My truck has a very strange boom boom sound/vibration when I accelerate.
It gets louder the more I step on throttle, not when coasting or on release, and it gets very loud and very noticeable.

It's is not coming from front drivetrain, or rear drivetrain.

It feels like from transmission or TC area.

Can the engine mounts go bad (they look very simple) ? I thought about exhaust , but i just installed a new 4" turbo back and didn't change a thing.

 

Exhaust leak... Loose pipe... Bad hangars???

Remember the exhaust goes down pass that transmission / transfer case...

 

Sounds like the dreaded torque converter clutch is slipping, but I'm a manual trans guy, maybe the auto trans guys could chime in?

Tom

2001.5 2500 4X4 5-Spd LB QC Black. Catcher ECM, DD Stage-1's, AFE, Bully Dog 4" pipe, ATS Exhaust Manifold, Silencer Ring MIA, JAKE Brake w/shifter switch, Geno's Banjo's, 3 Autometer's on the A-Pillar, Gear Vendor's O/D, Firestone Air Bags, Redline Oil throughout.
Soon-to-have 14cm Turbo Housing and RASP Pump (Thanks Olee!!)