Strange problem a Vibration at 65 mph

[ret27m]

Hi, I developed a strange problem, the other day my serp belt snapped, I got the truck (97 S-10 ext cab 4.3 V-6 auto) pulled right over didnt have time to overheat or anything. Went right out and got a new belt put it on and all was fine UNTILL I hit the freeway, now I get a vibration at 65 mph its there even when I pop it in neutral. I NEVER had the vibration until that belt popped. I did a little google research and found that others had similar problems like mine but I couldnt find a solution, anyone here know what I could do to get rid of the vibration??? Thanks

[OneLowSdime]

tires are not balanced

[ret27m]

Like I said no vibrations befor the belt popped, I was on the freeway doing 75 mph when the belt popped, BUT just to ease my mind I had the tires rebalanced...they balance was perfect...I'm at a loss, Oh also had the driveline checked at dealer it was in tolerance.

[2003s10]

you might have thrown your a/c compresser out of alighnment or your alternator or your power stering pump

[Yogi]

When you put it in neutral at 65 mph does the vibration change? Is there less vibration in neutral? Have you tried turning the motor off at 65?

[zhillz]

are you sure its just at 65 or at the same RPM throughout the different gear

[ret27m]

Thanks to the person that PM'ed me, you nailed it, it was just what you said THE BELT TENSIONER, I would have never gussed it. Thanks a million.

[uhlhazard]

the belt tensioner gave you vibrations, thats badass. I have vibrations in my pickup truck and will give that a try, got an oreilly lifetime tensioner years ago so I'll swap it out and see what happens.

[93v6banger]

as much of a smart elleck as im going to sound when i say this im not trying to be...how would a belt tensioner even do that?

[kjm762]

When the belt came apart, it might have damaged the bearing in the pulley slightly. Also see alot of the springs in the tensioners fail & make the assy wobble.