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Go Back   Chevy and GMC Duramax Diesel Forum > Chevy / GMC Duramax 01-04.5 LB7 Forums > 01-04.5 LB7 Duramax Powertrain
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01-04.5 LB7 Duramax Powertrain Discussion of components that are directly involved in the power production and all that is needed to get and keep the truck moving . Engine , Transmission Ect

 
       

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Old 09-19-2008, 01:18 PM   eBay Motors   #1 (permalink)
Black Smokin Duramax
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Angry Vibrations at around 45-55 mph!!!

I have an 03 2500HD crewcab short bed, I've had a very annoying vibration at a speed 45-50mph, I've had it into the tire shop a 3 times telling them to check for out of round and balance, they tell me they are good, bfgoodrich 28575r16 I still think it might be a bent rim or tire, but cant tell, I've had the rear end serviced, transmission serviced, driveline balanced, shocks replaced will billstiens can't seem to get rid of it, it is extremely annoying and right on que 45 mph. Any advice or suggestion would help.
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Old 09-19-2008, 01:23 PM   eBay Motors   #2 (permalink)
86burgandyss
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Have you checked your u joints?? I had a bad vibration tha started around 45-50mph. Had that vibration for about 10,000 miles before I found out the ujoint at the rearend was bad. So bad in fact I am amazed it didnt break. had to have therear yoke replaced on the drive shaft. I had my tire balanced, then rotated and balanced al before I found the bad u-joint.
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bully dog w/outlook ,bully dog cold air and 5 inch turbo back, with 6 inch tip.
replaced stock tank with a 55 gallon aftermarket tank
5% tint on all windows, and "eyebrow" on front windshield.

Last edited by 86burgandyss : 09-19-2008 at 01:59 PM.
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Old 09-19-2008, 01:51 PM   eBay Motors   #3 (permalink)
TYREBOYZ_DEMAXIN
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did you notice a difference in the vibration while braking,going into curves or even changing as you drive?
whent they rebalanced the tires did they rotate them or only rebalanced..
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Old 09-19-2008, 02:21 PM   eBay Motors   #4 (permalink)
timespentsearching
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on a gasser i had it did something similar when my knock sensor went out
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Tuner: EFI Live, DSP5 switch
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Old 09-19-2008, 09:32 PM   eBay Motors   #5 (permalink)
Black Smokin Duramax
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Yeah, my rear u-joints are new, they did also rotate tire after balance, front u-joints are factor u-joints though, I have heard about problems with the bfgoodrich tires though. I don't notice problem when braking or turning, just as soon as i hit 45 mph my truck start to vibrate, I'm wonder if one of the belts in one of the tires is bad.
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Old 09-19-2008, 10:43 PM   eBay Motors   #6 (permalink)
86burgandyss
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If one of your belts were bad you would feel a difference when you had them rotated. If it was on the front you would have a pull to the side that was bad. That is my experience anyway.
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07 classic crew cab long bed 2wd
3.73 rear, stock tire size
bully dog w/outlook ,bully dog cold air and 5 inch turbo back, with 6 inch tip.
replaced stock tank with a 55 gallon aftermarket tank
5% tint on all windows, and "eyebrow" on front windshield.
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Old 09-19-2008, 10:57 PM   eBay Motors   #7 (permalink)
Tow Master
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Man there could be a ton of things. Do you feel it in the seat or in the steering wheel? Did it get any better or worse after the tire shop rotated the tires?
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Old 09-20-2008, 06:33 AM   eBay Motors   #8 (permalink)
bigblue
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I have an 03 2500, same thing was happening found out it was the wheel bearings, replaced and it was fine. have you checked them?
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Old 09-21-2008, 08:20 AM   eBay Motors   #9 (permalink)
Black Smokin Duramax
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Haven't checked the wheel bearings, I feel it under the seat. I will have to try and check the bearings, it's about the only thing i haven't done.
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Old 09-21-2008, 08:42 AM   eBay Motors   #10 (permalink)
86burgandyss
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Did you have both drive shafts balanced as one unit after you did the ujoint? If you are feeling it in your seat, I would guess that it is in the drive shaft or rear end.
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07 classic crew cab long bed 2wd
3.73 rear, stock tire size
bully dog w/outlook ,bully dog cold air and 5 inch turbo back, with 6 inch tip.
replaced stock tank with a 55 gallon aftermarket tank
5% tint on all windows, and "eyebrow" on front windshield.

Last edited by 86burgandyss : 09-21-2008 at 11:42 PM. Reason: non typing skills
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