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Discussion Starter · #1 ·
ok my jeep just started (friday afternoon) this weird tick/crackling sound when i start it up(after it sits a couple hours) and the noise stops when the temp gets about 150* or so
......the noise only happens when im rolling above 20mph +/-, and does not change with speed or rpm's. all of the gages read good. wbcarver heard it yestarday and could not figure it out.......it sounds like its comming from behind the driver/passanger seating area......plus if i shift from 2wd to 4hi the sound gets "lighter" and almost quits......could i have a stretched chain in my np231
????? any help would be great......im going to check the fluid level in the t/c to just make sure its not low.......

later
john
 

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Time bomb????
Didn't piss off a buddy lately, did you.

(remember I know some of the people you hang with
)

Not sure other than that.
 

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In reply to:

could i have a stretched chain in my np231

[/ QUOTE ]

Everyone always suspects the chain because of rumors of it being weak. That's the reason no one likes the quadratrac too. Those chains are very strong. I really doubt you've stretched the chain.

Check your u-joints and rear wheel bearings.
 

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In reply to:

your right.........might be brent.....i think he's mad cause my jeep has heat in it for winter tim

[/ QUOTE ]

I plead the fifth on the basis of Self-incrimination....

did you check the Driveshaft for Zipties?


J/K!

Swing by some time, I want to hear the noise...
 
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I had a similiar problem sound coming from my front right wheel, I got louder as I turned to the right. I torn the hub down and it was the inner bearing, and in turn had messed up the locking hum. It had been producing a kind of repetative ticking sound until I got going faster, above 20-30 then it would stop. Just jack the wheel up and try to wiggle the wheels, they should not move back and forth, or up and down for that matter.

Hope that helps
 

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I told Brent *not* to leave that dirt clod in the axle tube (up on Schoolbus), but NOOOOOOO! He said it was a goodluck charm and you wanted something to remember the trip by...
Like that crapped alloy shaft and handfull of shrapnel isn't enough.


That's also the problem with new Jeeps. To dang quiet! All that does is let you hear all the squeaks & noises bringing on paranoia. Rip that sissy muffler off and you wouldn't be able to hear the normal sounds!
 

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OK, I heard the noise last night... All i can say is WEIRD!

It's not so mucha crackleing as it is a chirpping or actually it sounds like a cricket. Starts at about 20 mph, and goes until it dissapears. Has nothing to do with the heat of the engine, But I think it has to do with the Tranny/T-case or Driveshafts. Dropping the T-case into 4hi while rolling down the road does make the sound change and become lighter. If i had to guess it sounds like a dry part that eventually gets Lube to it and goes away. I confirmed that his Driveshaft U-joints (front and rear) all feel good and solid and dont' seem to be the culprits. the rear U-joints are only about 9K miles old, the Front are the Factory ones tht are sealed. to me it doesn't sound like it's coming from the back but rather the Tranny T-case area.

doesn't sound Terminal, just one of those annoying sounds that shouldn't be there. and like Dave said, you'd only hear it on a new Jeep
 

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Discussion Starter · #11 ·
thanks guys

i wonder if it might have to do with needing a t/c fluid change
.........i think i bought the autozone brand atf fluid to go in the np231......wbcarver said that the autozone brand atf stuff is crap
(what do you guys think) so do you guys think a t/c fluid change would be a good idea????? thanks brent for checking it out
....i didnt know if i was going crazy or if the voices in my head changed to a pack of crickets


later
john
 

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Discussion Starter · #13 ·
Re: thanks guys

In reply to:

Is there a speedometer pickup in the T-case? Maybe it is "chirping".

[/ QUOTE ]
why yes there is
, i wonder if there is dirt/crud on there that might need cleaning out...........but for and update..........since it been warmer in the mornings the noise is gone so im guessing that its a seal thats having to expand or something......its funny...........or bret took the bomb off of it......one of the 2


later
john
 

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Re: thanks guys

actually no I didn't .. you better get back under there and take care of that...
 

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Discussion Starter · #15 ·
Re: thanks guys

thats that esplosion i heard a lil'bit ago.......
......and i had one more payment and it was mine


later
john
 

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Discussion Starter · #16 ·
found the problem

i was up a wbcarvers w/ brent this weekend and decided to looks for the noise.........well i hit the u-joints and slip spline (on DS) with a grease gun....well i forgot that the u-joint (SYE kit w/ cv ds) at the t/c yoke needed a neddel fitting to grease it
.....well then i thought about when i put the SYE in i didnt shoot grease in that u-joint but packed some in there.......well after shooting a ton of grease in there the noise has stopped......
thanks bill for your tools and brent for calling me a dummy


later
john
 

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Re: found the problem

I had a rusty u joint that did the same thing. Kinda of a chirping noise as I pulled away. I discovered it when I put my hand on the joint and noticed it was hot to the touch. It was not an old joint, but it had taken on water and not been properly grease afterwards.
 
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