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Message: <blockquote data-quote="JDwhite98gt" data-source="post: 761151" data-attributes="member: 10517">OK mods first. Front:Tokicko Struts, MM cc's, Ford C springs, bumpsteer kitRear:Tokicko shocks, C springs, 4.10 rear (just rebuilt had to re-shim twice, but vibration existed before rear install), hotchkis boxed LCA's, replaced UCA axel bushings. The onlt poly bushings I have are in the LCA's and look ok. Vibration is above 55mph and somewhat subtle unless I lift my foot off the gas then whole car vibrates, sounds somewhat like Druuuum Drummm Druuuum. Feels as though its comming from the rear but steering wheel vibrates slightly as well and I can feel it in the floor and in my seat. Cant even make out what cars are behind me in the rearview while this is happening. Changed U-joints(Lifetime warranty Duralast non greaseable) last night and rotated driveshaft 180 degrees thinking it may be the issue....no change. Also do not now if it is related or not but sometimes when braking +clutch+ go to change gear the shifter will shake side to side between shift gates (braking+clutch+take out of fourth gear+neutral(shifter wobbles) +now into 3rd gear) dont know if that makes sense or not. I orginally thought it was a rear end problem so I recently had a friend who knew what he was doing install some 4.10's with master bearing kit but I did not rebuild the posi unit because I still burn 2 tires in a straight line or around a corner. I may need to road force balance the wheels and tires but I doubt thats my problem. Maybe a wheel is bent on the rear? I do not have a spare set of wheels to test this</blockquote>