09blkgtcal

Hey guys need some help, just installed eibach pro-kit, dspecs and spohn ajdustable panhard rod. The car drives fine no wheel shimy but there is a tire whine or hum. Anyone have any idea what it could be?

Sleeper_08

Did you check your pinion angle after lowering?

Does your panhard rod have rod ends or poly bushings?

09blkgtcal

can you be more specific about the pinion angle and the panhard rod has a rod end on one side and a poly on the other

09blkgtcal

I forgot to mention that I didnt get an alignment idk if that could be causing it. The noise is coming from the rear

Sleeper_08

Here is a link to an article that talks about checking the pinion angle

http://www.cherod.com/mustang/HowTo/LCA%20_adj.htm

Angles outside of spec result in more noise.

Your Panhard bar was installed with the rod end on the axle and the poly end on the frame - correct?

As the poly/rod panhard rod now transmits more noise than the rubber bushings in the stock one then what you are hearing is probably more gear/tire noise from the rear axle.

09blkgtcal

alright im gona try to figure out whats wrong. Thanks for the help Ill post the results soon

Sam Strano

Get an alignment, the change in camber and toe can cause tire noise. Saw this last week on an Audi A4. The tires are very noisy directly after lowering, before the alignment.

07 GT E UPP

I doubt very much if it's an incorrect pinion angle causing your hum and whine. My experience is that this was more of a shake or vibration. Sounds like it's NVH through your new adjustable panhard bar because of those wheel alignment areas that Sam previously mentioned. Hold on now, because Noises (NVH) get even worse with an Adjustable upper control arm.. etc..