Rattling/Cracking Noise Under my Truck?

[KGTR312]

Just what the topic says. The noise occurs when I accelerate slowly from a dead stop for 3-5 seconds and stops. I use 4x4 this time of year due to bad road conditions. Most recent changes I did to my truck are 2 inch Levelling kit from RC, Black Bear Performance Tune and a Borla exhaust. I'm worried it might be my transfer case because I hear the noise coming from under the driver seat and also feel vibrations through my pedal. Any thoughts? I'm going to call my mechanic next week and see if he can find the problem. Thanks in advance.

[8.1HD/ALLISON]

Noises are hard to say without hearing them first hand. Does it do it in 2 wd also? I would do a good visual on everything(especially anything with the level kit) and maybe check all fluids as a starting point.

[KGTR312]

Yes, 2WD also. It's kinda hard to pin point the problem because it only happens when I'm driving. I wouldn't know what to look for also. Did a couple searches and it might be the heat shield and or exhaust. That was my first initial thought.

[8.1HD/ALLISON]

That is possible.

[Big D's H D]

We had the same problem with a Gmc canyon after a level kit install, we forgot to anti seize the splines and spot where the keys sit on the X-member thank god we had not sent it for alinement yet avery time consumeing mistake on our part ! Just a thought as it could be a place to look

Good Luck Dave

[KGTR312]

I found the problem... Long story short... It was the exhaust rattling against the chassis. Man I feel dumb and relieved at the same time.