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Discussion Starter · #1 ·
I upgraded my suspension last fall and replaced the u-joints at the same time. Since nissan uses crappy u-joints they needed to be replaced. I added new leaf spring kit in rear and radflows in front. The u-joints I added were greaseable. Did it every oil change or so which is more than enough for greasing. Now 7 months later one of the replaced u-joints is bad. Would the setup of the suspension make or increase the life of the u-joint to go bad this quickly. I am replacing them with warranteed u-joints from Autozone. Is there anything I can do to help the wear on them? It is the rear driveshaft also. Thanks.
 

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2wd or 4wd?

Like TO stated, if your pinion angle isn't straight with driveshaft, it will cause extra stress on the U-joints. If it is the rear U-joints, then you can use a pinion shim to change slightly rotate your rear axle to help fix the angle.

If it is the front, then idk since the diff is pretty much locked in place and when you lift it, it is the CVs that get fubared, not the U-joints.
 

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It is caused by the distance increasing from where your tranny mounts to where your axle is now located in relation. Because your axle now sits lower in relation to the trany it results in a steeper angle in the driveline. You can get an angled pinion shim to correct it if that is in fact what the problem is.

Basically you can buy a package of what looks like rear lift blocks cut at an angle; there will typically be 3 to a package that can adjust from .5 to 2* if I remember correctly.

Do you have any pictures of your pinion and drive shaft angle currently? It may not even be that...but just the first thing I could think of since you mentioned you had lifted the truck. I should be able to give you an idea if your pinion angle seems to be drastic enough to cause the issue if you can snap a picture.
 

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You have to small of a lift to cause u-joint problems.

What brand u-joints did you install? Who installed them?
 

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Discussion Starter · #7 ·
Duralast from Autozone...

I did keep the load leaf on for more payload which is excellent except for the u-joints. The rear is definitely higher than the front. Real noticeable. I will take a snapshot when I get a change and place it on here. Thanks for all the input, gents. Only one u-joint is making the awful noise it didnt when I replaced all four of them in the fall. The rear one on the rear shaft.
 

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I would start with the pinion shim and replace the rear joint. You could also replace the xfer joint too on the Dshaft to be safe since it will be wearing out too but you don't have to if you are willing to replace it when it eventually fails too.
 

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I would suggest that you find how far out from 90deg the DS is compared to the pinion/yoke flange.

You could also do a bunch of trig to figure it out or measure a stock frontier on a dealers lot and make your angles similar. Heck, there may also be an online calculator that you just enter numbers into.

If all else fails, then just guess and check and find what works for you.
 
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