U-Joint Pin

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Model T Ford Forum: Forum 2012: U-Joint Pin
Top of pagePrevious messageNext messageBottom of page Link to this message  By Thomas M. Mattingly on Saturday, May 19, 2012 - 08:56 am:

How long is the U-Joint pin supposed to be? After peening one end, it looks like the pin is going to be longer than what is needed to hold the U-joint and drive shaft in place. When I removed the original pin, I remember that the pin was basically flush on both sides of the U-Joint. With the length of the new one, its going to be a bit longer. Is this OK?


Top of pagePrevious messageNext messageBottom of page Link to this message  By Jim Thode Chehalis Washington on Saturday, May 19, 2012 - 09:04 am:

Tom,
As long as it don't rub and is not so close that it will rub with a little bearing wear, you should be good to go.
Jim


Top of pagePrevious messageNext messageBottom of page Link to this message  By Kenneth Swan on Sunday, May 20, 2012 - 09:03 am:

Tom, just use a Dremel too and remove the excess from the peined area. If you have the modern pinion bearing set up you don't have to pein the pin at all, just let it free-float, it can't go anywhere. I have used that method for years and have logged thousands of miles using that method.


Top of pagePrevious messageNext messageBottom of page Link to this message  By Ken Todd on Sunday, May 20, 2012 - 11:45 am:

A new pin should be 9/32"D X 1&9/16" long.


Top of pagePrevious messageNext messageBottom of page Link to this message  By John F. Regan on Sunday, May 20, 2012 - 03:19 pm:

As the maker of one of the modern pinion conversions I have to respectfully disagree that it is OK to leave out the u-joint pin. The u-joint is not supposed to slide freely forward and backward on the drive shaft since if it moves to one extreme and there is a sudden drop of the rear end into a hole or other large bump the ujoint can be caught in a bind since it may not be centered on the pivot center of the large ball housing as it is designed to be. It will then have to slide to its centered position very quickly and thus I can envision it literally "squirting" into position with some force. The pin is placed so that the ujoint pivot knuckle is centered at the pivot center of the housing ball so both can move together without binding.


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