sounds like a muffler heat shield......
CK5
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Driveline noises to identify(pics/vids)
- Thread starter Cancleaner
- Start date
Cancleaner
1/2 ton status
Cancleaner
1/2 ton status
I would agree... this is the only thing we could find today that was loose..
stuffed an old shirt in between it for a test and all. Muffler has no shield. I am on budget to re pipe the whole exhaust very soon, like this week, due to the supercharger.
texas4x4rebel
1/2 ton status
That looks normal.
Cancleaner
1/2 ton status
I guess if every one is in agreement that this noise definitely isn't a drive line issue or major, I'm HAPPY! 
Didn't look all that bad. Its been a long time since I did that, but I have seen that much slop in a good rear end.
But, its so subjective, its hard to tell from watching. Its the kind of thing that you feel more than see.
Its more than you would see in a new rear end, and might even be excessive. But, I did not hear the noise when you did it.
Might try doing it a lot harder just to see if it makes the noise.
Can you get it to make the noise at low speed by "blipping" the throttle? In other words, just idling along, and giving briefs spurts of gas and instantly backing off the gas to make the drive train surge back and forth?
If you can, then it becomes more likely that its in the drive train instead of a rattle.
Failing all that, have you considered buying a louder radio.............?
Cancleaner
1/2 ton status
nope, this old truck hums along just peachy until cruise, or let off the throttle and coast.
I actually followed TexasRebels' advice on another topic. "Just go lay into it and see if it makes boost." I did and the truck sounds tuff as hell, no rear end noise.
And BTW, Thanks texas4x4rebel, I did just that and got boost
Just re read you post sorry, I haven't tried it just like you described. That video and all my test drives were at low speeds, ( 20 MPH or less) didn't do that to the throttle. It seems to take a second or to for it to rattle at me
change your u-joints... that's generally when they'll make noise... for under $50 it's cheap insurance to know they're fresh.. or at least try greasing the he!! out of em, if the noise changes, you found it..
that looks like pretty normal pinion slop... to check the joint itself a bit better, do the same thing, but hold the yoke while you try to move the shaft... failure will be an ever so slight movement...
that looks like pretty normal pinion slop... to check the joint itself a bit better, do the same thing, but hold the yoke while you try to move the shaft... failure will be an ever so slight movement...
Cancleaner
1/2 ton status
OK. Will do... On that note, I have never seen u joint like this. With the "bolt" like they are.
Yah... the BS blocks have got to go! DIY shackle flips being ordered next week
The idea of doing that at slow speeds is to slam the drivetrain back and forth. If its in the drivetrain, not only will that usually show it up, but it may make the noise louder and at a slower speed where someone standing outside as it goes by might tell where its coming from.
However, I thought of another idea.
Put it in park or neutral, foot on the brake, and rev the engine about 1/4 throttle and let the throttle snap shut.
Just dump your foot off the pedal.
Don't wind it up too high, but good revs and then back off suddenly.
If it makes the noise then, odds are its the exhaust somewhere.
If not, then just for fun, if its an automatic, don't remember right now, then open the hood, put it in gear, and keep your foot on the brake.
Give it some gas while someone stands out of the way and watches the engine.
MAKE SURE there is no one in front of it, and its aimed in a safe direction in case the brakes fail.
The engine should twist slightly inside the engine compartment.
Also do it while someone watches the transfer case and transmission from the side.
If you see excessive movement, such as the engine trying to climb out from under the hood, or the transmission jumping around, then your motor mounts are shot or the transmission mounts need replacing and that might be the problem.
However, I thought of another idea.
Put it in park or neutral, foot on the brake, and rev the engine about 1/4 throttle and let the throttle snap shut.
Just dump your foot off the pedal.
Don't wind it up too high, but good revs and then back off suddenly.
If it makes the noise then, odds are its the exhaust somewhere.
If not, then just for fun, if its an automatic, don't remember right now, then open the hood, put it in gear, and keep your foot on the brake.
Give it some gas while someone stands out of the way and watches the engine.
MAKE SURE there is no one in front of it, and its aimed in a safe direction in case the brakes fail.
The engine should twist slightly inside the engine compartment.
Also do it while someone watches the transfer case and transmission from the side.
If you see excessive movement, such as the engine trying to climb out from under the hood, or the transmission jumping around, then your motor mounts are shot or the transmission mounts need replacing and that might be the problem.
Cancleaner
1/2 ton status
U-joint angularity looks fine. You have "strap style" cup retainers...
that u-joint looks ancient, I'd bet it's on the way out.. they'll do that, not have any play, but as they begin to fail, they'll start to make noise.. bet if if ya drive it around for a couple weeks, you'll find noticable play and worse noise...
DieselWarrior
1/2 ton status
40 bucks to who ever finds the damn noise!!!
Stab in the dark... BUT...
Andrew
Last edited by a moderator:
4xcrazy
3/4 ton status
Kind of an odd one, but if you still have it installed, check the support rod, passenger side of the t-case/trans,, it connects from the side of the t-case up to the trans bell housing. I broke a bolt out of the trans bell housing once, rattled quite a bit.
Cancleaner
1/2 ton status
Alright everyone, I found out whats up. (99% sure)
Cat has something rolling around in there and rear end back lash is outta whack. So I've been told my shop mechanic. Started my search for a 14 bolt and a shop to re work my exhaust.
Any leads on a 14 bolt appreciated
Cat has something rolling around in there and rear end back lash is outta whack. So I've been told my shop mechanic. Started my search for a 14 bolt and a shop to re work my exhaust.
Any leads on a 14 bolt appreciated
rockhard69
Registered Member
Hello, I will take your reward, it is a bad driveshaft u-joint. You can have one going out and you will only hear it upon sudden load changes. It will move slightly under load and then seat itself and feel fine. Some people think if they are bad you will have slop when you rotate the driveshaft by hand. It is true on ones that are really bad.
It is worth the look, I lost a bet with a mechanic on a old chevy 4x4 I had before. I never would of thought it was bad. He found it by leaning over the side on the bed in the parking lot. JMHO.
It is worth the look, I lost a bet with a mechanic on a old chevy 4x4 I had before. I never would of thought it was bad. He found it by leaning over the side on the bed in the parking lot. JMHO.
