Experiment: 2006 9-5 Steering Wheel Vibration reduced - Saab 9-5 Bulletin Board - Saabnet.com
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Experiment: 2006 9-5 Steering Wheel Vibration reduced
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Posted by Mark in Marine [Email] (#1837) [Profile/Gallery] (more from Mark in Marine) on Sat, 4 Jul 2020 14:12:39 Share Post by Email
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One of my daughters is moving to continue her schooling, and I am prepping her 9-5 wagon for a new life on its own without me as her COD (Call on Dad) mechanic. I am finally checking a few things that she's been too busy for me to work on until now.

One of those is steering wheel vibration when in drive with foot on the brake (Automatic Transmission).

On another SAAB board in a thread on steering wheel vibration, one person posted a single sentence: "jack up your engine". This got me to thinking - always dangerous! I had a vibration in my BMW after replacing a driveshaft and motor mounts, and the manual said that you might need to "align the drive train" - maybe our 9-5's are similar ?

Here was my EXPERIMENT with the front of the 9-5 on jack stands:

1) I removed the Nuts (only) from the RH side and Rear engine mounts.
2) I removed the battery and battery tray, and I moved the relay box out of the way so I could get to the transmission mount nut.
3) I supported the transmission with wood block over floor jack to remove the transmission mount nut and make certain the stud was exactly centered in its hole, then I torqued to spec.
4) I reinstalled the relay box, tray, and battery
5) I moved the jack and wood block over to the oil pan and lifted until the RH mount collar was free to turn, then I started the car.
6) With the engine idling in Park, I slowly lowered the engine onto its mounts.
7) I sat in the car and with the brake on I shifted from P to R to N to D, pausing for 3 to 5 seconds in each gear, and I repeated three times.
8) I turned the car off, I reinstalled the RH side and Rear mount nuts, and I torqued to spec

I cannot say that there is NO vibration in D with AC running and foot on the brake, BUT this car is now smoother than at any time since I bought it over five years ago. I replaced all four engine / transmission mounts and the subframe bushings when I acquired the car. Those have about 50K miles on them at this time - not totally worn out yet.

Without a 'vibration meter', my perception of reduced vibration could be all in my head. The real test will be when my daughter drives the car home tonight - if she notices and comments, I will consider this a success. I'll post back with that result.

Mark in Marine



->Posting last edited on Sun, 5 Jul 2020 12:47:18.
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