One of the fleet maintenance mechanics here at work used to work at a Ford dealership back in the '60's and '70's and said Ford put out a service recall for our trucks back in the day because they would flex and the back wall of the cab would go 'boom'. The biggest complainers were three speed on the column trucks, but four speed trucks would do it too. Supposedly when you shifted from 1st to 2nd the frame would torque over causing the wall the buckle enough to 'boom'. The fix was to pull the gas tank and put a lead or steel weight on the rear wall. He said it was self adhesive and fixed the problem. It makes sense because these trucks have the sound dynamics of a steel drum. I've never seen one (in my limited experience) and hope he's not pulling my leg. So, anyone ever seen one?
Dalton Sexton
1972 LWB 4 in floor T-18 tranny. w 360ci engine. tires 31 x 10.5 r15. F250 suspension w rear helper springs. Electronic ignition from 78 ford t-bird 400 cid. Plug wires to fit 1980 F150 460ci.