Bouncing at 45-50 MPH - Chevy and GMC Duramax Diesel Forum
04.5-05 LLY 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 04-29-2009, 12:28 PM   eBay Motors  #1 (permalink)
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Bouncing at 45-50 MPH

Since i got the truck last year i've noticed a bouncing between 45-50 MPH. I've changed tires and rims and it still does it. Any one have this problem too, or any suggestions would be grately appreciated
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Old 04-29-2009, 01:59 PM   eBay Motors  #2 (permalink)
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feel like seams in the road??

maybe the front wheel bearings or the intermediate steering shaft, or most likely both.

both are a terrible design, and with bigger tires and any alterations from the stock front end, they both can wear out faster.

I have 70K on my 05 4x4 LLY and just put on both last week from a nasty little vibration like that...
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Old 04-29-2009, 02:05 PM   eBay Motors  #3 (permalink)
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rotors maybe?
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Old 04-29-2009, 02:07 PM   eBay Motors  #4 (permalink)
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mine is the same...45-50 mph. a little embarrassing when i have passengers. i am now getting a little concerned if the hubs are wearing out, then ball joints
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Old 04-29-2009, 02:12 PM   eBay Motors  #5 (permalink)
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Mr. Obvious here...

Large tires, older truck....how'er the shocks?
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Old 04-29-2009, 02:14 PM   eBay Motors  #6 (permalink)
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in the last 5k (around 70K) i needed both front hubs (wheel bearings), tie rode ends, ball joints, idler & pit man arm, intermediate steering shaft, and 2 power steering hoses, AND shocks!

she sure drives nice now tho
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Old 04-29-2009, 02:20 PM   eBay Motors  #7 (permalink)
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wow...you just dropped some $$ man. that sucks...but like you said, im sure it rides nice now.
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35" TOYO OC MT'S 18" GEAR BIG BLOCKS * FABTECH 6" LIFT * FABTECH HD TIE RODS
S&B CAI * LOAD LIFTER 5000 AIRBAGS * PPE DEEP PAN * PPE SHIM KIT
4" STRAIGHT PIPE EXHAUST * MBRP 5" TIP * DIAMONDEYE DOWNPIPE
BANKS INTERCOOLER * RESONATOR HOLE PLUGGED * AIRDOG II 165
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EFILIVE DSP5 * BLACKDIRTYMAX PPE5 TRANS ML CONVERTER
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Old 04-29-2009, 02:23 PM   eBay Motors  #8 (permalink)
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everything but the shocks were covered in my GM PP extended warranty. it was totally awesome. they would have covered the shocks too, but i had just replaced them at like 60K with ranchos when i was trying to figure out what was making all that noise.

so i'm down about $200...

pretty fair deal
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Old 04-29-2009, 02:25 PM   eBay Motors  #9 (permalink)
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cool...glad that works out for you!!
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35" TOYO OC MT'S 18" GEAR BIG BLOCKS * FABTECH 6" LIFT * FABTECH HD TIE RODS
S&B CAI * LOAD LIFTER 5000 AIRBAGS * PPE DEEP PAN * PPE SHIM KIT
4" STRAIGHT PIPE EXHAUST * MBRP 5" TIP * DIAMONDEYE DOWNPIPE
BANKS INTERCOOLER * RESONATOR HOLE PLUGGED * AIRDOG II 165
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EFILIVE DSP5 * BLACKDIRTYMAX PPE5 TRANS ML CONVERTER
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Old 04-29-2009, 02:27 PM   eBay Motors  #10 (permalink)
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Just had a wheel bearing fixed and it didn't go away. The steering wheel doesn't shake but the hole truck seems to be bouncing. Dealer said I'd have to put stock tires on it to eval. it.
So i've been trying to get a cheap set of tires
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05 chevy 2500HD EC/SB ally

Leveling kit and 33's
LBZ MP
Amsoil
PPE standard level 3, thanks to madjacks racing
5" MBRP turbo back
Boost and Pyro with pillar, thanks to alligator performance
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