PA Jeeps
The Garage => Technical Advice and Questions => Topic started by: Charlie on December 13, 2009, 03:31:38 pm
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Hi All,
On the way home from our club meeting my rig started a very noticeable vibration.
Accelerating some vibration. Slowing no vibration
Cruising at 30-40 MPH most noticeable vibration almost like driving on small rumble strips.
No clunking noises when starting or stopping.
Any ideas??
Charlie
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One of the (big) vibs I was getting was from the Front DS, and only from 45mph and up. It seemed that the garage that "did' my Lube just didn't grease the front shaft ??? So the Slip Joint was unbelievably warn and sloppy :o In fact I could reach up and shake the DS back and forth (not while driving, of course). The next time you're out and this starts, just put it in 4wd and see if it stops or lessens. Mine did, that's how I figured it was in the front half of the drive train. I ended up getting it rebuilt down (for me) at Quiggly's. You can crawl under and check both DS's to see if the Slip Joint has lateral play in it.
Maybe not, but just a thought...
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Didn't your Jeep just recently get BIGGER....?
Check those drive shaft angles.
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DEATH WOBBLE? no not angie either.
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Maybe the Tuna lost so much weight that he can't hold it down and with those 'winged" fenders it wants to fly... ::)
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Took it out again.
At 25 MPH it starts under normal acceleration, it stops when I get off the gas. It only vibrates when on the gas, even if it's slight pedal.
Nothing when I start out, nothing when coasting.
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Time for an nice new SYE set-up! ;D
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Take a close look at the U-joints with the recently added lift I would be suspect of drive line angles. It doesn't take very long to burn one out. Or if it had some wear on it the increased angles finished it off. Check this sooner than later cause if it breaks it can take out the T/C. Most times when the joint starts failing you will get a slow speed squeak. If it's not the joints make sure the axle U-bolts are still tight. Good luck
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X2 on what Dave typed a minute ago.
Ted
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DEATH WOBBLE? no not angie either.
Nope, I didn't mess with Charlie's Jeep--I had my own mechanical problems today. Hope you get it figured out, Tuna!
P.S. Thanks to all who stopped to help, give advice, and call to see if I got home OK. It's nice to know that some people really care!
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Time for an nice new SYE set-up! ;D
This is what I did, except I used a bolt...
naxja.org/forum/showthread.php?t=959008&highlight=rear+drive+shaft (http://naxja.org/forum/showthread.php?t=959008&highlight=rear+drive+shaft)
Worked for me ;D
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I do have a SYE in the rear, did that a few years ago preparing for the new lift.
I have a little squeak now and then and must have a U-joint taking a crap on me someplace.
I put the thing up on jack stands and wiggled and wobbled and shook and turned wheels and I can't tell nothin! Everything is a tight as a Nuns whatever.
I'm just gonna have to wait and see what falls out and then fix it. It came on real sudden and has changed characteristics since it started yesterday.
Yours Truly,
Dazed and confused.
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Charlie,
If your 35's fall off, I'll store them on my jeep for you. ;D. Actually, I think you're front heavy with that winch - your new rear bumper wasn't heavy enough. Again, I can store that winch on my jeep as well. ;)
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Chip, You are a trip! :D
I appreciate all your suggestions! Not everyone would be so gracious. ;)
Charlie
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In all seriousness, the suggestions on U-joints might be on the money. Prior to doing my front axle U-joints, I had a slight vibration at 55-60 mph, not much and not above or below. I always thought it might have been tire wear, but it went away after I did the u-joints. Could it be the hub units are seated better? Probably not, so it might very well have been the u-joints. Did not touch the driveshafts at all, just the front axle u-joint replacement.
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I have a little squeak now and then and must have a U-joint taking a crap on me someplace.
I'm just gonna have to wait and see what falls out and then fix it. It came on real sudden and has changed characteristics since it started yesterday.
Yours Truly,
Dazed and confused.
Dear Dazed and confused,
You'll need your winch with that approach to troubleshooting u-joints. Mine were tight as well - from the rust, not from proper condition :P
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Charlie sometimes you have to remove the shaft and see how smooth (or not smooth) the joints move. Look for rust or black powder at the rubber seals on the caps . You can try isolating the frt to the rear by driving with one of the shafts out.
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Thanks Dave, I have to get some time under the thing.
I assume I can still wheel on the 26th, what do you think?
I can work on it all week after that.
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"I assume I can still wheel on the 26th, what do you think?"
I don't know Charlie You're going to have to answer that one. If the lift is just settling and your getting some driveline vibs, you'll probably be ok but if it a joint you can't predict total failure ask Jim Haffy ;)
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I assume I can still wheel on the 26th, what do you think?
Tuna: I wouldn't wheel it at Rausch Creek until I figured out the source of the vibes... unless you are bringing it up on a trailer. If that's the case, wheel the pi$$ out of it! ;D
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Lets see the "dangerous" driveway, "nasty" heated grarge 8) -OR- The comfort and safty of the side of the road of I-81 with a big rig inches away from your boots. :o
Find the vibe ;)
Pull the shaft put it in 4Hi see if it goes away. If it does pull the pinion joint out of the shaft and take it apart. Jessy said his double cardian end hardly ever goes out, always the pinion end because of the steeper angle.
Ted
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Hey Mike, Charlie's got round headlights too. Hmmmmmm........ ???
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Hey Mike, Charlie's got round headlights too. Hmmmmmm........ ???
Chip: Did you post this before or after your Jeep went out of commission? :o
(My square headlighted one is spending the evening in a warm garage getting new motor mounts...) ;)
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Posted after my dead jeep. Trying to warn Charlie ;)
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"FOUND IT" or them!!!!
I have a front passenger side wheel bearing going out (squeak) and one of the U-joints (vibration) in the rear at the double cardigan finally showed itself.
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Charlie, I wanted to ask: Does your Jeep still fit inside your garage at its new height? I remember the photos you took of Colli's being so tall!
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Good job, be sure the wheel bearing issue is truly bad and not the axle u-joint. Hub bearings tend to roar rolling down the road changing volume when sawing on the steering wheel ,as opposed to a u-joint that usually squeaks. When spinning the hub in your hand it will feel rough. Of course once you have the hub assembly out it's just a matter of sliding the axle out you may want to change the u-joint as preventive thing. You're there working on so I'm not second guessing you,but the price difference between the two warants a second or third look.
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Dave,
I'm not ruling out a U-joint and it could be the bad one making the squeaking noise. It's hard to tell where the squeak is coming from. However, When I grab the front tire I can wiggle it a bit, the other side is nice and tight. The bearing does not sound real rough but it's a Little different from the other side.
I have replaced both front wheel bearings on Michael's XJ, they were very bad, I know what that sounds like. :o
As far as the U-joint that's bad..it's bad! I believe one cup is fresh out of needle bearings and the joint flops a little when moving the rear driveshaft....It did not do that the other day.
It's a matter of finding some time to fix it up now. :-\
BTW...Unless I get her fixed up I won't be wheeling on the 26th. :'(
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Wobble,
My Jeeps fits just right, Collie had the light bar sticking up on hers and her rig is a little taller than mine to boot. :-\
I still have an inch or so of roof clearance, enough to get 36's on it. 8)
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Yep if it's got play in it, it's bad I'll tell you the way my boss tells me at work . "Well it should only take you a few minutes to fix that, just zip out" what a DH he is.
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Charlie,
If you don't have a press for the u-joints, I have the proper size sockets and a 12 pound sledge. I can even show you how to get your hand properly placed to make sure it gets between the socket and axle to optimally take a chunk out of it :o
I think there might be something to this round vs. square headlight thing. All this snow and there are at least 3 of us "round" type jeeps out of commission. Of course my wife's Liberty has round headlights and that's still working......I better stop typing. ;)
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I may have the beast ready to wheel by the weekend. 8)
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All fixed and ready to go.
Thanks Ted for helping put the CV shaft back together.