Addressing the Problem with a Worn Prop Shaft

Yes double cardan, which implies that the universal joint we know is a cardan joint.

Yes the use of the cv joint then allows for the flange surfaces not to be parallel.

Tom Wood's custom drive shafts web page has some info on selecting the type of joint.

I understand worn joints are repairable rather than just using a new shaft replacement.
I have looked on AULRO for repair advice and parts required, but must be searching for the wrong things.
Advice please.

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Originally Posted by rrturboD

I understand worn joints are repairable rather than just using a new shaft replacement.
I have looked on AULRO for repair advice and parts required, but must be searching for the wrong things.
Advice please.

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Check out the good oil.

http://www.aulro.com/afvb/good-oil/6...an-joints.html

Just what I had been looking for, thanks, but 32 pages.....
I'll add a new entry when I get my bits, because some of the part numbers have changed.

Mario at Roverlord was advertising kits a few weeks ago, so I assume he would still be able to supply them, so maybe you don't need to research too much.
Regards Philip A

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Originally Posted by rrturboD

Just what I had been looking for, thanks, but 32 pages.....
I'll add a new entry when I get my bits, because some of the part numbers have changed.

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Scroll down on the link I gave you. Check out Urban Panzers link and Clubagreenies post.

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Originally Posted by d2dave

A cardan joint is not used to alleviate the angles, it is used because the two mating flanges are not parallel. If they are parallel, large angles can work ok with standard uni joints.

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A Cardan Joint is the same as a Hooke's Joint or universal joint - same thing, different names.

I don't think, there is a problem with the prop shaft design, only with poor maintenance. I get some broken prophafts and all had rusted and worn one of the universal joints. Central bearring was in much better condition. And in all shafts, the 3rd universal joint (at front diff side) was already replaced with a new one.
The maintenance of double joint is a bit harder, but it is still just maintenance.
Second problem is - original universal joints have no grease point, so everyone thinks, no maintanance is necessary. This is totally wrong.

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Originally Posted by madtom

I don't think, there is a problem with the prop shaft design, only with poor maintenance. I get some broken prophafts and all had rusted and worn one of the universal joints. Central bearring was in much better condition. And in all shafts, the 3rd universal joint (at front diff side) was already replaced with a new one.
The maintenance of double joint is a bit harder, but it is still just maintenance.
Second problem is - original universal joints have no grease point, so everyone thinks, no maintanance is necessary. This is totally wrong.

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So if there are no grease points how is maintenance done?

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So if there are no grease points how is maintenance done?

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Gee I am hardly game to post that in this case maintenance perhaps maybe should be replaced with "inspection". ( to be precise)

I inspect mine before any long trip, by lying underneath and looking for any rust marks, grabbing each element both ends and seeing if there is any play.

IMHO, the ones that go "suddenly" do no such thing as a uni joint will soldier on for months , maybe years when it is stuffed.
I was going to say it takes cloth ears and no appreciation of differences in vibration not to know when a uni is on the way out but I don't want to offend anyone , so I won't.
Just for that my shaft will probably let go next week.
Regards Philip A