NAXJA Forums -::- North American XJ Association  

Go Back   NAXJA Forums -::- North American XJ Association > NAXJA Unibody Jeep Technical Forums > Jeep Cherokee XJ (1984 - 2001) > OEM Tech Discussion
HOME Member FAQ Sponsor Info Rules Bylaws E-Mail

OEM Tech Discussion Forum for OEM (Original Equipment) or stock XJs and MJs.

Reply
 
Thread Tools Display Modes
  #1  
Old January 22nd, 2023, 11:32
maxbraketorque maxbraketorque is offline
NAXJA Forum User
 
Join Date: Jul 2020
Location: PDX
Posts: 1,031
Install axle u-joints with or without lube on press fit surfaces?

I've been watching a bunch of videos on axle u-joint removal and installation. Old u-joints are out, and new are ready to be installed after I finish a bit of clean-up and painting.

Most people put some sort of lube on the press-fit surfaces, but I came across a thread where a person adamantly stated that no lube should be used because it will cause the joint to slip in the press-fit surface during use. Anyone know the correct answer?
Reply With Quote
  #2  
Old January 22nd, 2023, 11:45
JonnyCat63 JonnyCat63 is offline
NAXJA Member
 
Join Date: Apr 2015
Location: San Diego
Posts: 291
Re: Install axle u-joints with or without lube on press fit surfaces?

I use some sort of lube on almost everything. Grease, anti-seize, lock-tite, dielectric grease, silicone grease, you name it.

On any metal threads or metal to metal contact, cars, plumbing, whatever, I use some sort of lube. For me, it aids in wear, and make the replacement process much easier.

I can remember years ago snapping a bolt off on one of my Ford vans alternator bolt. A steel bolt into an aluminum bracket, from the factory, no anti seize. Who thought that was a good idea?

I say yes, lube on everything, properly cleaned, torqued and/or assembled, never had any issues.

To quote and old Frank's Red Hot Sauce slogan: "I put that shit on everything!"
Reply With Quote
  #3  
Old January 22nd, 2023, 12:36
RCP Phx RCP Phx is offline
NAXJA Forum User
 
Join Date: Mar 2003
Location: Phoenix,Az
Posts: 16,462
Re: Install axle u-joints with or without lube on press fit surfaces?

Where would it "slip" to???
Reply With Quote
  #4  
Old January 22nd, 2023, 14:35
maxbraketorque maxbraketorque is offline
NAXJA Forum User
 
Join Date: Jul 2020
Location: PDX
Posts: 1,031
Re: Install axle u-joints with or without lube on press fit surfaces?

Quote:
Originally Posted by RCP Phx View Post
Where would it "slip" to???
I suppose the inference was that it would stress the c-clips. But I can only guess.
Reply With Quote
  #5  
Old January 22nd, 2023, 16:15
lawsoncl lawsoncl is offline
NAXJA Forum User
 
Join Date: Jan 2006
Location: North Idaho
Posts: 5,927
Re: Install axle u-joints with or without lube on press fit surfaces?

Quote:
Originally Posted by maxbraketorque View Post
I've been watching a bunch of videos on axle u-joint removal and installation. Old u-joints are out, and new are ready to be installed after I finish a bit of clean-up and painting.

Most people put some sort of lube on the press-fit surfaces, but I came across a thread where a person adamantly stated that no lube should be used because it will cause the joint to slip in the press-fit surface during use. Anyone know the correct answer?
Personally, I clean up the bores with a little steel wool and apply a little oil or antiseize so go in easier and don't get stuck the next time. The only force on the caps is to push the outward, and the clips will hold them. In fact, when you're done, give the u-joint a few taps in either direction to make sure the caps are pushed up against the clips.
Reply With Quote
  #6  
Old January 22nd, 2023, 16:39
maxbraketorque maxbraketorque is offline
NAXJA Forum User
 
Join Date: Jul 2020
Location: PDX
Posts: 1,031
Re: Install axle u-joints with or without lube on press fit surfaces?

Thanks everyone. I filed off burrs and cleaned up the bores with a wire brush attachment on my drill. It looks very nice now. I'm a big fan of anti-seize as well, so I'll use a bit of that on the bores when I install the u-joints. Hopefully everything will go together without a hitch.
Reply With Quote
  #7  
Old January 22nd, 2023, 17:56
Unclewolverine Unclewolverine is offline
NAXJA Forum User
 
Join Date: Jun 2019
Location: Kansas
Posts: 861
Re: Install axle u-joints with or without lube on press fit surfaces?

I've always put them in dry and never had an issue.
Reply With Quote
  #8  
Old January 22nd, 2023, 19:10
Anak's Avatar
Anak Anak is offline
Stranger
 
Join Date: Sep 2013
Location: In a strange land
Posts: 4,975
Re: Install axle u-joints with or without lube on press fit surfaces?

I just clean up the driveshaft/yoke surfaces and install the caps with whatever lube/protective coating is on them already.
__________________
Project "Scope Creep": 1996 4wd 4.0L, AX15

The "Varmint-Mobile": 1997 ZJ Laredo, 4wd, 4.0L, Slushbox
Reply With Quote
  #9  
Old January 23rd, 2023, 10:56
Rob Mayercik's Avatar
Rob Mayercik Rob Mayercik is offline
NAXJA Member #920
 
Join Date: Jun 2002
Location: NJ, U.S.A.
Posts: 2,998
Re: Install axle u-joints with or without lube on press fit surfaces?

Quote:
Originally Posted by maxbraketorque View Post
I suppose the inference was that it would stress the c-clips. But I can only guess.
More likely it's because the lube could cause the whole cap to rotate with the joint (and, coincidentally, wearing the holes in the yoke) rather than the friction between cap and yoke holding the cap stationary while the joint rotates in/with the needle bearings inside the cap.

That said, it doesn't sound like most folks have that much difficulty getting those apart - it's not like the joint and yoke are different metals (leading to the galvanic corrosion/dissimilar metals issue that Jonny ran into with that Ford alternator).
__________________
1992 Cherokee Laredo: "A wonderful balance of grace and rust"
1984 Dodge Omni
2002 Volkswagen Jetta GLS TDI
Reply With Quote
  #10  
Old January 23rd, 2023, 11:57
maxbraketorque maxbraketorque is offline
NAXJA Forum User
 
Join Date: Jul 2020
Location: PDX
Posts: 1,031
Re: Install axle u-joints with or without lube on press fit surfaces?

Quote:
Originally Posted by Rob Mayercik View Post
More likely it's because the lube could cause the whole cap to rotate with the joint (and, coincidentally, wearing the holes in the yoke) rather than the friction between cap and yoke holding the cap stationary while the joint rotates in/with the needle bearings inside the cap.

That said, it doesn't sound like most folks have that much difficulty getting those apart - it's not like the joint and yoke are different metals (leading to the galvanic corrosion/dissimilar metals issue that Jonny ran into with that Ford alternator).
Seems like the u-joint bearing would have to be seized for there to be enough torque to cause the cap to rotate in the yoke.
Reply With Quote
  #11  
Old January 25th, 2023, 17:52
lawsoncl lawsoncl is offline
NAXJA Forum User
 
Join Date: Jan 2006
Location: North Idaho
Posts: 5,927
Re: Install axle u-joints with or without lube on press fit surfaces?

Quote:
Originally Posted by Rob Mayercik View Post
That said, it doesn't sound like most folks have that much difficulty getting those apart.
I've done my fair share where the caps are rusted up and a bugger to get out. Some people manage to bend the ears trying to press them out (with poor technique in my opinion). If you break one while offroading, you'll be glad the previous installer used anti-seize.
Reply With Quote
  #12  
Old January 25th, 2023, 19:11
Anak's Avatar
Anak Anak is offline
Stranger
 
Join Date: Sep 2013
Location: In a strange land
Posts: 4,975
Re: Install axle u-joints with or without lube on press fit surfaces?

Quote:
Originally Posted by lawsoncl View Post
I've done my fair share where the caps are rusted up and a bugger to get out. Some people manage to bend the ears trying to press them out (with poor technique in my opinion). If you break one while offroading, you'll be glad the previous installer used anti-seize.
That is a good argument for the use of anti-seize.
__________________
Project "Scope Creep": 1996 4wd 4.0L, AX15

The "Varmint-Mobile": 1997 ZJ Laredo, 4wd, 4.0L, Slushbox
Reply With Quote
  #13  
Old January 25th, 2023, 19:11
maxbraketorque maxbraketorque is offline
NAXJA Forum User
 
Join Date: Jul 2020
Location: PDX
Posts: 1,031
Re: Install axle u-joints with or without lube on press fit surfaces?

Quote:
Originally Posted by lawsoncl View Post
I've done my fair share where the caps are rusted up and a bugger to get out. Some people manage to bend the ears trying to press them out (with poor technique in my opinion). If you break one while offroading, you'll be glad the previous installer used anti-seize.
I used a shop press, and a few of my u-joints took some effort to start moving. A BFH might start things moving more easily, but generally dislike the idea of that approach.

Anyhow, I'm going to use some anti-seize. I can't see how a cap can ever spin in a yoke, and I figure that a bit of anti-seize will help with straightening the ears with a hammer tap after pressing in the caps.
Reply With Quote
  #14  
Old January 25th, 2023, 19:20
lawsoncl lawsoncl is offline
NAXJA Forum User
 
Join Date: Jan 2006
Location: North Idaho
Posts: 5,927
Re: Install axle u-joints with or without lube on press fit surfaces?

Quote:
Originally Posted by maxbraketorque View Post
straightening the ears
Expanding on my comment on poor pressing technique:

I use a slightly different method for pressing or hammering out joints. I have a piece of u-channel that I stick underneath to support the cross of the joint or the ears on other sides. Then I stick a big socket on top of the upper cap and press on that. The result is forcing the cross and the upper cap upwards into the socket. Flip over and repeat to get the other cap out

The risk of the "traditional" method is having the upper cap bind up and instead of both caps moving downward, the bottom one moves and the upper ear bends inward.
Reply With Quote
  #15  
Old January 25th, 2023, 19:29
lawsoncl lawsoncl is offline
NAXJA Forum User
 
Join Date: Jan 2006
Location: North Idaho
Posts: 5,927
Re: Install axle u-joints with or without lube on press fit surfaces?

Scroll to about 46 minutes to see the flipped over version of what I do. He uses a tool on top that presses downward on the cross instead of the upper cap. https://www.youtube.com/watch?v=U6QKs9JajQ4&t=2780s
Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Pre Lube Kit Install mflueras Modified Tech Discussion 2 December 27th, 2010 06:55
To install new bearings in a 9 inch, one needs a press..... JEONLYEP Colorado Chapter 20 May 7th, 2008 20:30
Front Axle Lube Lowrange2 Modified Tech Discussion 3 March 27th, 2007 16:55
No-slip install questions for 8.25, general pumpkin sealing, gear lube, etc Rusty from Cleveland Modified Tech Discussion 17 January 8th, 2007 06:52
can you lube both u joints in front diff on 90 xj lapaul OEM Tech Discussion 3 July 21st, 2004 07:45


All times are GMT -7. The time now is 10:58.


Powered by vBulletin® Version 3.8.9
Copyright ©2000 - 2023, vBulletin Solutions, Inc.
NAXJA and NAXJA logo's Copyright NAXJA. All content/images Copyright NAXJA 1999-2014