Subaru WRX and STI (GE/GH/GR/GV, 2008-2014): Drivetrain mods
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What are the best drivetrain mods for the Subaru WRX and STI (GE/GH/GR/GV, 2008-2014)?
It depends on the car’s condition and how you use it. These are the 1 drivetrain build entry we have sourced for this car: Rebuild a crunching 5-speed with a new 3rd-gear synchro (Limited). Each lists caveats, related problems and sources so you can match it to your goal.
Rebuild a crunching 5-speed with a new 3rd-gear synchro Limited
A 2008-14 WRX 5-speed that crunches into 3rd needs a new synchro; Subaru's MY08+ part is a 3-piece double-cone design, with different part numbers for very early MY08 cars per one retailer.
Caveats: Single retailer source. The STI's 6-speed is a different gearbox.
Related issues: 5-speed crunches or grinds into 3rd as the synchro wears
Parts: Genuine 2008-14 WRX 5-speed 3rd-gear synchronizer (double-cone)
Sources (1)
- Subaru Genuine 3rd Synchronizer 5MT MY08+ — Rallispec (Subaru parts retailer) (vendor article; read 2026-10-26; full page read)
More for this car
- All Subaru WRX and STI (GE/GH/GR/GV, 2008-2014) fitment answers · GE/GH/GR/GV common problems
- Newsletter archive: past issues with every new and corrected entry
Report a correction — spotted an error or have a better source? Email hello@chassisdex.com.