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Unread 07-28-2006, 12:58 AM   #1
dbtolman
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Popping in front when taking off, or speeding up

Independant of whether or not the wheels are turned, I get popping noises when I hit the gas a little harder than normal to get some extra speed. They "feel" like they're coming from the differential up front, but I've had one bad axle replaced, and had the entire third-member, and pinion bearings replaced and the noise is still there.

Before I had the diff worked on, and after the axle was replaced, it bound up and popped very loudly as I turned the wheels right and backed up. When it did this, it actually shook the front end of the jeep up and down as I pulled out and it stopped popping.

It's a 95 GC, Full-Time 4WD. Over 100,000 miles.

Idea's? Viscous Coupler???

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Unread 07-28-2006, 01:04 AM   #2
GreenDean
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I would say bad CV joints but I dont think they used them yet in 1995.
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Unread 07-28-2006, 01:30 AM   #3
dbtolman
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They did, actually. I replaced the right axle, complete with new CV, since it was bad and the popping seemed to be coming from that side. After that, it felt like the popping moved towards the center... The other CV Joint and Axle are fine.
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Unread 07-28-2006, 01:58 AM   #4
zjhitman
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I would check two things. Motor mounts and the ball/socket joints at the upper ends of the front sway bar. You may have to use a pry bar to check the joints if the rubber boots are still intact. What is underneath is basically just a small ball joint. They cannot be lubricated and over time they wear out and the ball chews it's way out of the socket. Mine had over .25 inch vertical play and it took me a long time before I found where the popping was coming from. The ball end of the joint is attached to a tapered stud that goes up thru the sway bar and has a nut on top. They rust up inside and can be a bear to get apart.
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Unread 07-28-2006, 05:59 PM   #5
fr3db3ar
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Wow..your jeep has a 3rd member up front??? I want that version oke:
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It's true that I'm old enough to probably have been there and done that....it doesn't make me an expert....it gives me an educated opinion.
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Unread 07-28-2006, 06:08 PM   #6
dwills898
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I have similar very loud popping when accelerating, i think mine is coming from my transfer case, it is leaking allot of fluid, i took the front driveshaft off and the popping stoppe.
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Unread 07-28-2006, 09:16 PM   #7
anticrombie
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Bad u joints in the drive shaft?



Charlie
(Did y'all miss me? )
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Unread 07-28-2006, 11:18 PM   #8
dbtolman
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Remembered that my tranny mechanic pulled the txfr case apart and inpsected it when he did my tranny, and today I called to talk to him... He said that the Viscous Coupler is good, and everything else in the txfr case is good... So, now I know the Diff and Txfr case are good... Barring suspension issues or mounts, is there anything else simple that I can look for, given that the two complex parts are OK? I'm afraid to drive it now, since I don't know what's wrong!
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Unread 07-29-2006, 12:49 PM   #9
joeyschribar
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Quote:
Originally Posted by dwills898
I have similar very loud popping when accelerating, i think mine is coming from my transfer case, it is leaking allot of fluid, i took the front driveshaft off and the popping stoppe.
\

modt likely the chain in your t-case is loose and slapping around in the caseing, i had the exact same problem, and when the front driveshaft was out, the noise was gone as well,/// i hope that helps you!
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Unread 07-30-2006, 08:19 PM   #10
dbtolman
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Quote:
Originally Posted by joeyschribar
\

modt likely the chain in your t-case is loose and slapping around in the caseing, i had the exact same problem, and when the front driveshaft was out, the noise was gone as well,/// i hope that helps you!
Is this something that could easily be overlooked when a mechanic has the case apart? If so, perhaps I simply need to buy a good, used Txfr case... I actually use the 4WD feature, so I'd rather keep my d-shaft in place...

Thanks for the info!
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Unread 08-01-2006, 08:58 PM   #11
dbtolman
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Well crap.

Been OK, not popping on turns for awhile... Today, I made a turn and the popping was worse than ever, and didn't "unbind" and start driving again so quickly... In fact, when it was doing this, if I let off the gas (even on a down-slope), the vehicle wouldn't go until I straightened the wheels, and gave some gas to unbind the (whatever the &%^% it was)...

Sounds like CV Axles, right? Only, of course, I've had them checked out- and one of them was bad and replaced... Plus, there's the rebuilt diff, txfr case, etc., which all check out well... So I'm VERY confused now. (

Also,
HELP!
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Unread 08-02-2006, 06:14 PM   #12
Wilder
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I've had the same issue with my 94 GC.. would "pop" when changing direction, or pop when first applying the brakes or accellerating, worsened if the actions are more demanding then normal. I dug through everything on the front end. Drive shaft, axles, steering, ball joints, sticking brakes.. everything. i was about to give up, and laying under the jeep thinking happy thoughts when i noticed the transfer case crossmember was loose on the one side... Applied some blue loctite, tightened it back up, and hasn't made a noise since.

Another time on my old ford ranger, i had a popping sound from the front, and it even locked up the front end when in 4wd. Turned out that one was teeth coming off the front diff. By the time i got out of the spot we were 4x4ing, it had pretty much chewed all the teeth off the ring, and even punched a hole in the diff housing..

But in the middle of nowhere, i did all i could in 2wd to get out of that situation. besides, a jar full of metal teeth looks good on the shelf with the rest of the broken parts.
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Unread 08-03-2006, 01:44 PM   #13
skier4life16
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Quote:
Originally Posted by anticrombie
Bad u joints in the drive shaft?



Charlie
(Did y'all miss me? )
Ya that is probably it. CV's make more of a slapping sound and its usually when your turning. My 96 GMC Jimmy made a clicking noise when I first got going, or accelerated and it was a U joint.
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Unread 08-04-2006, 05:59 PM   #14
dbtolman
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When in neutral, and rolling, the Drive-shaft will still turn since it's connected to the diff, RIGHT?

If that's the case, I guess the U-Joints could be going bad... When I'm turned all the way to one direction or the other does that put more stress on the U-joints in the driveshaft? Dumb question, I know, but I'm grasping here...
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Unread 08-04-2006, 09:11 PM   #15
Virmagicus
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Check those U-joints, if they are ok it is the chain in your TC, it has devloped some slack.
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