BAD VIBRATION

[NSTLLMNGR]

AS SOON AS I REACH 94MPH WITH THE SPEED LIMITER SET AT 130 I AM GETTING A BAD VIBRATION FROM THE DRIVETRAIN I THINK .. IS THERE SOMEOTHER LIMITER I MISSED . AT FIRST I THOUGHT IT WAS THE ROAD , BUT IT WASNT . 94+ CAUSES STRONG VIBRATIONS

[Zick]

Vibration have nothing to do with anything in the tune. There is something mechanically wrong with your truck. I would check alignment, wheel balance, and possible driveshaft balance.

I had a slight vibration cause by a bad U-joint in the driveshaft.

[NSTLLMNGR]

the reason i thought it was something in the tune is because it does it right at 94 mph where the original speed limiter was at . i was thinking maybe some sort of fuel cut off or spark , maybe some thing in the tranny or abs controller? ill play with somemore .. the truck only has 250 miles on it.

[RoninsDenali]

Ouch 94mph... You're going that fast with only 250mi's on it...?:huh2:

That would be your unbalanced driveshaft going crazy shaking the hell out of the rest of the drivetrain... Unless you want to start replacing ujoints, etc. i would suggest keeping those speeds to a minimium... I know its hard, my Yukon starts shaking like hell at about 112

[jimmyblue]

Alignment, or big goofy truck tires can also have a
nice vibration potential.

[NSTLLMNGR]

i think a weight came off the driveshaft . there is a spot that looks like something was stuck to it..

[NSTLLMNGR]

Ouch 94mph... You're going that fast with only 250mi's on it...?:huh2:

That would be your unbalanced driveshaft going crazy shaking the hell out of the rest of the drivetrain... Unless you want to start replacing ujoints, etc. i would suggest keeping those speeds to a minimium... I know its hard, my Yukon starts shaking like hell at about 112

shit my tahoe wont go past 90..

[jimmyblue]

I'm not too up on later trucks, but have seen that
there can be several "layers" that do the same
thing, with the drive-by-wire throttle overlaid on
the older-style control methods. That is, you may
have an ETC throttle based speed limiter in one
page, and an old style fuel-cut limiter somewhere
else like in System>speed limiter section. Go
through the whole tune, pane by pane, and see
if there's another speed limiter hiding in the
woodpile.

[MNR-0]

Is it an auto? Check your TCC lockup points - could be converter apply at that speed and not enough lockup line pressure causing it to slip and vibrate