Those of you with vibration, are you all lowered? I'm considering this for my next mod, but I do NOT want to deal with excessive vibration. A wake up strip upon decelerating is a deal breaker to the extreme for me.

 

Well it is not that loud but that is what I would describe it. That is how it feels to me anyways. I don't even think that there is an problem with the shaft the car probably dose that anyways but the stock shaft with all its rubber components masks it. I am going to rotate it 180 deg. and see if it helps. I also have an adjustable UCA coming in so I can set the pinion to exactly -2 deg. If that dose not cure it I might put the stocker back on.

I also have no suspension mods as of now.

 

Are you lowered? What suspension mods do you have?

 

I am not lowered. I have read that with a one piece driveshaft an adjustable UCA is recommended to set the pinion angle or one might get vibrations at various speeds. So that is my next step and than LCA.

 

My car is lowered 1.5" and I have no vibrations. I made my own UCA and LCA's with road ends. My driveshaft angle is -1.0 degrees.

 

I recently lowered my car using the Roush rear springs - something around 3/4" drop in the rear. Haven't had any problems with my Shaftmasters. Still runs quiet and smooth as ever. I've had it up to 90 on the highway, and will be at the track this weekend so expect to get over 100.

 

WOW...no suspension mods and you're having vibration issues?

Does it feel like you've got a 12" woofer in the back seat just buzzing? Reverberation you can feel through all parts of the car? 80+ mph?

 

Yes that would be a better way to describe it.

 

We have spent some time in the shop trying to reproduce the "wake-up strip" effect that is described in this thread.

We have found that this effect can be reproduced by either loose rear flange mounting bolts or a loose pinion flange.

We do realize that some of the mounting bolts we supplied may have had "excessive" thread locker on them. Excessive thread locker could lead to "false" torque readings and "loose" mounting bolts. Having a gear ratio change could lead to a loose pinion flange if not done properly.

If anyone who is experiencing this effect would like a new set of mounting bolts with liquid "loctite" , we will gladly send them to you. Please contact us at 1-866-912-2004 or
1-313-383-6347 or email david@shaftmasters.com with your name and address and we will get them out to you.

 

Well once it stops raining here in NH I am going to re-torque the bolts. How can I check if I have a loose pinion flange and what would need to be done to fix it?