Re: Rear end clunk & rumbling
noise from the rear end is usually a U-joint. The "on the gas off the gas" coorelation can be putting a load on the drive shaft and taking it off the drive shaft. Get under the truck and grab the drive shaft right in front of the differential and shake it . If it clunks and moves around, the U-joint is busted.
2004 XLT 4.0 4x4, 3" PA body lift, 32" BFG M/Ts, Dick Cepek DC-2 wheels, Euro tailights, self-painted headlight mod, NAV/DVD/XM/iPod stereo (Pioneer AVIC-D3), Line-X, Westin step bars, AVS bug shield and window vents