2005 Mustang GT... Drivetrain vibration being caused by pinion angle? - Ford Mustang Forum
 
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post #1 of 5 (permalink) Old 10-23-2007 Thread Starter
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2005 Mustang GT... Drivetrain vibration being caused by pinion angle?

I lowered my 05 with BMR lowering springs which is 1.75 in the rear to level the car. I now have a buzzing type vibration starting at about 80mph on the highway. Up to there it is dead smooth. Has anyone else experienced this vibration at high speed? I was wondering if it could be a bad pinion angle on the driveshaft? I have never felt this so I dont know what it would feel like. Is it sever or subtle? It also shows up in the rear view as it starts to vibrate at the same speed. It also starts to go away at about 95 or so. I have 4.10s and was wondering if this could contribute to the problem? Tires and wheels rebalanced so I dont think it is those.

I also had a bunch of clunks and noise after I lowered the car and put d-specs, along with steeda HD strut plates on the front. My problem was the sway bar end links. I tried an impact gun but the stud would spin along with the nut and I never got a good torque. After I used a wrench on the stud, which the end is squared for this purpose, and another wrench on the nut, I was able to get enough torque to really tighten the nut. No more noise from the front end. Thanks GA


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post #2 of 5 (permalink) Old 10-23-2007
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Are you running the stock driveshaft?


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post #3 of 5 (permalink) Old 10-26-2007 Thread Starter
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Bad Pinion Angle

Yes I am still using the stock drivshaft.

05GT, 09 GT500 Drivetrain, 2.6 pulley, JLT intake, 18x9.5 GT500 wheels, 14" Brembos, 2014 rear brakes, 14 cooling fan, Cortex racing Koni Coilovers, Cortex Watts Link BMR:K-Member, Tube rad support, adj upper third link, rear relo brackets,JBA long tubes and catted mid pipe, Stillen adj front & rear sway bars, Bump steer kit, Steeda shifter, Spydershaft Aluminum DS.
John Lund tune, 568 rwhp, 560 tq.
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post #4 of 5 (permalink) Old 10-26-2007
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Is it a vibration you can feel or just hear?

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post #5 of 5 (permalink) Old 10-26-2007
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Quote:
I have 4.10s and was wondering if this could contribute to the problem? Tires and wheels rebalanced so I dont think it is those.
I would lean more twords the gears then the pinion angle with the stock DS. The stock DS has a C/V style joint which allows for a greater angle without vibs.


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Last edited by stlwagon; 10-26-2007 at 06:56 PM.
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