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Mad vibration
- Thread starter TwoTonedRoush
- Start date
Their is a TSB out for both the rear half shafts and the drive shaft.
The half shaft vibs seem to happen at lower speeds, while the drive shaft will happen at highway speeds, this is per the TSB anyway...I had a HUGE vib, felt like I had a dildo stuck in my ass, turned out I bent my libery 26 spline input shaft.
On the subject of the 12 mm bolts, your correct they should be 14 mm bolts but they won't give you any type of vibs, just a glunking noise...
What are the mods on the car?
Kevin
The half shaft vibs seem to happen at lower speeds, while the drive shaft will happen at highway speeds, this is per the TSB anyway...I had a HUGE vib, felt like I had a dildo stuck in my ass, turned out I bent my libery 26 spline input shaft.
On the subject of the 12 mm bolts, your correct they should be 14 mm bolts but they won't give you any type of vibs, just a glunking noise...
What are the mods on the car?
Kevin
I had the vibe problem too when I first got the car. The driveline would vibrate between 60 and 70 mph and be so severe that the rear-view mirror became blurry.
The dealer replaced the driveshaft which basically moved the vibe up to 80 mph instead of 60 mph and reduced it slightly. Since I almost never drive 80 for extended periods, this was acceptable.
The dealer replaced the driveshaft which basically moved the vibe up to 80 mph instead of 60 mph and reduced it slightly. Since I almost never drive 80 for extended periods, this was acceptable.
Tell you the truth Cliff, I think whoever installed your gears, installed them worng..Just my .02
Kevin
steering wheel shaking is in the front. if you feel it in your butt coming through the seat, its in the rear. rpm-dependant vibration is in front of the trans, speed dependant vibe is trans and rearward.
shitty tires will still balance, and a bent wheel will balance if you add enough weight. but it will still vibe because its bent...
as always, check your wheel bearings.
as far as two tone roush's problem goes, i'd say the poly diff bushings most likely have the pinion at the wrong angle. it should be parallel to the engine's angle. you could also try re-indexing the driveshaft with regards to the companion flange on the diff. there are six positions in which it can mate to the companion flange.
shitty tires will still balance, and a bent wheel will balance if you add enough weight. but it will still vibe because its bent...
as always, check your wheel bearings.
as far as two tone roush's problem goes, i'd say the poly diff bushings most likely have the pinion at the wrong angle. it should be parallel to the engine's angle. you could also try re-indexing the driveshaft with regards to the companion flange on the diff. there are six positions in which it can mate to the companion flange.
Funny upgrading my 01 to 04 stuff. Just put my T56 in with the 03/04 cobra driveshaft (brand new). Got the same damn vibe.
IRS differential Mounts, Aluminum, pinion angle adjustable
IRS differential Mounts, Aluminum, pinion angle adjustable
[click for larger image]
$249.95
Part #: MMIRSB-40
Manufacturer: Maximum Motorsports
Aluminum Differential Bushing Kit features:
* The MM Aluminum Differential Bushing Kit replaces all three stock rubber bushing sets.
* The MM Aluminum bushings allow the pinion angle to be raised by over 4 degrees. This means that the pinion angle can be adjusted to minimize driveline vibrations.
Would this solve it?
Mine was solved with powertrain-drivetrain mount neutralizing. It all depends on what you got.
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