Ford performance driveshaft vibration at 130mph

[Mike_FL]

Recently had a one piece ford performance driveshaft installed and my first Impressions were great.

However when on track driving at higher speeds it vibrates. Starts around 120mph and by 130-140 it’s really bad. My car has the cortex torque arm so there’s no adjustment on the pinion angle.

Has anyone else had this issue. Is it worth taking it off and getting it rebalanced?
I’ve heard great reviews with the QA1 carbon shaft but that’s nearly $2k and if it still vibrates I’ll be pissed.
Would prefer not to put the oem two piece shaft back on as it clunks really badly. Can anything be replaced within the oem shaft to make it smoother?
Thanks

 

[nyuk98GT]

Recently had a one piece ford performance driveshaft installed and my first Impressions were great.

However when on track driving at higher speeds it vibrates. Starts around 120mph and by 130-140 it’s really bad. My car has the cortex torque arm so there’s no adjustment on the pinion angle.

Has anyone else had this issue. Is it worth taking it off and getting it rebalanced?
I’ve heard great reviews with the QA1 carbon shaft but that’s nearly $2k and if it still vibrates I’ll be pissed.
Would prefer not to put the oem two piece shaft back on as it clunks really badly. Can anything be replaced within the oem shaft to make it smoother?
Thanks

Mike_FL,

Not sure if this will help but there is a company making replacement bushings for the intermediate support. I have not had need of this (yet) but Mustang owners have reported great results with the new bushing parts. Here's the link: https://www.jxbperformance.com/prod...eshaft-center-support-bearing-carrier-upgrade

HTH,

Chris

 

[blacksheep-1]

Recently had a one piece ford performance driveshaft installed and my first Impressions were great.

However when on track driving at higher speeds it vibrates. Starts around 120mph and by 130-140 it’s really bad. My car has the cortex torque arm so there’s no adjustment on the pinion angle.

Has anyone else had this issue. Is it worth taking it off and getting it rebalanced?
I’ve heard great reviews with the QA1 carbon shaft but that’s nearly $2k and if it still vibrates I’ll be pissed.
Would prefer not to put the oem two piece shaft back on as it clunks really badly. Can anything be replaced within the oem shaft to make it smoother?
Thanks

IMO stay away from the carbon shafts. They are not used in production car racing to any great degree. They have lots of issues due to chips and misc road hazard damage.

The fast and dirty thing to do is to
" clock" the driveshaft 180 degrees and try it again. At that point, if it still exists, is to get it balanced.

 

[Mike_FL]

Thanks, think I’m going to remove it and get it rebalanced. Do you have anywhere that you could recommend in Florida?
Im not going to know if it’s fixed unless I go back to Sebring.
Don’t think Florida state troopers will appreciate me testing at 130mph on the i4 lol

 

[Vettel-ish]

I already have a thread on this from my old car. See if you can find that.

I can tell you that mine we think was due to the tourqe tube. This not allowing for perfect degrees from the engine to trans to diff. ONLY felt in the car over 140+

 

[blacksheep-1]

Driveshaft custom built, repair and balancing shop in Stuart, Florida

We specialize in custom built, balancing and repair of aluminum and steel driveshafts.

www.drivetraincenter.info

 

[Mike_FL]

Driveshaft custom built, repair and balancing shop in Stuart, Florida

We specialize in custom built, balancing and repair of aluminum and steel driveshafts.

www.drivetraincenter.info

Thanks I’ll check them out. Someone also recommended precision shaft technology over in Clearwater

Precision Shaft Technologies - The Leader in Performance Driveshafts

PST manufactures the strongest, fastest, and most dependable high-performance custom driveshafts in the world. Trusted by top racers around the world.

pstds.com

 

[Mike_FL]

I already have a thread on this from my old car. See if you can find that.

I can tell you that mine we think was due to the tourqe tube. This not allowing for perfect degrees from the engine to trans to diff. ONLY felt in the car over 140+

Found the thread.

Whole car vibration @ 135+mph HELP!

Let me give you a bit of back story. Really looking for some help on what do here. Long post warning!Bought this car a year ago now. Did over 1300 miles with her on track this year and could not be more happy with the cars performance. You can read the mods I have in my build thread but quick...

trackmustangsonline.com

My ford performance driveshaft is great on the street and at smaller tracks with a lower top speed. I’m guessing it’s only balanced to a certain speed/revolutions thinking that they won’t be exceeded by most people??

 

[Swiss Boss]

I had no issue with my QA1 driveshaft with speed above 150MPH at VIR.

To me the greatest advantage to a carbon drive shaft beside the weight saving is, if it decide to fail, it won't poke a hole trough the floor or bite the ground and send you flying. It will just disintegrate into millions of pieces.

I currently have it on sale because I'm switching to a different trans otherwise I'll still run it.

PM me if you want more info