Quote:
Originally Posted by Apex_BRZ
Rattling/Creaking Rear Deck
Buzzing Passenger Side Door/Window Switch
Rattling Throwout Bearing
Drivetrain Slop/Clunk Every Time Going From Rev/For
DI Fuel Pump Chirping
Rattling Shifter Reverse Lockout at Mid/High RPM
Notchy Shifer In Cold Weather (2nd gear unusable until it warms up)
Rattling Door Speaker (could be same issue as Buzzing door/switch)
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Let's be systematic about this:
Rattling/Creaking Rear Deck
Buzzing Passenger Side Door/Window Switch
Rattling Door Speaker (could be same issue as Buzzing door/switch)
The above will take some time, for the door speaker and passenger door switch the door should be removed and sound deadened, also you can try marine rtv adhesive silicone when you attached things so they actually stay together this should be done to both doors the sound difference will be noticeable
DI Fuel Pump Chirping - Seriously?!?

this is not a fixable issue, unless you'd like to replace it the same noise will appear unless you say try adding 2 stroke oil to the gas, or finding ethanol free fuel, also some people found the chirping doesn't appear with an oil cooler The below issues could possibly be fixed all at once at a shop that does transmission work:
Rattling Throwout Bearing
Drivetrain Slop/Clunk Every Time Going From Rev/For
Rattling Shifter Reverse Lockout at Mid/High RPM
If the sound goes away when you push the clutch pedal, it is your clutch.
If the sound happens when you push the pedal, it is your throwout bearing.Throw out bearing noise is relatively common on these cars at one point peoples flywheel bolts just needed to be torqued down
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Notchy Shifer In Cold Weather (2nd gear unusable until it warms up)
This one can easily be fixed with a fluid swap, getting something like motul or pentosin will get rid of the notchiness