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| | | | Joined: Oct 2007 Posts: 12 'Bolter | | 'Bolter Joined: Oct 2007 Posts: 12 | Howdy fellow bolters... I have a '72 Winnebago 20 footer that is one of the fortunate few on a Bowtie C-30 chassis, not some old wheezing Mopar with backwards lug nuts. The challenge.. The two piece driveshaft keeps chewing up the center support bearing. The bearing pulls out of its rubber cushion and then the thing just self destructs into a molten rubber and grease mess. I must be doing something wrong when I put in a new bearing - but what? The original factory bearing went 80,000 miles.
The very best nugget of wisdom anyone could ever offer you in dealing with your wife: You can be happy, OR, you can be right.
| | | | | Joined: Oct 2007 Posts: 12 'Bolter | | 'Bolter Joined: Oct 2007 Posts: 12 | Added thought - any easy way to change this to a one piece driveshaft?
The very best nugget of wisdom anyone could ever offer you in dealing with your wife: You can be happy, OR, you can be right.
| | | | | Joined: Nov 2005 Posts: 6,100 'Bolter | | 'Bolter Joined: Nov 2005 Posts: 6,100 | Hy Door Hits Fender, As a general rule no driveshaft should be longer than 72". Do the replacement bearings sieze up and tear up, or melt the rubber? Are you buying name brand bearings? | | | | | Joined: Jun 2004 Posts: 8,597 Riding in the Passing Lane | | Riding in the Passing Lane Joined: Jun 2004 Posts: 8,597 | Your drive shaft must be out of balance or have runout. The replacements arn,t as good as the originals but usually last a few years. Do you have the yokes lined up when you put them together? You should take the whole assem. to a drive shaft shop & have them check it out.
Last edited by Wrenchbender Ret.; 03/01/2008 9:54 PM.
They say money can't buy happiness. It can buy old Chevy trucks though. Same thing. 1972 Chevy c10 Cheyenne SuperIn the Gallery Forum | | | | | Joined: Dec 2003 Posts: 2,733 Shop Shark | | Shop Shark Joined: Dec 2003 Posts: 2,733 | There may be some shims missing where the carrier bearing bolts up. I know it's rubber mounted but it still needs to be sort of square to the bearing itself. The cushion mounting allows for the upward motion of the rear end and vibrations. I would also check the carrier bearing itself for correct dimensions and installation.
Gas drivlines (3000rpm) should never exceed 60" ctr/ctr and 72" is correct for slower((2000rpm) turning diesels. Runout should not exceed .005 at the yoke and .010 in the middle of the shaft. If this is maintained and the phasing is correct you will not have a vibration problem. | | |
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