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Porsche 914 (1970-1976) Gearbox / Transmission

Gearbox Mounts

Gearbox Mounts

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DISPLAYING 1 to 5 (of 5 products)
Gearbox mount. Porsche 914 - 91437502500
2
Gearbox mount. Porsche 914
Special Order item
91437502500
Product Information
Product Information
Gearbox mount.

Fits:
Porsche 914-4 1970 - 1976

Click 'Zoom in' for large parts diagram.
Diagram ref no 36

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Related, superseded, cross reference or alternative numbers for comparison.

91437502500
91437502500

The product you are viewing cross references to these numbers
Gearbox mount. Porsche 914 - 91437502500 - 911130-01, URO-004221, 1632400200
3
Gearbox mount. Porsche 914
91437502500/1
Product Information
Product Information
Gearbox Mount.

The OE Match Gearbox Mount is a replacement rubber transmission mounting for Porsche 914 four-cylinder models.

Fits:
  • Porsche 914-4 1970 - 1976

Diagram Ref No 36

Installed between the gearbox/transaxle and the vehicle structure, the mount supports the transmission while isolating normal drivetrain vibration and movement from the chassis.

The Porsche 914's engine and transaxle generate continuous vibration, torque reaction and movement as the vehicle accelerates, decelerates and changes gear. The gearbox mounts allow a controlled amount of movement while keeping the transmission correctly located.

Over time, the rubber within the original mounts can harden, crack, separate or collapse. When this happens, the gearbox can move more than intended, potentially causing increased vibration, knocking noises, less precise gear selection and additional stress on surrounding drivetrain components.

Replacing worn mounts helps restore correct gearbox support, drivetrain alignment and the smoother, more controlled behaviour intended by the original mounting system.

What This Product Does:
The Gearbox Mount supports and locates the Porsche 914 transaxle while isolating drivetrain vibration from the body.

Its main functions are to:

  • Support the gearbox/transaxle.
  • Maintain correct drivetrain position.
  • Control transmission movement during acceleration and deceleration.
  • Absorb normal drivetrain vibration.
  • Reduce vibration transmitted into the chassis.
  • Help maintain correct gear-selector geometry.
  • Reduce shock loading on surrounding drivetrain components.
  • Support smooth power delivery.
  • Replace cracked, hardened, collapsed or separated original mounts.

Symptoms Of Wear Or Failure:
Common symptoms can include:

  • Excessive drivetrain movement.
  • Gearbox visibly moving under load.
  • Clunk when accelerating.
  • Clunk when lifting off the throttle.
  • Increased vibration through the body.
  • Increased vibration at idle.
  • Harshness through the cabin.
  • Gear lever movement during acceleration or deceleration.
  • Less precise gear selection.
  • Knocking from the rear drivetrain area.
  • Rubber visibly cracked.
  • Rubber separating from the metal section.
  • Mount sagging or collapsing.
  • Oil-soaked or deteriorated rubber.
  • Transmission sitting incorrectly.

Why Replacement Matters:
Replacing worn Gearbox Mounts helps restore:

  • Correct transmission support.
  • Controlled drivetrain movement.
  • Improved drivetrain alignment.
  • Reduced vibration.
  • Reduced knocking and clunking.
  • More consistent shift-linkage geometry.
  • Smoother power delivery.
  • Reduced stress on surrounding components.



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

91437502500
91437502500

The product you are viewing cross references to these numbers
Gearbox mount. Porsche 914/6 - 91437502600
2
Gearbox mount. Porsche 914/6
Special Order item
91437502600
Product Information
Product Information
Gearbox mount.

Fits:
Porsche 914/6 1970 -72

Click 'Zoom in' for large parts diagram.
Diagram ref no 36

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

91437502600
91437502600

The product you are viewing cross references to these numbers
Gearbox mount. Porsche 914/6 - 91437502600 - URO-011646
3
Gearbox mount. Porsche 914/6
91437502600/1
Product Information
Product Information
Gearbox mount. Solid Rubber version.

Fits:
Porsche 914-6 1970-76

Click 'Zoom in' for large parts diagram.
Diagram ref no 36

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

91437502600
91437502600

The product you are viewing cross references to these numbers
Gearbox rubber mount washer, Lower. Porsche 914 / 914-6 1969-76 - 91437523700 - 1632450100
2
Gearbox rubber mount washer, Lower. Porsche 914 / 914-6 1969-76
91437523700/1
Product Information
Product Information

This OE Match lower washer is intended for the gearbox rubber mounting assembly on Porsche 914 and 914-6 models. It is made from galvanised steel.

Fits

Porsche 914 1969-76
Porsche 914-6 1969-76 SPM

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

What This Product Does

This component is the lower washer used with the transmission's rubber mounting arrangement. It is mounting hardware, rather than a replacement rubber mount or an internal gearbox component.

Technical Details

  • Part reference: 91437523700.
  • Location: lower position within the gearbox rubber mounting assembly.
  • Material and finish: galvanised steel.
  • Both supplied assembly diagrams specify two washers; this is the assembly requirement, not a stated pack quantity.

Symptoms of Fault

Clunking when taking up drive, unusual vibration or excessive drivetrain movement can warrant inspection of the transmission mounts and their fixings. These symptoms do not establish that the washer itself is faulty; the rubber mounts and surrounding hardware should also be checked.

Why Replacement Matters

During mount repairs or restoration, inspect the lower washers alongside the mounting bolts, brackets and rubber components. Replacing a washer should not be treated as a remedy for a deteriorated mount, worn linkage or internal transmission fault.

FAQs

Is this a complete gearbox mount?
No. This product is the lower steel washer used with the rubber mounting assembly.

Will replacing it resolve difficult gear selection?
Not necessarily. Mounts, linkage and clutch condition can all influence gear selection, so diagnosis should establish the cause before parts are replaced.

How many washers does the assembly use?
Each supplied diagram records a requirement of two for this part reference.



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

91437523700
91437523700

The product you are viewing cross references to these numbers
DISPLAYING 1 to 5 (of 5 products)
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About Gearbox Mounts

Porsche Gearbox Mounts | Stability, Precision & Reduced Drivetrain Vibration

Gearbox mounts (also known as transmission mounts) are essential components that secure your Porsche’s gearbox to the chassis while isolating vibration and absorbing torque movement. These mounts play a crucial role in maintaining drivetrain alignment, smooth shifting, and overall driving comfort.

At Design911, we supply high-quality gearbox mounts and transmission mounting kits engineered to meet or exceed original performance specifications. Constructed from advanced rubber, polyurethane, or hydraulic materials, each mount provides the perfect balance of flexibility and strength — ensuring your Porsche maintains stable, refined performance under both road and track conditions.

Whether you’re restoring a classic Porsche or maintaining a modern performance model, our gearbox mounts deliver long-lasting stability, improved handling, and reduced drivetrain noise and harshness.

What Do Gearbox Mounts Do?

Gearbox mounts act as the vital connection between your Porsche’s transmission system and chassis, absorbing torque and vibration while maintaining alignment under load.

Core Functions:

  • Secure the gearbox in place under acceleration, braking, and cornering.
  • Absorb vibration and noise from the drivetrain.
  • Maintain correct driveshaft and linkage alignment.
  • Prevent excess movement that can stress surrounding components.

Without properly functioning gearbox mounts, excessive drivetrain movement can lead to harsh shifting, vibration, and even damage to exhaust, linkage, or driveshaft components.

Why Do Gearbox Mounts Fail or Wear Out?

Over time, gearbox mounts degrade due to exposure to engine heat, torque stress, and environmental factors such as oil contamination or moisture.

Common Causes of Failure Include:

  • Rubber deterioration or cracking from heat and age.
  • Hydraulic fluid leakage in fluid-filled mounts.
  • Metal fatigue in high-performance or heavy-load use.
  • Oil contamination softening rubber compounds.
  • Continuous torque stress from aggressive acceleration.

As mounts weaken, you may experience clunking noises, drivetrain vibration, gear lever movement, or difficulty shifting — all signs that your gearbox mounts need replacement.

Why Replace or Upgrade Your Gearbox Mounts?

Replacing worn gearbox mounts restores drivetrain stability, smoother shifting, and reduced vibration. Upgrading to reinforced or performance mounts enhances control and torque response, especially on tuned or track-driven Porsches.

Key Benefits:

  • Restores smooth, vibration-free gear changes.
  • Prevents drivetrain movement and component stress.
  • Improves handling precision and throttle response.
  • Reduces noise, vibration, and harshness (NVH).
  • Available in rubber, polyurethane, and performance-spec designs.
  • Ideal for maintenance, upgrades, or complete gearbox servicing.

Replacing mounts in pairs ensures balanced performance and consistent driveline alignment.

Highlights

  • Premium Porsche gearbox and transmission mounts.
  • Engineered for strength, durability, and vibration reduction.
  • Direct-fit replacements for Porsche 911, Cayman, Boxster, and others.
  • Reinforced designs for performance or track applications.
  • Reduces stress on transmission and drivetrain components.
  • Essential for smooth shifting, refinement, and drivetrain longevity.       

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