2006 5:42 pm) wings_2007 (Aug 23, 2006 3:11 pm)
#20 of 22 Re: Bad Shake/Vibration 250,000 miles 93 Jimmy [repairdog] by wings_2007 Aug 20, 2006 (5:42 pm)
Replying to: repairdog (Jul 29, 2006 3:30 am) Thanks again for your suggestions. I think I finally found the main problem - a bad body mount. I guess my mechanics somehow overlooked it. I decided to crawl under there the other day with a crow bar to get a closer look at things. I noticed the mount near where the front door and fender meet on the passengers side was rusted. (Actually I guess it's the plate that the mount attaches to that's rusted.) So I took the crow bar and discovered I could move the body away from the frame/mount at that spot rather easily. I'm guessing that would give me the horrific vibrations. It should be fixed this week. I will post an update. Hopefully to say the vibratrion is gone! Replies to this message: wings_2007 (Aug 23, 2006 3:11 pm)
#21 of 22 Re: Bad Shake/Vibration 250,000 miles 93 Jimmy [wings_2007] by wings_2007 Aug 23, 2006 (3:11 pm)
Replying to: wings_2007 (Aug 20, 2006 5:42 pm) Finally after all this time the problem seems to be fixed. The mount was bad, the plate it attaches to was terribly rusted, and the floor board under that was all rusted away (13 years of Michigan winters and road salt will do that). Although you couldn't tell the floor was rusted just by looking. GM puts a rubber mat type thing in that spot of the floor board which holds it together even when rusted. It's defintely not an easy job having to replace the mounting plate and part of the floor but it was well worth it! Now when I hit bumps it's nice and smooth - Or as smooth as can be expected for an SUV with over 250,000 miles on it. I hope top get at least another 100,000 more miles now. GMC rules!!
#22 of 22 michael 79 possible rear bearing noise by michael79 Jul 01, 2009 (4:28 pm)
the noise started a few days ago, sounds like metal was caught on the rotor, but now after really listening to it, it is on the right rear side when i turn to the left and nothing when i turn to the right, it is getting worst, last longer, grinding sound now. thanks for the help

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