So I have had an odd noise ever since I had the truck. Here's the symptoms...
Start up- no odd noises.
Take off- no odd noises.
Once driving 25+mph, I start to hear a noise when I am giving it throttle.
Let off throttle- noise goes away
Give it throttle- noise comes back.
Noise is hard to describe and cant really catch it clearly on a camera for ya guys, but it sounds like bearings or a chain or something, chattering kinda. If you had removed a ball from a bearing so there was room for the rest of the ***** to spin and slap each other is kinda what it sounds like. Or like what a loose cam chain on a dirt bike sounds like if anyone has heard that before.

I have replaced the timing chain last year with comp cam double roller-noise was present before and after so I can rule that out. I've replaced both u joints on rear ds and no fix there. I assume its not wheel bearings otherwise it would be present coasting at 70mph also not just when throttle is given. I changed t case fluid and seen the chain and was wondering if the symptom fits a noisey tcase chain?? Any other thoughts??

 

Detonation? Sounds like marbles in a can?

 

I guess it could sound like that, what would be the cause of this?

 

pinging. read the 10 mile long plenum thread.

try running higher octane gas. if the noise goes away, it confirms plenum.

 

Sorry I should have specified, also did the hughes plenum fix when I did the timing chain set..

 

what year is ur ram. If its 94-95 did you remove EGR? could explain pinging

 

its a 97 and its not a pinging noise. Sounds more like a bearing or chain noise.

 

could be transmission. automatic?

 

What kind of spark plugs are you running?

 

I wish it was a 5 sp but yes the 5.9 only came with auto. I dont think its the tranny because it could happen at 30 or 70 mph with throttle so its happening through out different gears.