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Old 11-28-2006, 02:34 PM   #1
GearHeadGMC71
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New driveshaft

I am very new to the site and not sure if this has been posted before. I have a 71 GMC long bed and I am having problems with my carrier beam for my driveshaft. Is there a way to get a driveshaft made to go straight from the transmission to the rear end or would that not work.
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Old 11-28-2006, 03:55 PM   #2
1970 CST Short Wide
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Re: New driveshaft

This has been debated on here a million times. YES you can go with a 1 piece drive shaft but with a long bed your better off getting a QALITY center support bearing.
The 1 piece shaft would need to be made by a shop that knows what there doing and even then you take a chance of it vibrating.

Hope this helps and Good Luck
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Old 11-28-2006, 04:23 PM   #3
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Re: New driveshaft

not somuch vibrating, but whipping, which feels like a vibration from the drivers seat. This will damage the tranny and rear.
A quality carrier bearing would be the prefered fix, and if you already have a quality unit, then locating the real problem would work too. These things should last 30 years.
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Old 11-28-2006, 04:30 PM   #4
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Re: New driveshaft

Just out of curiousity -
which is preferred on a SWB by most - Carrier bearing or a 1-piece?
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Old 11-28-2006, 04:32 PM   #5
Longhorn Man
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Re: New driveshaft

a SWB is short enough to go with a one piece with no problems.
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Old 11-28-2006, 06:49 PM   #6
1970 CST Short Wide
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Re: New driveshaft

Who has that link to the killer billet center support? It’s not cheap but quality usually isn’t. If I did another LWB truck I think it’s what I'd go for.

Come on one of you guys has the link for it I'm sure
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Old 11-28-2006, 07:13 PM   #7
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Re: New driveshaft

Quote:
Originally Posted by 1970 CST Short Wide View Post
Who has that link to the killer billet center support? It’s not cheap but quality usually isn’t. If I did another LWB truck I think it’s what I'd go for.

Come on one of you guys has the link for it I'm sure
Don't know if this is the one of which you speak but it is the only one that came to my mind. This one is form inland Empire

http://www.iedls.com/bearings.html
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Old 11-28-2006, 07:30 PM   #8
TP from Cntl PA
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Re: New driveshaft

I had the same problem........Although, with the Cummins, when things let go, everything let go. Three Carrier bearings(in less than a year) later I decided to hill-billy engineer something that would atleast hold together until I upgrade the rest of the driveline from the bell housing back............Anyhow, I took a bearing out of torn up carrier, machined a housing from steel, and mounted it solid to the chassis............Yeah, its a no-no to solid mount parts like that, but its going on 8 months now and I haven't had any issues with any driveline parts.

It will be nice when everything is replaced with heavier duty parts
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Old 11-28-2006, 08:36 PM   #9
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Re: New driveshaft

I ran the original (factory) carrier bearing for 30 years and 350,000 miles before it started making noise. It was replaced by a NAPA bearing 5 years ago and it's still going GREAT! Quality costs a little more but not much more. Stay away from Chinese bearings - they're junk.
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