2-Piece Driveshaft Noise - Carrier? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

71GMC_3/4T · 03-29-2002, 05:59 PM

My '71 GMC 2500 is starting to make noises on cold mornings. I think it's coming from the driveline carrier bearing. Kind of a "screeeeeee" that kicks in above 10 or 20 mph.
Can this bearing be greased? Or do I need to put a new one on?
Thanks

------------------
1971 GMC 402/TH400
Workin' on it!
Gettin' on it!
Lafayette, CO
**Looking for a nice fleetside longbed for my GMC.

busterwivell · 03-29-2002, 06:01 PM

Mine was doing that about 3 years ago. I replaced it and have not had a noise since.

71GMC_3/4T · 03-29-2002, 06:23 PM

Is it a real pig to replace?

**COBALT** · 03-30-2002, 04:13 PM

Not really, but it does require (for me anyway) pressing out the center U-joint to get to the bolt that holds the removable yoke in place. The removable yoke sandwiches the bearing onto the shaft.

You can get new bearings at any NAPA (depending on what type you have, either the in-line bearing which is what I have, or the stronger "U" configurated bearing). Don't waste your time having a machine shop do the bearing press. At most let them either pull or press your center U-joint if you want to.

I'll email you some instructions.

------------------
'69 3/4 ton C20 2wd w/ 350ci/400THM and a wood bed!
'69 3/4 ton Custom 20 2wd w/ ORIGINAL 350ci/4sp Manual and a wood bed (parts beast).
Seattle, WA.

*See pics of my trucks and project at www.webshots.com!

jku72 · 03-30-2002, 07:58 PM

I dont know, maybe I have bad luck.
I tried to but a new center bearing for my c30 longhorn, but nobody has the right one for my truck. NAPA, carquest, chevrolet dealers, all try to give me the same wrong part.
The one they try to give me is round, with a mounting flat on one side.
The one in my truck has a bearing retainer that bolts together, and the bearing itself is a small ball bearing that just sits between the halves. Nobody has this thing, all I get is dumb looks for free. The bearing is not really bad, but is worn, and my driveshaft vibrates a little more all the time.
I have seen many 3/4 tons with the center bearing they try to sell me, but never seen another longhorn close enough to see if they have my type. There are two types, I have seen, but mine is a third. Hmmm.

------------------
jku
70 C30 CST Longhorn
68k10 burb
69 K5 beater
43 willys GPW
40 Chev coupe
67 catalina

71GMC_3/4T · 03-30-2002, 08:14 PM

Thanks for the replies. I guess I'll pick up the other two U-joints when I get the bearing. I've already replaced the farthest back one.
I just hope mine isn't one of those "wierd" ones.

70cst10 · 03-31-2002, 04:49 PM

I replaced mine last summer. I've driven the truck about 9000 miles since, and it's making the same noise. It's a higher pitched whine that comes and goes over about 10mph. I've heard that it's due to the fact I left the dust shields on with the new bearing. I need to replace that and my rear shocks. I think my u joints are going too. I'm getting a bit of vibration.

------------------
milanplechata@hotmail.com

Lexington, SC

1968 c/10 lwb 250/3 on the tree
1970 CST/10 lwb no motor/trans

http://communities.msn.com/6772GMTru...68longbed.msnw

Every man dies, but not every man truly lives..

03-29-2002, 05:59 PM	#1
71GMC_3/4T Weapons Of Construction Join Date: Apr 2000 Location: Colorado, USA Posts: 1,095	2-Piece Driveshaft Noise - Carrier? My '71 GMC 2500 is starting to make noises on cold mornings. I think it's coming from the driveline carrier bearing. Kind of a "screeeeeee" that kicks in above 10 or 20 mph. Can this bearing be greased? Or do I need to put a new one on? Thanks ------------------ 1971 GMC 402/TH400 Workin' on it! Gettin' on it! Lafayette, CO **Looking for a nice fleetside longbed for my GMC. __________________ 1971 GMC 2500, 402/TH400 4.10 Daily Driver Lafayette, CO

03-29-2002, 06:01 PM	#2
busterwivell Registered User Join Date: Jan 2002 Location: Sahuarita, AZ USA Posts: 2,033	Mine was doing that about 3 years ago. I replaced it and have not had a noise since. __________________ Bill - Tucson, AZ 47 Chevrolet 2 dr sedan 56 Chevrolet 210 2 dr sedan 66 Chevrolet Malibu 2 dr 4 speed 71 Chevrolet C30 Longhorn 86 Chevrolet Monte Carlo SS (Sold) 01 Chevrolet Tahoe IM - BUSTERWIVE@aol.com

03-29-2002, 06:23 PM	#3
71GMC_3/4T Weapons Of Construction Join Date: Apr 2000 Location: Colorado, USA Posts: 1,095	Is it a real pig to replace? __________________ 1971 GMC 2500, 402/TH400 4.10 Daily Driver Lafayette, CO

03-30-2002, 04:13 PM	#4
COBALT Senior Member Join Date: Sep 2001 Location: Seattle, WA, USA Posts: 5,817	Not really, but it does require (for me anyway) pressing out the center U-joint to get to the bolt that holds the removable yoke in place. The removable yoke sandwiches the bearing onto the shaft. You can get new bearings at any NAPA (depending on what type you have, either the in-line bearing which is what I have, or the stronger "U" configurated bearing). Don't waste your time having a machine shop do the bearing press. At most let them either pull or press your center U-joint if you want to. I'll email you some instructions. ------------------ '69 3/4 ton C20 2wd w/ 350ci/400THM and a wood bed! '69 3/4 ton Custom 20 2wd w/ ORIGINAL 350ci/4sp Manual and a wood bed (parts beast). Seattle, WA. *See pics of my trucks and project at www.webshots.com! __________________ '69 3/4 ton C20 2wd-350ci/TH400 '69 3/4 ton Custom 20 2wd-350ci/4sp Manual '99 2wd 5.7 Chevy Tahoe Seattle, WA.

03-30-2002, 07:58 PM	#5
jku72 Registered User Join Date: Jan 2002 Location: cornville, maine Posts: 659	I dont know, maybe I have bad luck. I tried to but a new center bearing for my c30 longhorn, but nobody has the right one for my truck. NAPA, carquest, chevrolet dealers, all try to give me the same wrong part. The one they try to give me is round, with a mounting flat on one side. The one in my truck has a bearing retainer that bolts together, and the bearing itself is a small ball bearing that just sits between the halves. Nobody has this thing, all I get is dumb looks for free. The bearing is not really bad, but is worn, and my driveshaft vibrates a little more all the time. I have seen many 3/4 tons with the center bearing they try to sell me, but never seen another longhorn close enough to see if they have my type. There are two types, I have seen, but mine is a third. Hmmm. ------------------ jku 70 C30 CST Longhorn 68k10 burb 69 K5 beater 43 willys GPW 40 Chev coupe 67 catalina __________________ jku Cornville, Maine 68 C10 burb 42 Willys MB 46 Dodge WF-32 1.5 ton 53 & 56 Olds' 60 Cadillac 22 Dodge Brothers

03-30-2002, 08:14 PM	#6
71GMC_3/4T Weapons Of Construction Join Date: Apr 2000 Location: Colorado, USA Posts: 1,095	Thanks for the replies. I guess I'll pick up the other two U-joints when I get the bearing. I've already replaced the farthest back one. I just hope mine isn't one of those "wierd" ones. __________________ 1971 GMC 2500, 402/TH400 4.10 Daily Driver Lafayette, CO

03-31-2002, 04:49 PM	#7
70cst10 Senior Member Join Date: Jun 2001 Location: Gaston, SC Posts: 580	I replaced mine last summer. I've driven the truck about 9000 miles since, and it's making the same noise. It's a higher pitched whine that comes and goes over about 10mph. I've heard that it's due to the fact I left the dust shields on with the new bearing. I need to replace that and my rear shocks. I think my u joints are going too. I'm getting a bit of vibration. ------------------ milanplechata@hotmail.com Lexington, SC 1968 c/10 lwb 250/3 on the tree 1970 CST/10 lwb no motor/trans http://communities.msn.com/6772GMTru...68longbed.msnw Every man dies, but not every man truly lives.. __________________ Milan 1964 Chevelle SS 283/M20



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