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Old 06-18-2011, 11:22 PM   #1
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Strange Clinking noises, and now wobbles.

I bought my 92 yj a week ago, fixed a couple issues, dirty carb, throttle return spring, cosmetic stuff, and then it was great. Took it off road a few times, drove it daily, and this morning it was making weird pinging, almost clunking sounds at random. It almost sounded like it worsened with acceleration? I didn't have the time to look at it so I kept driving it a few more time today. Good news is the noise is gone. Bad news is I have wobbles that shake the whole cab, you can feel it in the wheel, the floor, the pedals, everywhere. It's scaring me. I don't want to drive it. I was thinking maybe a pin or screw broke off/came loose somewhere underneath in the driveshaft or something. I'm not EY mechanically inclined however. Any ideas?

1992 4.0 YJ, 4" lift, 33" BFG all terrains.

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Old 06-18-2011, 11:37 PM   #2
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U-joints

Check all your U-joints, even the axle U-joints. Sounds like something is out of balance.

Was the lift done correctly? do you have a transfer case drop kit? slip yoke eliminator kit?

Anything done to correct the rear pinion angle?

And you don't have a carb, you have a throttle body and multi-port fuel injection. Providing it's stock.

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Old 06-19-2011, 12:12 AM   #3
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Well the previous owner had three of the four wheel u joints replaced recently. It's dark, and all I could really do just now is grab my drive shaft and give it a wiggle. It spins about an inch back and forth with my hand. another 1995 yj next door doesn't move at all. I don't know what I'm looking for. Are there pins in u joints? It looked like it. My uneducated guess was a pin came out and that caused the noise and the vibration...

Also as far as I know the lift was done correctly... Nooo idear. I could upload pictures in the morning
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Old 06-19-2011, 12:55 AM   #4
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I agree with YJ 93 Ben on the U-joints. When you can in the morn, take pics of the u-joints, spring shackles, drive shafts and the track bars and sway bars if they are still attached. The photos should help us diagnose any issues you may have.

Oh, and welcome to the forum.

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Old 06-19-2011, 01:01 AM   #5
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Thanks Jeff! The end links in my sway arms are disconnected but still there. And I'm not sure what track bars are... I anticipate I have a lot of learning to do. From everything I've researched it sounds like a blown ujoint. Tomorrow morning I'll upload pictures and possibly a video of the movement in the driveshaft.
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Old 06-19-2011, 03:16 AM   #6
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If it's as bad as you described, you'll see it in the light of day. If it is the U-joints you may now have driveshaft and yoke issues. I think you'll be replacing U-joints and straps, at least, in the near future.

Let us know whats happening.
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Old 06-19-2011, 09:20 AM   #7
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I agree, check your u-joints.
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Old 06-19-2011, 12:46 PM   #8
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So should I not drive it at all? I'm guessing not.. Ill be uploading pictures soon.
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Old 06-19-2011, 12:52 PM   #9
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I wouldn't because if it snaps you will be looking for a ride home lol... and a tow.
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Old 06-19-2011, 02:31 PM   #10
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So how much is a new ujoint and strap? And could I do it myself? Can the part be found locally?
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Old 06-19-2011, 04:21 PM   #11
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It sounds like I have the same problem. Except my drive shaft is solid when I try to move it. I'm pretty sure I've narrowed it down to my transmission mount. When I installed my lift it looked like the mount came in half and the skid plate came clean off. I don't think its supposed to.
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Old 06-19-2011, 04:41 PM   #12
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Quote:
Originally Posted by YJman
It sounds like I have the same problem. Except my drive shaft is solid when I try to move it. I'm pretty sure I've narrowed it down to my transmission mount. When I installed my lift it looked like the mount came in half and the skid plate came clean off. I don't think its supposed to.
Doesn't the skid plate under the tranny hold it in place...?
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Old 06-19-2011, 06:44 PM   #13
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It's easy........

Quote:
Originally Posted by Swanktify2 View Post
So how much is a new ujoint and strap? And could I do it myself? Can the part be found locally?
.....if you have the right tools. The availability is good at any parts stores.
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Old 06-19-2011, 06:53 PM   #14
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Yep

Quote:
Originally Posted by YJman View Post
It sounds like I have the same problem. Except my drive shaft is solid when I try to move it. I'm pretty sure I've narrowed it down to my transmission mount. When I installed my lift it looked like the mount came in half and the skid plate came clean off. I don't think its supposed to.
If you pulled the six bolts holding the transmission skid pan up and didn't remove the two nuts holding the tranny mount, and it "came clean off" your transmission mount is broken. You did replace it(trans mount)when you had it apart, didn't you?
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Old 06-19-2011, 08:12 PM   #15
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UPDATE:

It was my u-joint at the transmission output shaft. I did some googling and youtubing and replaced it in about an hour. Thanks for your help everybody! The jeep rides so smooth now..

One final question, though. When I removed my driveshaft my transmission pissed fluid onto pavement. How do I fill it again? Do I need to fill it? Where? With what kinda tranny fluid? I just put the shaft back in... I don't know how to check the fluid level.

My output shaft was leaking, too before I did this work. Will it still leak? Was it leaking because of the play in the driveshaft? Is there some damage to speak of? Is it repairable?
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Old 06-19-2011, 09:42 PM   #16
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Here's a pic of the back of the transfer case showing the fill and drain plugs. The fill plug is the higher one. It takes atf, atf +4 is what haynes says, but I'd think any aft would be ok. Just pull the fill plug and add fluid until it starts running out. Replace the fill plug and you're done.
A far as the leak goes changing the u-joint shouldn't effect it any. The the seal is probably leaking and needs to be replaced. The hardest part of that is pulling the driveshaft, and you've got that mastered
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Old 06-19-2011, 11:06 PM   #17
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Thanks for the help tye!

Soooo how do I replace that seal? Is it something I can use liquid seal for like the rear differential I helped rebuilt? I'll do some research, but personalized input is always more than welcome.
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Old 06-19-2011, 11:07 PM   #18
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It's a Jeep thing
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Old 06-20-2011, 04:32 PM   #19
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Quote:
Originally Posted by yj93ben View Post
If you pulled the six bolts holding the transmission skid pan up and didn't remove the two nuts holding the tranny mount, and it "came clean off" your transmission mount is broken. You did replace it(trans mount)when you had it apart, didn't you?
Nope. The skid plate came clean off and I said to myself, huh, how is the tranny being held in place if there's nothing holding onto it! But I didn't bother ordering a new one because I didn't have the time to wait for it to come in.

Buying a new mount this week and replacing it. Can't wait to get rid of those vibes.
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Old 06-20-2011, 04:34 PM   #20
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Originally Posted by Swanktify2 View Post
Thanks for the help tye!

Soooo how do I replace that seal? Is it something I can use liquid seal for like the rear differential I helped rebuilt? I'll do some research, but personalized input is always more than welcome.
My seal busted when I was pulling my Jeep into my uncles garage to install my lift. Ironic huh?

I just went to autozone and got a new one. Problem solved and I'm a happy camper.

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