Project Comanche Posted June 9, 2014 Share Posted June 9, 2014 I am in the process of changing from vac disco two piece axle shaft setup to 1 piece with larger joints from a TJ. Is there a way to test old used u joints? Should I replace them or use them? If you recommend replacing which u joints do you recommend? Link to comment Share on other sites More sharing options...
Zebvance Posted June 9, 2014 Share Posted June 9, 2014 Replace. They are cheap enough to do them while you are taking the axles out. Other wise you are going to spend a lot of time replacing them down the road when it could have been avoided. Moogs are always a good brand to go to. They can be had a most auto parts stores. Spicer is also good. Get grease able ones if you can. They last longer but cost a few extra bucks. Link to comment Share on other sites More sharing options...
Jeep Driver Posted June 9, 2014 Share Posted June 9, 2014 Moog/Federal suck @$$, this in less than two years. Spicer. Image Not Found Link to comment Share on other sites More sharing options...
Herc Posted June 9, 2014 Share Posted June 9, 2014 Whether you use Moog, Federal Mogul, Spicer or any other brand, take the caps off and give them a healthy dose of grease before installing. They are not packed with enough grease to just install as they are in the box. But YES definitely REPLACE the u-joints it is cheap insurance. Link to comment Share on other sites More sharing options...
Zebvance Posted June 9, 2014 Share Posted June 9, 2014 If you look on the boxes is specifically says not to add grease. To much grease will damage them just as to little grease.... Link to comment Share on other sites More sharing options...
Blue XJ Posted June 9, 2014 Share Posted June 9, 2014 I'd replace them with spicer 297's, or 760's if your not opposed to grinding the inside of the yoke a little to make room for a circle clip. I would not put more grease in them, if they required more grease, they would come with more grease. Link to comment Share on other sites More sharing options...
91Pioneer Posted June 9, 2014 Share Posted June 9, 2014 Do not add grease if they are sealed U-joints, they don't have much grease but that is the right amount. Don't think you know better than the guys who make them. I'm referring to Spicer here. Personally I'd take sealed over greasable U-joints any day. Link to comment Share on other sites More sharing options...
Herc Posted June 9, 2014 Share Posted June 9, 2014 I'll keep adding grease to my u-joints as I have lost track of how many different joints I have found devoid of any grease in the crosses and just enough in the caps to hold the needle bearings. That goes for sealed or greasable joints. We'll all do things our own ways. Link to comment Share on other sites More sharing options...
Project Comanche Posted June 10, 2014 Author Share Posted June 10, 2014 Link to comment Share on other sites More sharing options...
pettus253 Posted July 1, 2014 Share Posted July 1, 2014 bleepinjeep on youtube has a video about this. shows what and how to do the conversion. I myself am going to go to a single axle shaft Link to comment Share on other sites More sharing options...
Herc Posted July 9, 2014 Share Posted July 9, 2014 Both Moog and Precision joints "add grease" When I use a Spicer joint I'll check it as well. Link to comment Share on other sites More sharing options...
Blue XJ Posted July 10, 2014 Share Posted July 10, 2014 Based on those two boxes, I'd say Moog and Precision are the same part. Link to comment Share on other sites More sharing options...
wvzj Posted July 19, 2014 Share Posted July 19, 2014 Based on those two boxes, I'd say Moog and Precision are the same part. You would be correct they are the same parts both made by Federal Mogul, and the same as Napa u-joints. I believe the "super strengths" are made in the USA Link to comment Share on other sites More sharing options...
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