good vibrations......not!!! - The 1947 - Present Chevrolet & GMC Truck Message Board Network

69mychevy · 06-30-2002, 01:50 PM

my 69 chevy sometimes will vibrate at 445 or 50 and sometimes not until 65, how do i fix it, is it u-joints?? driveshaft?? i hav to go on the highway with this truck and i can't when its vibrating, and its not at high rpms when its vibrationg only like 2000

blue72stepside · 06-30-2002, 03:02 PM

It depends on what type of vibaration u have.
Check out tires first, balance, out of round, ect. Then the front end or the drive line. Front end: bad ball joints, idle arm, pitman arm, shocks. Drive line: balance, out of time, u joints. it is possible the trany slipping can cause a vibaration. hope this helps

69mychevy · 06-30-2002, 04:12 PM

hey im only 16 so i don't understand most of that stuff u just said but im tryin to get into cars more so if u hav time to explain it that would b benificial if not thanx for tryin to help me

Super Chevy · 06-30-2002, 07:17 PM

jordan, you have alot of spinning parts like the driveshaft,tires ect. they all have to be balenced or itll shake ,its like when a fan losses a blade and turns and vibrates

Low69CST · 06-30-2002, 07:36 PM

A good guess would be the midshaft bearing. I've seen several go out, but when you crawl under the truck, they still feel really solid. Just if you seperate the 2 driveshafts make sure that you mark them so they go back together the same, if you don't you'll have a major vibration and ruin your new midshaft bearing. I learned that one the hard way.

bigvinnie · 06-30-2002, 07:38 PM

is this something that happened all of a sudden or has it been slowly getting worse...??? if all of a sudden, have you done anything recently that would cause the problem, like front suspension work, tire rotation, etc....????

when was the front suspension rebuilt last...??? Jack up a front tire, grab it at the 12 and 6 positions.... pull on the top and push at the bottom (and vice versa) to see if there's any looseness...

let us know what you find....

72chevyLWB · 06-30-2002, 07:38 PM

I just had a vibration problem like that too. I had to shim my tranny up 1/2 inch because of the drop kit setting my angles way off. The vibration ended up ruining my pinion bearing too, so get it fixed right away.

fluffytx1 · 06-30-2002, 09:14 PM

mine was a u-joint problem chased it for a month then found a bad u-joint

06-30-2002, 01:50 PM	#1
69mychevy yes i did post something Join Date: Jun 2002 Posts: 244	good vibrations......not!!! my 69 chevy sometimes will vibrate at 445 or 50 and sometimes not until 65, how do i fix it, is it u-joints?? driveshaft?? i hav to go on the highway with this truck and i can't when its vibrating, and its not at high rpms when its vibrationg only like 2000

06-30-2002, 03:02 PM	#2
blue72stepside Registered User Join Date: Aug 2001 Location: Morgan Hill, California Posts: 309	It depends on what type of vibaration u have. Check out tires first, balance, out of round, ect. Then the front end or the drive line. Front end: bad ball joints, idle arm, pitman arm, shocks. Drive line: balance, out of time, u joints. it is possible the trany slipping can cause a vibaration. hope this helps __________________ 72 Cheyenne Stepside 357/TH350 3.07 Posi 379HP@5500 412FT#@4000 96 1500 Work Truck 88 Chevy Van 3/4 97 Tahoe 8.5 Lift (Sons) 00 1500 LT 4x4 (Sons) 98 Ford Cobra (Wifes Car)

06-30-2002, 07:36 PM	#5
Low69CST Registered User Join Date: May 2000 Location: Frankfort, Kentucky, USA Posts: 2,163	A good guess would be the midshaft bearing. I've seen several go out, but when you crawl under the truck, they still feel really solid. Just if you seperate the 2 driveshafts make sure that you mark them so they go back together the same, if you don't you'll have a major vibration and ruin your new midshaft bearing. I learned that one the hard way. __________________ '69 CST Short fleetside Lowered, 400 small block, 700R4, 4 wheel disc brakes, front sway bar & rear camaro sway bar (in progress) '87 V10 4x4 Short Fleetside Quad Suspension and Dual Tanks

06-30-2002, 07:38 PM	#6
bigvinnie Registered User Join Date: Aug 2001 Location: escondido, ca 92026 Posts: 1,222	is this something that happened all of a sudden or has it been slowly getting worse...??? if all of a sudden, have you done anything recently that would cause the problem, like front suspension work, tire rotation, etc....???? when was the front suspension rebuilt last...??? Jack up a front tire, grab it at the 12 and 6 positions.... pull on the top and push at the bottom (and vice versa) to see if there's any looseness... let us know what you find.... __________________ '72 short step, 350, 700R4, tilt, ps, pdb, a/c, lowered coils, etc., other work in progress... San Diego, CA 72 Stepside Project

06-30-2002, 07:38 PM	#7
72chevyLWB Got 20's???? Join Date: Oct 2001 Location: Aberdeen SD Posts: 1,451	I just had a vibration problem like that too. I had to shim my tranny up 1/2 inch because of the drop kit setting my angles way off. The vibration ended up ruining my pinion bearing too, so get it fixed right away. __________________ 99 Silverado Ex-Cab 2wd, Bagged&WhippleCharged 02 Sierra Ex-Cab 4wd 2500 HD The 72 went down the road.

06-30-2002, 04:12 PM	#3
69mychevy yes i did post something Join Date: Jun 2002 Posts: 244	hey im only 16 so i don't understand most of that stuff u just said but im tryin to get into cars more so if u hav time to explain it that would b benificial if not thanx for tryin to help me

06-30-2002, 07:17 PM	#4
Super Chevy Registered User Join Date: Feb 2001 Location: Ohio Posts: 1,025	jordan, you have alot of spinning parts like the driveshaft,tires ect. they all have to be balenced or itll shake ,its like when a fan losses a blade and turns and vibrates

06-30-2002, 09:14 PM	#8
fluffytx1 Registered User Join Date: Feb 2002 Location: point blank Posts: 113	vibe help mine was a u-joint problem chased it for a month then found a bad u-joint __________________ 1968 GMC CST long wide box http://groups.yahoo.com/group/67-72-collectors/



Register or Log In To remove these advertisements.

Register or Log In To remove these advertisements.