70 C-10 Driveline whine - The 1947 - Present Chevrolet & GMC Truck Message Board Network

TC70C10 · 12-23-2002, 02:56 PM

Need some ideas on where to go next.
A couple of weeks ago I started hearing a noise while the truck is moving. Noise changes pitch as speed increases. Thought it might be wheel bearings. A buddy stuck his head out as we went down the road and he thought it was in the rear wheel. So, I replaced the rear wheel bearings and still had the noise. I did the front inner and outer bearings Friday night and still the noise. Where to next ?? Transmission, Clutch, U-Joints??. Clutch replaced 15 k ago, U-joints less that 3k. ANY IDEAS welcome.

bowtie · 12-23-2002, 03:36 PM

Do you have a 1 or 2 piece drive shaft? If its a 2 peice check your steady (center) bearing and also your U-joints.

dubie · 12-23-2002, 03:42 PM

First place to check would be the U-joints, they start to squeak and whine when they are shot. If they seem to be tight, then check for any play in your center bearing, but like Bernie said, only if it's a 2 piece

12-23-2002, 02:56 PM	#1
TC70C10 Registered User Join Date: Nov 2001 Location: Harvest, AL 35749 Posts: 337	70 C-10 Driveline whine Need some ideas on where to go next. A couple of weeks ago I started hearing a noise while the truck is moving. Noise changes pitch as speed increases. Thought it might be wheel bearings. A buddy stuck his head out as we went down the road and he thought it was in the rear wheel. So, I replaced the rear wheel bearings and still had the noise. I did the front inner and outer bearings Friday night and still the noise. Where to next ?? Transmission, Clutch, U-Joints??. Clutch replaced 15 k ago, U-joints less that 3k. ANY IDEAS welcome. __________________ 1981 K5 Blazer 305, 4spd, 4x4, 4" Lift, custom bumpers, Warn 9.5 Ti Winch 1995 T10 Blazer 4.3L 4x4 (Son's) 2004 GMC Envoy 4.2L 2WD 2005 GMC Sierra Crew Cab Z71 4x4 5.3L 240 Fun Finder Travel Trailer Harvest, AL 35749

12-23-2002, 03:36 PM	#2
bowtie Senior Member Join Date: Dec 1999 Location: Saskatchewan Posts: 1,050	screech Do you have a 1 or 2 piece drive shaft? If its a 2 peice check your steady (center) bearing and also your U-joints. __________________ ~70 GMCprostreet swb 396/700r NOS 575 hp "the Brick" ~72 chev swb w/68 front clip "GM Millenium corvette yellow" I use and accept Paypal

12-23-2002, 03:42 PM	#3
dubie Registered User Join Date: May 2000 Location: Flin Flon, Manitoba, Canada Posts: 8,855	First place to check would be the U-joints, they start to squeak and whine when they are shot. If they seem to be tight, then check for any play in your center bearing, but like Bernie said, only if it's a 2 piece __________________ My name's Tim and I'm a truckaholic My 56 Chevy shop truck build http://67-72chevytrucks.com/vboard/s...d.php?t=562795



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