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HD Semi-Solid Gearbox Mount Set (G50). Porsche 911 1987-89 G50 ❭ 91137503110
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- Porsche 911 1987-1989 3.2L G50
Improve drivetrain precision and shifting response with the HD Semi-Solid Gearbox Mount Set, designed for Porsche 911 models equipped with the G50 transmission (1987–1989).
This high-durometer semi-solid mount set replaces worn factory rubber bushings to deliver tighter drivetrain control, reduced movement, and improved alignment without introducing harsh vibration.
By minimizing gearbox motion under load, it enhances shift feel, stability, and feedback, creating a more connected and confident driving experience.
Sold As A Set Of 2 bushes (4 halves).
Fits:
- Porsche 911 1987-1989 3.2L G50
Fits On To Diagram Ref No 1
What This Product Does:
- The HD version is made from rubber with roughly 25 % higher durometer (i.e. stiffer) than original rubber mounts.
- It fits into the stock mounting brackets / spacers (i.e. “installs in stock transmission mount hangers replacing worn factory rubber”)
- Because it is semi-solid rather than full solid, it retains some vibration isolation while cutting down drivetrain slop.
Symptoms Of Worn Or Soft Gearbox Mounts:
- Thuds, clicks, or knocking noises from the drivetrain, especially under shifting or torque load
- Excessive vibration felt in the cabin or floorboard
- Drivetrain “slop” or delayed response when you apply or remove throttle
- Shifts may feel less crisp due to slight misalignment or movement
- Additional stress on driveshafts, couplings, or mount brackets
- Transmission housing might appear to move or twist during load changes
Why Upgrading Matters:
- Improved Shift Feel & Response — with less drivetrain flex, shifts feel more direct
- Better Drivetrain Alignment Under Load — geometry stays more consistent under torque
- Reduced Clunk / Play — eliminates slack or movement that can degrade feedback
- Durability — stiffer rubber lasts longer, resists deformation, aging, and oil exposure
- Balanced NVH — better than stock in performance use, but not as harsh as full solid mounts
- Plug-and-Play Fitment — designed to use original mount brackets and spaces
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91137503110
The product you are viewing cross references to these numbers
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