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Which u-joints—greasable or not
https://slantsix.org/forum/viewtopic.php?t=63979		 Page 1 of 1
Author:  69moredoor [ Thu Aug 22, 2019 10:51 am ]
Post subject:  Which u-joints—greasable or not
Going to put new u joints in...should I go with greasable or not? If greasable zerk in end cap or cross?
Author:  afastcuda1970 [ Thu Aug 22, 2019 11:19 am ]
Post subject:  Re: Which u-joints—greasable or not
Greasable is fine for a street car. Solid cross for racing. I don't think zerk location will matter other than ease of access.
Author:  wjajr [ Thu Aug 22, 2019 1:06 pm ]
Post subject:  Re: Which u-joints—greasable or not
I have had problems greasing front U joint, not enough room to get small gun head between arms of shaft. Required pulling drive shaft to articulate joint enough to get the grease gun on to zerk. I have since changed to a non zerk non greaseable HD front joint; AC Delco # 45U0137

My rear joint has two different sized arms because I run an 8 3/4" rear end.
Author:  Joshie225 [ Thu Aug 22, 2019 1:29 pm ]
Post subject:  Re: Which u-joints—greasable or not
Spicer sealed joints are all I buy. It's 100% worth the extra money. I did have to take a driveshaft back to the shop once because they broke a seal when they installed the joints after shortening the shaft.
Author:  GregCon [ Thu Aug 22, 2019 2:11 pm ]
Post subject:  Re: Which u-joints—greasable or not
The theory has always been to install the grease fitting so that it is under compression, not tension, when the power is applied going forward. This is also another good reason why you should never drag race in reverse.
Author:  Rick Covalt [ Thu Aug 22, 2019 2:31 pm ]
Post subject:  Re: Which u-joints—greasable or not
If getting a joint that is greased on a semi regular basis, I see no reason not to get the grease fitting on the end cap. My conversion joint is that way in my race car.

And yes it is a good practice to put the grease fitting in so it is under compression.
Author:  GregCon [ Thu Aug 22, 2019 4:20 pm ]
Post subject:  Re: Which u-joints—greasable or not
I have to admit, I don't think I've ever actually greased a u-joint other than right after I installed it. It's not like I put 50,000 miles on any of my old cars anymore. And back when my old cars were daily drivers, I didn't drive nearly as much as I do now.
Author:  Louise76 [ Thu Aug 29, 2019 8:47 pm ]
Post subject:  Re: Which u-joints—greasable or not
On our daily drivers, always greasable. I have a small-snout grease gun that does fine on them. Works good with the right tooling,
Author:  jcc [ Tue Sep 03, 2019 2:16 pm ]
Post subject:  Re: Which u-joints—greasable or not
Quote:
The theory has always been to install the grease fitting so that it is under compression, not tension, when the power is applied going forward. This is also another good reason why you should never drag race in reverse.



Why I hang out on this site. :lol:

On greasing, are the non grease-able joints solid all the way thru or do they still have the internal drilling but without the drilling/tapping for the fitting?

Seems to me, a hybrid? solution would be one with the cross drilling, and just install a zerk in the center of one(?) of the caps and grease thru that zerk, with out weakening the center highly loaded cross structure by installing a zerk there.
Author:  Joshie225 [ Tue Sep 03, 2019 5:17 pm ]
Post subject:  Re: Which u-joints—greasable or not
The Spicer joints are solid and they last longer than greaseable ones just like modern sealed chassis joints last longer than the old tech.
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