Gearbox Mounts

OE Match hydraulic gearbox mounts supplied as a SET OF 2 for Porsche 981 Boxster, 981C Cayman and Cayman GT4 applications. These non-dynamic mounts are intended for vehicles without Dynamic engine mount (PADM).

Fits

for cars WITHOUT Dynamic engine mount (PADM)

• Porsche 981 Boxster 2012-16
  Boxster 981 2.7L 2012–16
  Boxster 981 S / GTS 3.4L 2012–16
• Porsche 981C Cayman 2014-16
  Cayman 2.7L 981 2013–16
  Cayman S / GTS 3.4L 981 2013–16
• Porsche 981 Cayman GT4 2016
  Cayman GT4 3.8L 2015–16

Check fitment for your specific vehicle (model, year, engine) before ordering. Confirm the mounting specification as well as the vehicle details: this set is not the dynamic PADM version.

Boxster / Boxster S and Cayman / Cayman S — Diagram: 306-000, item 7.
Cayman GT4 — Diagram: 306-000, item 4.

What This Product Does

The mounts connect the transmission assembly to its supporting structure, carrying the gearbox while cushioning vibration and accommodating drivetrain loads. Their hydraulic construction provides damping without the active adjustment associated with dynamic mounts.

Functions

• Support the gearbox at its mounting points.
• Limit unwanted transmission movement under load.
• Isolate drivetrain vibration from the body.
• Help maintain the position of the transmission assembly.

Technical Details

• Supplied quantity: two hydraulic gearbox mounts.
• Mount reference: 98137504902.
• Specification: non-dynamic, without PADM.
• Internal diagram application notation: PR:-140.
• Diagram quantity: two mounts in each listed assembly.

Symptoms of Fault

• Knocking or a thump as drive is taken up.
• Noticeably greater vibration inside the vehicle.
• Excessive movement of the transmission assembly.
• Less consistent gearshift feel.
• Split rubber, a sagging mount or visible hydraulic leakage.

These observations are inspection prompts rather than proof of mount failure. Clutch, linkage and internal gearbox faults can produce overlapping symptoms.

Why Replacement Matters

Deteriorated mounts can allow the gearbox to move beyond its intended position, transferring vibration and placing additional strain on nearby connections. Renewing a worn pair addresses both transmission support points together. Inspect the brackets, fasteners and other drivetrain mounts during the repair; additional installation hardware is not confirmed as part of this set.

FAQs

Is this set suitable for dynamic PADM mounts?
No. The supplied application specifies vehicles without Dynamic engine mount (PADM).

Will replacement mounts resolve gear crunching?
Not necessarily. Clutch operation and gearbox internals require separate diagnosis; mounts should be checked for excessive movement and deterioration.

Are fitting bolts included?
Only the two hydraulic mounts are confirmed. Establish which fasteners are required before beginning installation.

Set of two Kits hydraulic gearbox mounts for Porsche 981 Boxster, 981C Cayman and Cayman GT4 models without Porsche Active Drivetrain Mounts (PADM). These non-dynamic mounts support the transmission while helping isolate normal drivetrain movement and vibration.

Fits

For cars WITHOUT Dynamic engine mount (PADM)

• Porsche 981 Boxster 2012-16
• Porsche 981C Cayman 2014-16
• Porsche 981 Cayman GT4 2016
• Boxster 981 2.7L 2012–16
• Boxster 981 S / GTS 3.4L 2012–16
• Cayman 2.7L 981 2013–16
• Cayman S / GTS 3.4L 981 2013–16
• Cayman GT4 3.8L 2015–16

Check fitment for your specific vehicle (model, year, engine) before ordering.

Diagram: 306-000, item 7 for 981 Boxster and 981C Cayman; item 4 for 981C Cayman GT4.

What This Product Does

The hydraulic mounts connect the gearbox assembly to the vehicle structure, supporting its position and damping vibration transferred through the drivetrain. Their controlled movement also helps maintain the intended alignment of the transmission, linkage and surrounding components during acceleration, braking and gear changes.

Functions

• Supports the gearbox in its installed position
• Damps vibration transmitted from the drivetrain
• Controls transmission movement under changing loads
• Helps maintain gearbox and linkage alignment
• Reduces stress caused by excessive drivetrain movement

Technical Details

• Part number: 98137504902
• Contents: two hydraulic gearbox mounts
• Mount type: non-dynamic hydraulic mounting
• Application code: PR:-140
• For vehicles without option code 140, Porsche Active Drivetrain Mounts (PADM)
• Diagram group: transmission suspension and threaded joint

Symptoms of Fault

• Increased vibration through the cabin at idle or low speed
• Thumps or clunks when engaging gear or changing throttle load
• Noticeable drivetrain movement or shunt
• Less precise or inconsistent gear-change feel
• Exhaust or nearby components knocking as the drivetrain moves
• Visible mount deterioration, collapse or hydraulic leakage

Why Replacement Matters

Age, heat cycling and repeated drivetrain loads can reduce a hydraulic mount's ability to control gearbox movement. Replacing worn mounts as a matching pair helps provide balanced support, restores the intended isolation between the transmission and body, and limits avoidable strain on the linkage, exhaust connections and related components. Other potential causes of vibration or poor shifting should be checked before replacement.

FAQs

• Are these mounts suitable for cars with PADM?
  No. This set is specified for vehicles without Dynamic engine mounts (PADM), identified by application code PR:-140.
• Does the set contain both required mounts?
  Yes. The supplied diagram data specifies a vehicle quantity of two, and this package contains two mounts.
• Will replacing the mounts repair gearbox crunching?
  Not necessarily. Worn mounts can affect drivetrain movement and shift feel, but crunching may also indicate clutch, linkage or internal transmission wear.
• Should related hardware be inspected?
  Yes. Check the mounting consoles, sleeves, nuts and bolts during installation and renew any items that are damaged or specified as one-time-use.