Hey PK, Thanks for the info. I think it my be in the rear diff. also. Last week checked and replaced the cv axles because my boots were torn , it wasn't those humming. Yesterday I cranked the t bar and got 4in. lift in the front. I also put ome 919's on the back with Dayton 1.5 spacers along with old spacers and got 4in. lift in the back. all the suspension in the back looks good. I do need to figure out how to angle my pinion up cause when I put the 4in. lift on yesterday I get a small vibration at the u joint. Does anyone know what the tallest tire I can put under it with 4in. suspension lift? I can do some cutting and pounding. Ray.