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despite what many think wd-40 (water displacement try #40) isn't a good lubricant. So spraying it on anything to lube it will not last. Spraying inside your CV boot will not to anything. Unless the boot is torn there is grease in there. And its good practice to grease the splines of the shaft to prevent them from sieving fast to your hub. But I don't see that it would cause a squeak.
 

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Discussion Starter · #23 ·
laszlo462 said:
For me, I end up using WD-40 and the like more to identify the source rather than fix it. If I hit something with it, it works in, and the noise is gone? Now it's time to address the problem.
Thats what I was planning on doing, using wd-40 just to try to eliminate/find the squeak and then replace whatever part it is.

I'm almost certain that the squeak is getting louder. I might have to work in the dark tonight to try to find the problem before something potentially seizes up while I'm driving.

And even though the boot isnt broken in the CV Axle, could it not have gone rusty/bad over time anyways?
 

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Check your UCA bushings. If not greased before installing, that rubber compound when mounted and compressed can make a really annoying squeak similar to yours, including when turning the wheel (changing weight distribution on the UCAs) and articulating up and down over bumps. Sometimes a thin film of grease will do the trick. Just make sure your lube does not attack rubber/plastic.

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Discussion Starter · #26 ·
loud_pipes said:
Check your UCA bushings. If not greased before installing, that rubber compound when mounted and compressed can make a really annoying squeak similar to yours, including when turning the wheel (changing weight distribution on the UCAs) and articulating up and down over bumps. Sometimes a thin film of grease will do the trick. Just make sure your lube does not attack rubber/plastic.

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I don't think any grease was added to the bushings when we put them on.
I assume that if I remove the UCA from the frame to grease the bushings, then I'll have to get an allignment done?
 

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Discussion Starter · #29 ·
How would I go about greasing the bushings? They're the rough country ones and they're only like 2 months old. Do I just grease the outter areas?

I might contact RC if it is the bushing and they're already squeaking because there's no grease nipples for them
 

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you just wipe grease on the outsides of the bushings on the mating surface, youre going to have a hard time getting them greased with a needle.

Its usually just common practice to always grease suspension components. And there aren't any grease nipples for them because its cheap RC parts, emailing them wont do anything. My cognitos have greasable upper bushings and they tell you in the instruction to keep them greased.
 

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Discussion Starter · #32 ·
They make cognito UCAs for a 7.5inch lift? I think I've heard of it before but just want to make sure.
I might just swap the RC ones for the cognito ones if I find out that's the problem.

I would assume RC would send me a new pair of UCAs if these ones are already messed up after just 2~ months
 

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The UCAs aren't necessary messed up, so it might be a tough sell. It's more just hard rubber being squeezed against and rubbing on metal. And you don't want to inject grease into the bushing, but rather grease the outside edges of the bushings where they come in contact with the mounting brackets. It's tough to get grease in there without disassembly. But you could try a WD40/penetrating lube as a temporary solution, to see if it could work it's way in enough to alleviate the squeak.

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Discussion Starter · #37 ·
Im gunna rip the knuckle off tonight and see if I can push the UCA up/down to recreate the squeaking.
If that is it, I'll leave it alone till the weekend. Do you guys think I should just put the factory UCAs back in and then order cognitos?
 

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$600 shipped for a set. And noo don't put your stock ones back on. You will max out your ball joint. Just take them off, grease them, put them back on with the cam bolts in the same position.

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