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Digging this thread up. Recently put my second car back on the road, 2010 STi. It had quite a wobble at 97kmh but would mostly go away if you went faster. The oem wheels were old/curbed etc, tires were 10+ years old and they leaked. So I got new wheels and tires for it. Threw them on the other day but the vibration is still there. Less sure, and it’s moved up to about 105kmh. Let’s assume the wheels are correctly balanced.
Could a poor alignment cause a steering shimmy? [The alignment in my RS has always been shit but has not caused any poor driving characteristics, no vibes]. An alignment for the STi is not much money but I wouldn’t have it done until I replace the stock tophats that I can see some cracks in.
**edit**
Looking in the history I see some related bits. Probably more detail but I wrote down the abridged versions. previous owner kept every receipt, all dealer serviced so a while ago I made an abridged version on my phone. Some related stuff
- recently new motor/trans/shifter mounts and bushings. New wheels and tires
- 05/29/2020 winter swap, alignment,
- 07/18/2019 - oil change, LR wheel bearing/hub, front control bushings, sway bar endlinks/bushings
- 11/15/2018 - oil change, injector cleaner, oil additive, alignment, battery
- 03/08/2018 - ABDF oil change, oil additive fuel treatment, spark plugs, diff oil, lsd diff oil, “tune up kit”, alignment
- 01/23/2017 - RR wheel bearing/hub assembly
** edit 2**
I have no idea if this is normal. My STi has incredibly light steering. Single finger all the time and I don’t like it. It’s also extremely responsive steering with a quick rack ratio, so it feels like if I sneeze I could dart across four lanes of traffic. Even removing one hand to shift is enough to make the car wiggle within the lane. Is that normal for an STi? Or a big red flag?
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