Whole lotta shakin' goin' on... - The 1947 - Present Chevrolet & GMC Truck Message Board Network

MrGoodpliers · 07-07-2005, 08:40 PM

Okay, maybe not a whole lot, but enough to be annoying. I have a vibration that comes in at about 50-55 mph. It starts very small, gets faster, then goes away. It cycles every second or two. The truck has all new stuff in the front, rebuilt 400 trans and new driveshaft. My guess is that it's something in the rearend. So what do ya'll think? Wheel bearing, bent axle, gears?

Olden Days · 07-07-2005, 09:04 PM

could be as simple as tires not balanced. Maybe a wheel weight came off or you got a tire going bad. I had a brand new tire warp on me once so bad you could visibly see it, and is shook the he11 out of the truck

**Classic Heartbeat** · 07-07-2005, 09:19 PM

Could also be your flywheel. If it is cracked it will vibrate also. WES www.ClassicHeartbeat.com

*newin72* · 07-07-2005, 11:03 PM

is it a LWB?

I had this happen on my suburban and it was the rear carrier bearing.

took mine to a local drive shaft shop and the replaced two u-joints and the rear-carrier bearing for $134 out the door.

purple gas · 07-07-2005, 11:52 PM

First, easiest, cheapest thing to check is the tires for ballance or a defect.

farmaller · 07-08-2005, 05:22 AM

When I used to drive the big trucks I had that happen a few times and it was either u-joints, carrier bearing or the splines binding on the drive shaft.
Remember "New" is not always perfect.

OLDROCK&ROLLER · 07-08-2005, 07:28 AM

Sounds like a u-joint. Take it drive shaft back and let them ckeck it.

MrGoodpliers · 07-08-2005, 08:53 AM

Thanks for the suggestions. I have this terrible habit of diving way farther into a problem than is required only to find it was a simple fix. I'll check tires, alignment and u-joints first.

07-07-2005, 08:40 PM	#1
MrGoodpliers Registered User Join Date: May 2002 Location: Gainesville, Georgia Posts: 704	Whole lotta shakin' goin' on... Okay, maybe not a whole lot, but enough to be annoying. I have a vibration that comes in at about 50-55 mph. It starts very small, gets faster, then goes away. It cycles every second or two. The truck has all new stuff in the front, rebuilt 400 trans and new driveshaft. My guess is that it's something in the rearend. So what do ya'll think? Wheel bearing, bent axle, gears? __________________ We made Oklahoma a little after 3, Randy & his brother Bob & my old GMC...

07-07-2005, 09:19 PM	#3
Classic Heartbeat Project Junkie! Fishing Poor!! Join Date: Dec 1999 Location: Olympia,Wa. 98512 Posts: 10,770	Could also be your flywheel. If it is cracked it will vibrate also. WES www.ClassicHeartbeat.com __________________ On-line catolog Classic Heartbeat Pickup Parts WEHEPP@comcast.net Call us Toll Free (888) 338-2502 Like Us on Facebook No appointment necessary. 72 BB Chevy Custom Deluxe / Custom Camper 67 I-6 (Soon to be 5.7 LS1) Panel 68 BB Chevy Short Bed 72 6.0 LQ9 Short Bed Chevy 4X4 Olympia's fastest growing truck parts supplier. Olympia's home for Wayward Chevys

07-07-2005, 11:52 PM	#5
purple gas Registered User Join Date: Oct 2004 Location: saskatoon, planet earth Posts: 686	First, easiest, cheapest thing to check is the tires for ballance or a defect. __________________ I got a bench seat baby, you don't have to sit over there.

07-08-2005, 05:22 AM	#6
farmaller Registered User Join Date: Nov 2004 Location: Rudolph, WI. Posts: 66	When I used to drive the big trucks I had that happen a few times and it was either u-joints, carrier bearing or the splines binding on the drive shaft. Remember "New" is not always perfect. __________________ Currently helping a Friend build a 71 Custom Camper into his dream truck Guess that makes me the Middle man since he asks questions and I search for the answers

07-08-2005, 07:28 AM	#7
OLDROCK&ROLLER Registered User Join Date: Feb 2004 Location: WHITEVILLE N.C. Posts: 494	Sounds like a u-joint. Take it drive shaft back and let them ckeck it. __________________ 72 CHEYENNE 10 SUPER 468/400/3.73

07-07-2005, 09:04 PM	#2
Olden Days Living In The Past Join Date: Nov 2003 Location: Rockies Posts: 709	could be as simple as tires not balanced. Maybe a wheel weight came off or you got a tire going bad. I had a brand new tire warp on me once so bad you could visibly see it, and is shook the he11 out of the truck

07-07-2005, 11:03 PM	#4
newin72 Account Suspended Join Date: May 2005 Location: East Texas Posts: 545	is it a LWB? I had this happen on my suburban and it was the rear carrier bearing. took mine to a local drive shaft shop and the replaced two u-joints and the rear-carrier bearing for $134 out the door.

07-08-2005, 08:53 AM	#8
MrGoodpliers Registered User Join Date: May 2002 Location: Gainesville, Georgia Posts: 704	Thanks for the suggestions. I have this terrible habit of diving way farther into a problem than is required only to find it was a simple fix. I'll check tires, alignment and u-joints first. __________________ We made Oklahoma a little after 3, Randy & his brother Bob & my old GMC...



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