Bill, the thing is, I've never even been able to see that grease fitting
(for the ball), no matter how much I rotate the front driveshaft. Does the
ball and spring put pressure on the spider? Is this how it stops the
double-cardan joint from wobbling?

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"L.W. ("ßill") Hughes III" > wrote in message
...
> Hi Doug,
> Sounds safer than letting the wife run you over. You'll need a
> grease needle to get the center bearing:
> http://www.billhughes.com/cvZerk.jpg Without that centering bearing the
> constant velocity universal joints would wobble all over the place:
> http://www.billhughes.com/CVJoint.jpg
> God Bless America, ßill O|||||||O
>
> Doug wrote:
>>
>> If I jack up both front tires of my cherokee, apply the parking brake and
>> put the auto-trans in neutral and leave the xfer case in 4WD will I be
>> able
>> to freely rotate the front driveshaft so I can get to all the zerk grease
>> fittings?
>>
>> Also, what's the double cardan joint ball for? In looking at the exploded
>> diagram of the double cardan joint in the front driveshaft (right next to
>> the xfer case) there is a ball fitting that looks like its got a grease
>> fitting. What I'm wondering is why you need this spring-ball at all. If
>> the
>> spiders are handling all the load from transferring power from the
>> driveshaft through the double cardan joint then what is the point of the
>> ball that goes between the spider and the center yoke in the double
>> cardan
>> joint?
>>
>> --
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