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Porsche > Cayman 718C (982C) 2017>> > Cayman GTS 718 4.0L Manual (400 Bhp) > Gearbox / Transmission > Gearbox Mounts >

Gearbox Mount Bushings Set (G50). Porsche 911 87-89 G50
Gearbox Mount Bushings Set (G50). Porsche 911 87-89 G50 - 91137503110
Gearbox Mount Bushings Set (G50). Porsche 911 87-89 G50 - 91137503110, 91137503109 - PR13009P
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91137503110/5
Product Information
Product Information
Gearbox Mount Bushings Set (G50).
Gearbox Mount Bushings Set for Porsche 911 G50 (1987–1989). This rubber mount set restores gearbox stability, reduces vibration, and maintains proper drivetrain alignment under load.
Sold As A Set Of 4.
x2 Sets Required Per Car.

Fits:
  • Porsche 911 1987-1989 3.2L G50

Fits On To Diagram Ref No 1

What This Product Does:

  • Support & locate the gearbox - The mounts hold the transmission housing securely to the chassis or subframe, maintaining alignment between the gearbox and the driveshafts.
  • Dampen vibration & isolate noise - The rubber or elastomer in the bushings absorbs vibration from the transmission and drivetrain, preventing harshness from transferring into the cabin.
  • Limit movement under torque - Under acceleration, deceleration, or shifting loads, the gearbox wants to twist or shift slightly. The mount bushings resist that motion, constraining it to acceptable levels.
  • Maintain geometry & protect components - A stable mount ensures the angular relationships and alignment of the drivetrain (driveshafts, couplings, mounts) remain correct under load.

Symptoms / Signs Of Worn Or Failed Mounts:
  • Clunking, thuds or knocks from the gearbox area when shifting or under throttle
  • Increased drivetrain vibration felt in the cabin
  • Loose or laggy gear shifts, or slight misalignment registering as “play”
  • Excess movement / twist of the gearbox under load
  • Stress or wear on driveshafts, universal joints, or coupling components
  • Noise under load changes — e.g. when engaging or releasing throttle

Why Replacement Matters:
  • Restores drivetrain stability and response — tighter mounts reduce slack that dulls shift feel and throttle response
  • Protects other drivetrain parts — controlling movement reduces undue stress on joints, couplings, and shafts
  • Maintains alignment & lug angles — consistent mounts help preserve correct geometry even under load
  • Eliminates noise & vibration due to degraded bushings
  • Ensures proper operation — a failing mount can cause accelerated wear or even damage
  • Maintains value & reliability — restoring mount integrity is important for longevity, performance restoration, and driver satisfaction



Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

91137503110
91137503110
91137503109

The product you are viewing cross references to these numbers
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Bolt for engine/gearbox mount support bracket. Porsche Boxster / Cayman - 90037824901
5
Bolt for engine/gearbox mount support bracket. Porsche Boxster / Cayman
Special Order item
90037824901
Product Information
Product Information
Bolt for engine/gearbox mount support bracket. AM 10 x 55.

Fits:
Cars  with 6-speed manual transmission
Porsche 981 Boxster 2012 - 2016 
Porsche 981SP Boxster Spyder 2016
Porsche 982 Boxster 2017>>
Porsche 982SP Boxster Spyder 2019>>
Porsche 981C Cayman 2013 - 2016
Porsche 981C Cayman GT4 2016
Porsche 982C Cayman 2017>>
Porsche 982C Cayman GT4 2019>>

Diagram ref no 6 (engine) or 2 (gearbox).

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

90037824901
90037824901

The product you are viewing cross references to these numbers