Hey, just purchased a 84 f-150 4x4 stepside with a 302 for 500$ .148000 on odometer new seat new rebuilt carb and 33x12.50 buck shots camo paint job (stupid) Brushgard lights new radio and custom speakers and a pair of fuzzy dice my plans for this truck is a farm/fun truck I noticed when I drove the truck home it was roaring loudly but I couldn't determine where it was coming from I have sense changed out the tires checked transfer case fluid and trans fluid and rear end I replaced the driver side rear axle seal and examined the rear end which is positive traction and the ring and pinion gear had some wear but nothing excessive no large chips or cuts The noise only becomes audible to me when your going about 35 mph Any advise would be greatly appreciated Thanks in advance

 

Sounds like u joints. Start there if yiu cant find anything there check the radius arms

 

Thanks but I checked joints and radious arm bushings they seem to be good I believe I have slack in the pinion gear is their any way to test that?

 

Could be.. mine got to the point that when I clutched it the trucked jerked back and forth. And when I finally got to changeding it out. If was too late. It looked like a bomb went off in the rear end.. so id vet after it quick