i just put my new aluminum driveshaft in and it has some vibration between 58 to about 70 mph.now,would i be better off to buy a adj upper control arm and reset the pinion angle or should i try rotating the driveshaft and bolt it up through the differant bolt holes on the rear cobra style flange?its also got the roush springs front and rear.

 

I'd try rotating it first, AND buy an adjustable upper third link

 

I ran into the same thing. Rotating it helped, but I ended up putting a large hose clamp around one end. That killed the vibration.

 

Which driveshaft did you put on your car?

 

How did you determine where to put the clamp? Trial and error? You put it at the Tranny end or Rear axle end?

 

Lots of missing info...

What year/model Mustang do you have?

Manufacturer of driveshaft?

Adapter or replacement flange?

Did you mark the position of the factory shaft to flange prior to removal (both ends)?

Any dents or dings on the shaft?

If adapter, how did you install it?

 

its a 06 automatic gt,replacement cobra flange,yes i marked it,no dents,and its is the spyder shaft. now dont start flameing the driveshaft because it wasnt the problem!! i had to rotate the stock shaft also after i put the 3.73 gears in the rear.after rotating the spyder shaft to day its working as good or better as the stock shaft. no problems hitting any where or rubbing under the car either. VERY pleased with the shaft,well built and highly reccomend it!i think i will get a adj upper control arm and see if i can fine tune it since i know the pinion angle not like stock before i lowered the car.havent tried the clamps yet but i know they do work.

 

I also have an auto and installed the Spydershaft about a month ago. I did have a problem getting the new pinion flange seated correctly but you should NOT have to rotate ANY driveshaft to remove a vibration if it has been balanced correctly. Is your car lowered???? Send a PM to Ron Lenord @ Lenord Racing and tell him everything you have done to you car and what your issues are. He will help you.. Mine is as smooth as silk up to 100MPH!!
Scott

 

+1 to that Scott.

Might I add.. also needs to be installed correctly.

 

after 40 or so years of playing with cars i learned alot of things that are suppose to work dont ,alot of things that arent suppose to work do,and alot of trial and error is involved also.maybe you shouldnt have to rotate the shaft but it fixed my problem.i dont know if adjusting the pinion angle will improve it or not but i want know if i dont try.

 

Adding weights and or clamps to balance the drive shaft doesn't sound like a good idea. I have the Spydershaft and have had zero issues from the get go.

 

I agree you should be able to bolt it right up with no issues, provided the new shaft is balanced perfectly. Apparently mine isn't and it was easier to add a clamp then to send it back for re-balancing. The procedure with the hose clamp is right out of the Ford shop manual. Put it on near the differential end and experiment with clocking. Band-aid solution I know, but it works.

 

Just a word of caution. Using a metal hose clamp on an aluminum tube could start a chemical reaction that might compromise the integrity of the tubing.
Robert

 

I also agree with what Robert is saying. And to expand on this....you have no idea where to put this hose clamp. Do the smart thing and contact Ron @ Lenord Racing. If it is an issue with the DS he will fix it. Don't be stupid!!!!
Scott