weird vibration - The 1947 - Present Chevrolet & GMC Truck Message Board Network

syntech · 12-05-2006, 05:48 PM

hey whats up,
got a problem that just started to happen today, i was driving to work as allways, and i was coming up to a stop light, and i let off of the gas, and before i hit the brake pedal, i got a pretty bad vibration, up untill i stopped, and from then on out, through acceleration and deceleration

, and the first thing i could think of was my wheel bearings and/or drive shaft. but i just replaced my wheel bearings(inners, outers, and seals) and rotors about two month's ago, and also have pulled them back off since to regrease them, just to be sure i got them greased properly. so i went ahead this morning and pulled both wheels and rotors, just to check, and they are fine, also i checked my u-joints , and driveshaft yokes, which are good.

so i really dont know where else to go from here, oohhh and i have also just had my wheels balanced. just wondering if anybody out there has ran into this kinda problem, and can help me out, or just point me in the right direction!!
thanks
Syntech

**raggedjim** · 12-05-2006, 06:20 PM

Don't know if this will help, but you may have a brake grabbing. I had a brake hose that had collapsed in the front and when I would hit the brakes it was fine but when I let them off the pressure wouldn't completely release and the brakes would grab. Took me a while to figure that one out...

Good luck, Rg

mhicks · 12-06-2006, 10:53 AM

Did one of the weights come off of the wheel?

lurch115 · 12-07-2006, 07:37 PM

how about a carrier bearing in the drive shaft?? if it has one it could be bad...and how did you check the u-joints?? i've found that checking for play doesn't always work....if the bearings inside the caps dry out and pulverize they still take up the same amount of space so there still won't be any play in them

magnethead · 12-07-2006, 09:16 PM

yea a colasped brake line will do wierd things. Make sure the pads haven't jumped around or anything.

syntech · 12-08-2006, 08:41 PM

for the u joints, i checked for play, i dont have carrier bearnings, as far as i know, the wheel weights didnt come off, i checked all of those's, and i dont have a colapsed brake line, i also checked those's. i had a buddy of mine who is a trans guy and he said it felt like it was more in likley the trans, he told me to replace the torque conveter and to be safe replace the valve body, now i'm just trying to find a torque converter and valve body. but i also had a friend tell me to look at the ring and pinion, b/c the backlash might be off, so come sunday i have alot of stuff to check out, but any more help would be great.

*trkklr77* · 12-08-2006, 10:35 PM

ujoints are WWWWAAAYYY cheaper than a vavle body and every time im about to eat a ujoint they dont get sloppy till ive run them an extra 200 miles[ about 2weeks commute]

grease them up and see what happens.

grinch4om · 12-09-2006, 11:37 AM

the lock up converter may have stayed locked up, see why before you spend, was it told to or was it stuck? diagnose and confirm before you spend. backlash in the rear wont do that out of the blue unless a catostrofic failure, i.e. pinion bearing, is it still doing it? a stuck egr valve rolling up to a stop will also cause vibration(engine miss at slow rpm's

12-05-2006, 05:48 PM	#1
syntech Registered User Join Date: Jul 2006 Location: melbourne, fl Posts: 11	weird vibration hey whats up, got a problem that just started to happen today, i was driving to work as allways, and i was coming up to a stop light, and i let off of the gas, and before i hit the brake pedal, i got a pretty bad vibration, up untill i stopped, and from then on out, through acceleration and deceleration, and the first thing i could think of was my wheel bearings and/or drive shaft. but i just replaced my wheel bearings(inners, outers, and seals) and rotors about two month's ago, and also have pulled them back off since to regrease them, just to be sure i got them greased properly. so i went ahead this morning and pulled both wheels and rotors, just to check, and they are fine, also i checked my u-joints , and driveshaft yokes, which are good. so i really dont know where else to go from here, oohhh and i have also just had my wheels balanced. just wondering if anybody out there has ran into this kinda problem, and can help me out, or just point me in the right direction!! thanks Syntech

12-05-2006, 06:20 PM	#2
raggedjim Senior Member Join Date: Jun 2002 Location: Murray, Kentucky Posts: 3,484	Re: weird vibration Don't know if this will help, but you may have a brake grabbing. I had a brake hose that had collapsed in the front and when I would hit the brakes it was fine but when I let them off the pressure wouldn't completely release and the brakes would grab. Took me a while to figure that one out... Good luck, Rg __________________ Roger '68 Short step - https://67-72chevytrucks.com/vboard/...d.php?t=849675 '69 ('70?) 2wd Blazer '70 GMC Jimmy 2wd '73 Firebird - https://67-72chevytrucks.com/vboard/...d.php?t=853203 Ideas - https://67-72chevytrucks.com/vboard/...d.php?t=851743

12-06-2006, 10:53 AM	#3
mhicks Registered User Join Date: Jan 2004 Location: Weatherford,Tx Posts: 747	Re: weird vibration Did one of the weights come off of the wheel?

12-07-2006, 07:37 PM	#4
lurch115 Registered User Join Date: Oct 2006 Location: iowa Posts: 722	Re: weird vibration how about a carrier bearing in the drive shaft?? if it has one it could be bad...and how did you check the u-joints?? i've found that checking for play doesn't always work....if the bearings inside the caps dry out and pulverize they still take up the same amount of space so there still won't be any play in them __________________ "Horsepower is how fast you hit the wall, torque is how far you carry the wall with you." '84 chevy half ton short box 2wd, 67,000 actual miles '03 chevy 1500 HD crew cab 4x4 standard box, 6.0L

12-07-2006, 09:16 PM	#5
magnethead 7000 #'s of american IRON Join Date: Dec 2004 Location: north tx Posts: 883	Re: weird vibration yea a colasped brake line will do wierd things. Make sure the pads haven't jumped around or anything.

12-08-2006, 08:41 PM	#6
syntech Registered User Join Date: Jul 2006 Location: melbourne, fl Posts: 11	Re: weird vibration for the u joints, i checked for play, i dont have carrier bearnings, as far as i know, the wheel weights didnt come off, i checked all of those's, and i dont have a colapsed brake line, i also checked those's. i had a buddy of mine who is a trans guy and he said it felt like it was more in likley the trans, he told me to replace the torque conveter and to be safe replace the valve body, now i'm just trying to find a torque converter and valve body. but i also had a friend tell me to look at the ring and pinion, b/c the backlash might be off, so come sunday i have alot of stuff to check out, but any more help would be great.

12-08-2006, 10:35 PM	#7
trkklr77 Account Suspended Join Date: Aug 2006 Location: vacaville ca, because it as far from indy as i can be Posts: 775	Re: weird vibration ujoints are WWWWAAAYYY cheaper than a vavle body and every time im about to eat a ujoint they dont get sloppy till ive run them an extra 200 miles[ about 2weeks commute] grease them up and see what happens.

12-09-2006, 11:37 AM	#8
grinch4om dang its hot Join Date: Nov 2006 Location: frankfort kentucky Posts: 1,349	Re: weird vibration the lock up converter may have stayed locked up, see why before you spend, was it told to or was it stuck? diagnose and confirm before you spend. backlash in the rear wont do that out of the blue unless a catostrofic failure, i.e. pinion bearing, is it still doing it? a stuck egr valve rolling up to a stop will also cause vibration(engine miss at slow rpm's



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