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If you would like to help support Duramax Forum, get some sweet stickers for your truck and more priveleges on Duramax Forum.com, click here | | | 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 |  | |
09-19-2008, 01:18 PM
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eBay Motors
#1 (permalink)
| | Member
Join Date: Sep 2008
Posts: 31
| 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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09-19-2008, 01:23 PM
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eBay Motors
#2 (permalink)
| | DuramaxForum Veteran
Join Date: Jun 2007 Location: michigan
Posts: 943
| 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.
__________________ 07 classic crew cab long bed 2wd
500,000 miles and counting
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 Titan 55 gallon aftermarket tank
115 gallon auxilary 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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09-19-2008, 01:51 PM
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eBay Motors
#3 (permalink)
| | Diesel Addict
Join Date: Feb 2007 Location: Barnesville OH
Posts: 6,943
| 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..
__________________ James
Priority List
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09-19-2008, 02:21 PM
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eBay Motors
#4 (permalink)
| | DF Sponsors
Join Date: Aug 2008 Location: Fargo, ND
Posts: 2,394
| on a gasser i had it did something similar when my knock sensor went out
__________________ Pickup: 03 GMC 2500HD EXT Cab Long Box
Tuner: EFI Live, DSP5 switch
Exhaust: Diamond Eye 5 inch system, BD manifold, PnP manifolds
Airtake: S&B intake
Fueling: Airdog 150
Turbo: SDP 64.5mm www.screamindieselperformance.com
Modded IHI and Garrett VVT turbos
Turbo Port and Polish
Turbo Rebuilding |
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09-19-2008, 09:32 PM
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eBay Motors
#5 (permalink)
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Join Date: Sep 2008
Posts: 31
| 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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09-19-2008, 10:43 PM
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eBay Motors
#6 (permalink)
| | DuramaxForum Veteran
Join Date: Jun 2007 Location: michigan
Posts: 943
| 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.
__________________ 07 classic crew cab long bed 2wd
500,000 miles and counting
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 Titan 55 gallon aftermarket tank
115 gallon auxilary tank 
5% tint on all windows, and "eyebrow" on front windshield. |
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09-19-2008, 10:57 PM
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eBay Motors
#7 (permalink)
| | Oh.... Squirrel!!
Join Date: Oct 2006 Location: Irwin PA
Posts: 12,460
| 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?
__________________ Jason 2006 Silverado 2500HD LBZ CC SB Escalade Handles, Front windows tinted to match the rear, painted bumpers, billet grille 4 Kicker 10in Subs in 2 custom box's, Autometer Ultra lite II Pyro and Boost gauges HID Highs, Lows, Fogs Transgo Jr, Cognito Braces, MBRP Turbo Back Stainless Exhaust (Straight piped), w/ stainless tip PPE Hot+2 285/70/17 Nitto Terra Grapplers on Pro Comp Wheels ****Lost Kitty Reward if found!!**** 1999 Ford F-550 PowerStroke ''Wrecker'' **Jerrdan bed, S&B Intake |
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09-20-2008, 06:33 AM
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eBay Motors
#8 (permalink)
| | Junior Member
Join Date: Aug 2008
Posts: 5
| 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?
__________________ 03 Dmax
AFE stage 2 intake, Throttle-body spacer
Tripledog W/outlook, Magna Flow 4" exhaust
------------------- 01 Dodge 5.9L Cummins AFE stage 2 intake, Split ring removed(Louder Whistle),
Edge Juice W/Att, 4" Banks exhaust |
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09-21-2008, 08:20 AM
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eBay Motors
#9 (permalink)
| | Member
Join Date: Sep 2008
Posts: 31
| 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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09-21-2008, 08:42 AM
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eBay Motors
#10 (permalink)
| | DuramaxForum Veteran
Join Date: Jun 2007 Location: michigan
Posts: 943
| 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.
__________________ 07 classic crew cab long bed 2wd
500,000 miles and counting
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 Titan 55 gallon aftermarket tank
115 gallon auxilary 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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