04-28-2022, 10:36 AM
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#1
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JBA UCA spindle nut loosening
For the folks running the JBA UCA's .. is anyone having to go through and tighten down the ball joint nut frequently? I feel like this is the 3rd time I am getting a clunk from the front end and after tightening down the nut again it seems to go away.
I know the spec calls for 60 ft-lbs.. but I feel like I am cranking down on this significantly harder and it seems to back off over time. It doesnt call for any washers to be installed, but I am considering possibly trying to see if that helps.
The last go-around I just did I noticed that I ended up with almost 1/8" of additional threads showing, but if I had to guess I am probably torqueing this down significantly higher than 60ft lbs.
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2003 Limited V8 4runner - 37's, Tacoma Front End swap, ARB locked front and rear , LC200 rack swap
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04-28-2022, 11:26 AM
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#2
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Quote:
Originally Posted by aemravan
For the folks running the JBA UCA's .. is anyone having to go through and tighten down the ball joint nut frequently? I feel like this is the 3rd time I am getting a clunk from the front end and after tightening down the nut again it seems to go away.
I know the spec calls for 60 ft-lbs.. but I feel like I am cranking down on this significantly harder and it seems to back off over time. It doesnt call for any washers to be installed, but I am considering possibly trying to see if that helps.
The last go-around I just did I noticed that I ended up with almost 1/8" of additional threads showing, but if I had to guess I am probably torqueing this down significantly higher than 60ft lbs.
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I have spc arms, but I torqued the nut into the spindle on mine to 90ft-lbs iirc
aren't the ubjs from like a gmc 2500 or something? Maybe try looking at the torque spec for those
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04-28-2022, 12:54 PM
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#3
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No issues with mine yet. The owner is super responsive, so Id ask him - are you leaking grease on to it perhaps?, but even that should hold.
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04-28-2022, 01:06 PM
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#4
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Should be a thin washer at the inside and a thicker washer on the outside, of the poly bushing.
...er thats the long bolt that holds the uca to the t4r, not the ball joint.
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04-28-2022, 10:00 PM
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#5
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I haven't seen this in a while, but you can over tighten ball joints. They're supposed to be a conical fit, so if you go a bit too heavy on the tightening you'll actually stretch the hole in the spindle/receiving end and it won't tighten up properly. I ran into this issue once on an old Land Cruiser someone had installed relay rods a while back and over tightened them. Caused a noise and when I tried to install the new ones, they didn't want to tighten up, kept spinning in the hole.
Not sure if that's you're your issue or not?
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04-29-2022, 09:22 AM
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#6
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Quote:
Originally Posted by BlackWorksInc
I haven't seen this in a while, but you can over tighten ball joints. They're supposed to be a conical fit, so if you go a bit too heavy on the tightening you'll actually stretch the hole in the spindle/receiving end and it won't tighten up properly. I ran into this issue once on an old Land Cruiser someone had installed relay rods a while back and over tightened them. Caused a noise and when I tried to install the new ones, they didn't want to tighten up, kept spinning in the hole.
Not sure if that's you're your issue or not?
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the spindle definitely isn't spinning.. it had some caked on mud and after tightening it I could clearly see 1-2 clean threads show up, so it definitely sucked the spindle down, not to mention my clunk went away.. but I can certainly see overtightening and causing the conical hole to open up for sure.. I don't believe that I went super Ape on it.. but who knows. I'll keep an eye on it and see what happens. What I probably should do is clean it up and throw a paint mark on it so I can see if it really is turning out or not
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04-29-2022, 11:59 AM
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#7
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Quote:
Originally Posted by aemravan
For the folks running the JBA UCA's .. is anyone having to go through and tighten down the ball joint nut frequently? I feel like this is the 3rd time I am getting a clunk from the front end and after tightening down the nut again it seems to go away.
I know the spec calls for 60 ft-lbs.. but I feel like I am cranking down on this significantly harder and it seems to back off over time. It doesnt call for any washers to be installed, but I am considering possibly trying to see if that helps.
The last go-around I just did I noticed that I ended up with almost 1/8" of additional threads showing, but if I had to guess I am probably torqueing this down significantly higher than 60ft lbs.
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Hasn't been an issue for me
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04-29-2022, 03:38 PM
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#8
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Never had an issue with my JBA UCAS like that. Are you using loctite or anti seize? Dry torque? Anything unusual?
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04-29-2022, 04:28 PM
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#9
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Quote:
Originally Posted by randy88fj62
Never had an issue with my JBA UCAS like that. Are you using loctite or anti seize? Dry torque? Anything unusual?
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No loctite or anti seize.. no.. dry "torque" .. I guess I should throw a torque wrench on it to see what it actually is..
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