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Old 03-01-2011, 08:14 PM   #1
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U-Joints.....

I just replaced all three u joints on my 97 tj. 4.0... 5 1/2 months ago. It was squeeking and it had a bad vibration.... Well now it's doing it agin :-( I have a 6 inch susp lift and 33's. Sye also... Why are they bad again? I can't tell which one it is, so last time I changed all three of them and the vibration and squeeking was gone. Why am I eating up u-joints? Any help would be great :-)

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Old 03-01-2011, 08:23 PM   #2
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Something don't sound right. and you are sure its the rear and what's the pinion angle look like and have you greased them lately. If you are eating u joints like crazy id look at how steep the drive shaft is

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Old 03-01-2011, 08:27 PM   #3
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Lifts will create problems. Anything over 4 inches is going to really increase driveline angles in a Jeep and you might find that even if the pinion angle is right, that you may eat up u-joints alot faster. Just a simple 3 inch lift on my old K-5 Blazer and it wasn't uncommon to replace u-joints twice a year. But like just4fun said check your pinion angle. With a CV driveshaft your pinion on the axle should be pointed directly at the output yoke on your transfer case.

Edit: Another option if your pinion angle is correct might be to purchase re-buildable u-joints such as those from CTM or another company. They are very expensive but if you think about how much you might spend constantly replacing u-joints that might justify the price.
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Old 03-01-2011, 08:34 PM   #4
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You didn't say what kind of u-joints you're using. If they are high quality then blame it on the angles...if they're made in China or a a store brand blame the mfg.
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Old 03-01-2011, 08:37 PM   #5
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I believe my pinion angle is good. All the u joints look tight and I always grease them when needed. Which it doesn't take much to grease them either. Maybe one squirt. I see them expand just a little when I put grease in them, but I'm being careful that I don't put too much in them to make them leak. I'm gonna take some pics tomm and post them of my angle and let everyone see what I have. However I'm gonna put three new ones in her tomm after work also.
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Old 03-01-2011, 08:41 PM   #6
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Quote:
Originally Posted by TexasT
You didn't say what kind of u-joints you're using. If they are high quality then blame it on the angles...if they're made in China or a a store brand blame the mfg.
I bought them at advance auto parts, and I don't remember what brand they were. I'm sure they were garbage. It just sucks that I can't determine if it's only one that keeps going bad. The only 100% fix is buy all three. They all look perfect and show no signs of wear.
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Old 03-01-2011, 08:44 PM   #7
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All they sell is import junk unless you tell them to get you spicer or better. what brand of drive shaft is it id contact them for replacement ones.
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Old 03-01-2011, 08:49 PM   #8
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Quote:
Originally Posted by just4fun
All they sell is import junk unless you tell them to get you spicer or better. what brand of drive shaft is it id contact them for replacement ones.
I have no clue on the brand of driveshaft. I bought my jeep in august and I'm still learning alot on her. The po put alot of time into it and I'm still trying to figure out exactly what all it has. Well it was actually the owner before him that did all the work. I love my jeep and will NEVER get rid of it. It runs and drives perfectly, except for these u-joints!!!!
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Old 03-01-2011, 08:51 PM   #9
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I bought them at advance auto parts. .
Class A JUNK
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Old 03-01-2011, 08:54 PM   #10
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Class A JUNK
Lol.... Yeah... Do y'all think they are warrantied? If I can put three new ones in for now and shop around for some better ones in the mean time. Then when and IF they go bad, I will have my good ones in hand. This is my daily driver also.
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Old 03-01-2011, 08:57 PM   #11
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What part of the world do you live in. Maybe somebody from this forum lives close to you and could help you. Or you could take it out and have a professional fix it for you. I had my front rebuilt by fleet pride and they used spicer parts
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Old 03-01-2011, 09:00 PM   #12
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Originally Posted by just4fun
What part of the world do you live in. Maybe somebody from this forum lives close to you and could help you. Or you could take it out and have a professional fix it for you. I had my front rebuilt by fleet pride and they used spicer parts
I live in Chesapeake virginia. I really never take my vehicles anywhere to get worked on. Lol. I like to do all my work myself. I'm always ready to put a better part in my rides but knowing where to get it and if it's gonna exactly work is my worry. Being a daily driver to me I gotta keep it on the road...
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Old 03-01-2011, 09:01 PM   #13
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I recommend staying away from the big box stores I have had good luck with napa stuff before for daily drivers, find heavier duty stuff for things your gonna beat the dog snot out of
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Old 03-01-2011, 09:07 PM   #14
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Well hey neighbor im in Frederick Maryland. Check to see if there is a northern Virginia supply around near you they can get you parts or fix it if you remove it. And if its all you have to drive you can put it in 4 hi and drive on the front till its fixed.
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Old 03-02-2011, 04:46 PM   #15
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Here is the pics!
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Old 03-02-2011, 04:47 PM   #16
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Here is the pics!
Sorry for the bad pics :-(
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Old 03-02-2011, 06:50 PM   #17
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Gold Seal 1350's might do the trick.
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Old 03-03-2011, 06:03 AM   #18
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The pics are hard to see, but your angles look off or maybe its just me.

Are you running adjustable control arms with your lift????? if not, then thats have the problem right there, cause you'll have a hard time getting the pinion angle dialed in.

Next quit buying U-joints from Advanced or Autozone.... they are crap. You should be buying Spicers or Napa Precision U-joints. Any good drivetrain shop in your area should carry these are be able to get them.

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Old 03-03-2011, 07:33 AM   #19
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Spicer
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Old 03-03-2011, 07:48 AM   #20
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There is a place called Open Air Jeeps near the Lynnhaven Mall that specializes in Jeeps and they are reasonably priced. It's a small shop but they know what they are doing. Here is their site. Check them out and give them a call.
Open Air Jeeps - Home
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Old 03-03-2011, 09:36 AM   #21
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You haven't convinced me your rear pinion angle is correct, especially after you said "I believe my pinion angle is good". An improper pinion angle is, by far, the most likely cause of you going through u-joints. And I wouldn't use no-name house brand u-joints like you did either. Go with a quality u-joint brand like Spicer and personally, I STRONGLY recommend the Spicer 5-785x u-joint for the driveshafts.

Your pinion angle must (!) look like this or your u-joints won't last and you'll have drivetrain vibrations...
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Old 03-03-2011, 09:56 AM   #22
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Originally Posted by Kevinm2467 View Post
It just sucks that I can't determine if it's only one that keeps going bad. The only 100% fix is buy all three.
Seems to me that you should replace one at a time. Do the rearward one first. Drive it and see if the squeek has gone away. Then work forward if needed.
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Old 03-03-2011, 10:11 AM   #23
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(I just replaced all three u joints on my 97 tj. 4.0.. ?? )
My Wrangler has more U joints then three ??
When I did a 2.1/2 inch lift I replace all my U joints and a TC drop (3/4 inch )

My Wrangler had 80,000 miles and the old U joints needed to be changed out . It runs and drives like new and is rock solid . I bought the joints at NAPA .

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Old 03-03-2011, 01:39 PM   #24
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If you have a CV drive shaft you have three on the rear shaft. 2 on the front shaft and 2 on your front axle.
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Old 03-03-2011, 01:52 PM   #25
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If you have a CV drive shaft you have three on the rear shaft. 2 on the front shaft and 2 on your front axle.
Uh, he would have 3 on the front shaft as well, TJ's have double cardan joints at the T-case on the front drive shaft.
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Old 03-03-2011, 01:54 PM   #26
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There are Much Better ujoints available than Spicers.
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Old 03-03-2011, 03:22 PM   #27
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There are Much Better ujoints available than Spicers.
"Better" is a debatable term. There are stronger and more expensive u-joints available but I would argue that they are not actually better quality.

I run CTM u-joints on my front axle shafts but they are around $340 for the pair. To me, they are no better quality than the previous Spicer 5-760x I had there before the CTMs. The CTMs are just stupid strong with a lifetime warranty. I only run the CTMs there because of occasional forrays into Johnson Valley where even the Spicer 5-760x is normally strong enough when installed in a hardened alloy axle shaft.

Do you ever see me recommending CTM u-joints because they are stronger than Spicer? Nope, because Spicer u-joints are fine for 99 percent of us. I run Spicer 1310s in the front driveshaft, and one 1330 plus two 1350 Spicer u-joints in my rear drive shaft

Spicer's quality is excellent and good enough for 100 percent of us. Spicer's durability and strength is probably good enough for 99.9% of us offroaders.
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Old 03-04-2011, 08:38 AM   #28
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Originally Posted by Jerry Bransford
You haven't convinced me your rear pinion angle is correct, especially after you said "I believe my pinion angle is good". An improper pinion angle is, by far, the most likely cause of you going through u-joints. And I wouldn't use no-name house brand u-joints like you did either. Go with a quality u-joint brand like Spicer and personally, I STRONGLY recommend the Spicer 5-785x u-joint for the driveshafts.

Your pinion angle must (!) look like this or your u-joints won't last and you'll have drivetrain vibrations...
Hey Jerry. My rear drive shaft has 3 u-joints on it. At the transfer case there is two, it's in a cluster type assembly. I'm not sure what you call that, maybe a sye. The housing that the two ujoints by the transfer case says Spicer on it. Then there is the one at the diff. My ujoints were warranties so i got a free replacement and put the three life time Brute u joints in last night. The guy at advance auto parts was only showing two u joints on the computer. Does it have the third because of the sye? And the image you sent me of the driveshaft angle looks exactly like my angle also. Thanks :-)
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Old 03-04-2011, 08:41 AM   #29
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It has 3 becauce its a cv joint . And because its an aftermarket drive shaft for the sye
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Old 03-04-2011, 08:42 AM   #30
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Yep that joint with the two u-joints is a constant-velocity joint aka CV joint, aka double-cardin joint. That's an aftermarket driveshaft so it has three u-joints total and that is what you typically run with an SYE. The factory driveshaft only has two u-joints total, one at both ends.

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