Bad Tranny mount=Tug when Drive and Reverse is first Engaged??? - The Saab Link Forums

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Performance Modifications for the NG900 / Old 9-3 This forum contains PERFORMANCE related Q&A's for the NG900 and 9-3. This may also include suspension.

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Old 06-20-2009, 03:19 AM   #1
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Question Bad Tranny mount=Tug when Drive and Reverse is first Engaged???

I just got a brand new TRANNY mount installed tonight along with two new axles. When I am in park, put the car into reverse, it has a tug (no sound, just a tug/engine moves). Then when I engage into drive, once again another tug. Best described as the car feels like it lifts up when I engage into either reverse or drive.

Mechanic I had the car in said no other mounts needed to be replaced. Do Saabs have this "tug" when put into reverse and then into drive? Once the car is driving, there is some vibration, but not bad...just feel the vibration (subtle) on the underneath part of the steering wheel and my ass sometimes, but not when I grip the wheel on the top part.


Last question is if I should be replacing the other mounts in spite the mechanic said they looked fine AND, if I should upgrade my mounts to the nice ones sold off Nick's site?


I have an auto gearbox if it helps.
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Old 06-20-2009, 05:40 AM   #2
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first i would start simple and make sure the wheels are tight since its a hub centering wheel. the mounts are obvious when they are bad, jack it up and just test with a prybar. you would think since the mechanic replaced one he would have looked at them all.
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Old 06-20-2009, 05:49 AM   #3
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well, the torque converter is going to load up, and try moving the car.
are you doing this with your foot on the brake, or with the E-brake on?

cars ALWAYS lift when they roll back on the ebrake.

in either case... it's pretty normal.
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Old 07-30-2009, 03:21 AM   #4
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Well,

The tugging is gone, but the vibration experienced from overall driving is still there. I know my tires are crappy branded tires so that may have something to do with the vibration, though a mechanic today said the engine was vibrating at idle and when driving. I can feel the vibration the most at lower speeds. At higher speeds, it becomes really negligable. Speeds where it is at its worst is basically in the 25-35mph or so range.

What I will do is I will place the car into neutral in various speed ranges and on various pavement/roads to basically have no pressure on the engine/release the load, and the vibration is still very prevelant with not much of any sign of difference.

And the mechanic did say the motor mounts are ok, though I want to have the car in at the place I was in today to see if he is able to locate any issues with the motor mounts.
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Old 08-04-2009, 05:23 PM   #5
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Sounds like you havea bad motor mount.Check the one on the right side.When the mount breaks the bolt in the center rubs on the mount housing causing the vibration.It is a bit of a pain to change but not that bad.Also check the rear mount as well.Hope this helps
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Old 08-05-2009, 06:18 AM   #6
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Quote:
Originally Posted by sturbo View Post
Sounds like you havea bad motor mount.Check the one on the right side.When the mount breaks the bolt in the center rubs on the mount housing causing the vibration.It is a bit of a pain to change but not that bad.Also check the rear mount as well.Hope this helps
Thanks. I haven't had a chance to get to the mounts yet, but this has to be what it is. I just did install the tranny mount which eliminated a lot of vibration, but I'm almost skeptical about whether that mount broke already, if that's even possible.

I'll go and put the car on the rack today sometime.

Thanks!
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