Please wait… 
Please wait while we process your order,
do not press the back button… 
Design 911 Design 911 supply Porsche parts, Porsche spares and Porsche accessories, to both retail and to the trade. Our Porsche product and accessory range includes brakes, exhausts, tyres, wheels and Porsche panels and interiors. https://design91.uk/images/schemaLogo.png https://design91.uk/images/schemaLogo.png +443456003478 https://design91.uk Facebook Instagram

Gearbox mounts

Refine by Car Type
Filter by brand
DISPLAYING 1 to 7 (of 7 products)
Special Offer
PFR57-531
Product Information
Product Information
Powerflex Gearbox Front Mounting Bush Insert Kit.
Fits 996 & 997 vehicles with the twin mounting bracket (Replacement for Porsche parts number 99737503303) at the end of the gearbox.

Fits:
Porsche 996 / 997 all 3.6 & 3.8 Tiptronic models, Turbo models Manual & Tiptronic, GT2 & GT3.

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Related, superseded, cross reference or alternative numbers for comparison.

PFR57-531
99737503303
9963750303
99637533103
99637503302
99737503302
99737503301
99637503303

The product you are viewing cross references to these numbers
Special Offer
PFR57-531BLK
Product Information
Product Information
Powerflex Black Series Gearbox Front Mounting Bush Insert Kit.
Fits 996 & 997 vehicles with the twin mounting bracket (Replacement for Porsche parts number 99737503303) at the end of the gearbox.

Fits:
Porsche 996 / 997 all 3.6 & 3.8 Tiptronic models, Turbo models Manual & Tiptronic, GT2 & GT3

POWERFLEX Black Series bushes are manufactured using our Black 95 Shore A compound to provide maximum control of chassis geometry. 
They are designed for the Track, ready to Race and are engineered to be the best.



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Related, superseded, cross reference or alternative numbers for comparison.

PFR57-531BLK
99737503303
9963750303
99637533103
99637503302
99737503302
99737503301
99637503303

The product you are viewing cross references to these numbers
Special Offer
PFR57-530
Product Information
Product Information
Powerflex Gearbox Front Mounting Bush Insert Kit. For vehicles with a single gearbox bush in the end casing.
Replacement for Porsche parts No. 99637505505.

Fits:
Porsche 996 3.4 & 3.6 Manual models except for Turbo GT2 & GT3 models


This part fits the following vehicles:

  • Porsche 911 Anniversary Edition Coupe 3.6L H6 — Chassis 996 (2004)
  • Porsche 911 Carrera 4 Convertible 3.4L H6 — Chassis 996 (1999-2001)
  • Porsche 911 Carrera 4 Convertible 3.6L H6 — Chassis 996 (2002-2004)
  • Porsche 911 Carrera 4 Coupe 3.4L H6 — Chassis 996 (1999-2001)
  • Porsche 911 Carrera 4S Convertible 3.6L H6 — Chassis 996 (2004-2005)
  • Porsche 911 Carrera 4S Coupe 3.6L H6 — Chassis 996 (2002-2005)
  • Porsche 911 Carrera Convertible 3.4L H6 — Chassis 996 (1999-2001)
  • Porsche 911 Carrera Convertible 3.6L H6 — Chassis 996 (2002-2005)
  • Porsche 911 Carrera Coupe 3.4L H6 — Chassis 996 (1999-2001)
  • Porsche 911 Carrera Coupe 3.6L H6 — Chassis 996 (2002-2005)




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

PFR57-530
PFR57-530
PFR57530
99637505505

The product you are viewing cross references to these numbers
Special Offer
PFR57-530BLK
Product Information
Product Information
Powerflex Black Series Gearbox Front Mounting Bush Insert Kit. For vehicles with a single gearbox bush in the end casing.
Replacement for Porsche parts No. 99637505505.

Fits:
Porsche 996 3.4 & 3.6 Manual models except for Turbo GT2 & GT3 models

POWERFLEX Black Series bushes are manufactured using our Black 95 Shore A compound to provide maximum control of chassis geometry. They are designed for the Track, ready to Race and are engineered to be the best.



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

PFR57-530BLK
PFR57-530
PFR57530
PFR57530BLK
99637505505
PFR57-530BLK

The product you are viewing cross references to these numbers
99737503303/2
Product Information
Product Information
Gearbox Transmission Bushing Set, Heavy Duty.

Improve shifting precision and driveline stability with this Gearbox / Transmission Bushing Set.
Designed for Porsche 996 and 997 models, these heavy-duty bushings replace the original soft rubber mounts with a higher-durometer compound and reinforced aluminum cores.
Sold As A Set Of 2.

Fits:

  • Porsche 996 C2 3.6L 2002-2005 (Tiptronic Transmission Only)
  • Porsche 996 C4 3.6L 2002-2005 (Tiptronic Transmission Only)
  • Porsche 996 C4S 3.6L 2002-2005 (Tiptronic Transmission Only)
  • Porsche 996 TURBO 2000-05 (Tiptronic / Manual Transmission)
  • Porsche 996 GT2 2001-05 (Tiptronic / Manual Transmission)
  • Porsche 996 GT3 MKI 1999-02 (Manual Transmission Only)
  • Porsche 996 GT3 MKII 2003>> (Manual Transmission Only)
  • Porsche 997 MK1 Carrera 2 3.6L 2005-08 (Tiptronic Transmission Only)
  • Porsche 997 MK1 Carrera 2S 3.8L 2005-08 (Tiptronic Transmission Only)
  • Porsche 997 MK1 Carrera 4 3.6L 2005-08 (Tiptronic Transmission Only)
  • Porsche 997 MK1 Carrera 4S 3.8L 2005-08 (Tiptronic Transmission Only)
  • Porsche 997 MK1 GT3 2007-09 (Manual Transmission Only)
  • Porsche 997 MKII GT3 2010-11 (Manual Transmission Only)
  • Porsche 997 MKII Turbo 2010-13 (Manual Transmission Only)
  • Porsche 997 MKII GT2 RS 2011-13 (Manual Transmission Only)

Fits On To Diagram Ref No 1

What This Product Does:
  • Support and Mount the Transmission - They hold the gearbox (transaxle) in place relative to the chassis, keeping it aligned and preventing undesired motion.
  • Absorb Vibration & Isolate Noise - The bushings dampen transmission vibration and drivetrain noise, improving comfort.
  • Control Drivetrain “Slop” / Play - Stiffer bushings reduce the amount of twist or movement under torque load, minimizing driveline lash or unwanted movement when accelerating, shifting, or off the throttle.
  • Maintain Geometry & Alignment - Properly mounted gearbox prevents shifting of driveline angles, which helps protect CV joints, driveshafts, and reduces undue stress elsewhere.

Symptoms Of Worn / Failing Transmission Bushings:
  • Clunking, knocking, or banging noises during shifts, on throttle application, or when decelerating
  • Driveline lash / slop — a sensation of delay or “slack” before power transfer
  • Increased vibration or harshness felt in the cabin, especially under load or gear changes
  • Gearbox movement — the transmission may move or twist noticeably when revs / torque change
  • Wear on adjacent components — e.g. CV joints, driveshafts, differential support bearings may see accelerated wear

Why Replacement Matters:
  • Restores Sharpness & Responsiveness — by eliminating soft or worn mounts, the drivetrain becomes more responsive and direct.
  • Reduces Noise, Vibration & Harshness — a proper bushing absorbs and isolates vibration better than degraded old rubber.
  • Protects Other Drivetrain Parts — reduces stress on CV joints, couplings, differential mounts due to movement or misalignment.
  • Preserves Safety & Durability — under high torque loads (e.g. hard driving), a weak mount can twist excessively and cause damage.
  • Better Handling Feedback — with less transmission movement, throttle transitions and engine braking feel more controlled and precise.



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

99737503303
99737503303
99637503303
99637533103
99637503302
99737503302
99737503301

The product you are viewing cross references to these numbers
Special Offer
99737503303/1
Product Information
Product Information
Heavy duty transmission bushing for Tiptronic gearboxes.
Sold as a set with (2) bushings included per kit to complete a single car.
Type: Racing / Motorsport

Fits:
Porsche 996 C2 / C4 / C4S 2002-2005 TIPTRONIC only
Porsche 996 Turbo 2001-2005 MANUAL & TIPTRONIC
Porsche 996 GT3 MKI & MKII 2000-2005 MANUAL only

Porsche 997 C2 / C4 / C2S / C4S TIPTRONIC only
Porsche 997 Turbo MKI 2006-2009 MANUAL & TIPTRONIC
Porsche 997 Turbo MKII 2010-2013 MANUAL only
Porsche 997 GT3 MKI & MKII 2007-2013 MANUAL only


HD transmission mounts replace your OEM transmission carrier bushings with our 25% stiffer bushings**. These units install the same as factory bushings and will eliminate clunks and driveline slop often associated with original rubber units. These high quality units feature aluminum center bushings and splined outer races filled with harder durometer rubber for perfect fitment and long service life. A perfect answer for those who want less driveline play but don't want harshness associated with semi solid and solid mounts.

Fits inside Porsche OE part 99737503303, or 99637503303

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

99737503303
99737503303
99637503303
99637533103
99637503302
99737503302
99737503301

The product you are viewing cross references to these numbers
S151
Product Information
Product Information
Rennline RWD Conversion spindle kit.
Includes two (2) spindles.

rennline

Fits:
Porsche 996 C4 / C4S / Turbo / Turbo S
Porsche 997 C4 / C4S

PRODUCT DESCRIPTION
These RWD conversion spindles will allow you to remove your front axles, differential, and driveshaft allowing you to convert your AWD 996 or 997 to RWD. This conversion will increase the performance of your 911 by removing nearly 100 lbs. of weight while simultaneously reducing the amount of drivetrain loss. This will improve the driving dynamics to handle more akin to the infamous 911 GT3 & GT2. Due to our spindles having integrated ABS reluctor rings like the OEM c/v shafts, no ABS or PASM warning lights will ruin your fun and all electrical systems will retain full functionality. Each spindle is machined from durable carbon steel and coated with yellow zinc to prevent corrosion, ensuring our spindles will last a lifetime. This modification is completely reversible and does not require permanently modifying any parts on your car.
DISPLAYING 1 to 7 (of 7 products)
Also found on these pages
About Gearbox mounts

Porsche Gearbox Mounts

At Design911, we supply a wide range of gearbox mounts for Porsche models, from OEM-style replacements to uprated performance mounts that help control drivetrain movement and keep your Porsche feeling precise and responsive.

Why do Porsche Gearbox Mounts matter?

Gearbox mounts sit between the transmission and the chassis of your Porsche, supporting the weight of the gearbox and controlling how much it can move under load. As rubber ages or higher demands are placed on the drivetrain, standard mounts can soften or crack, allowing excess movement, extra vibration and less consistent shift quality. Replacing tired mounts or choosing a suitable performance option helps restore a more connected feel and protects surrounding components from unwanted movement.

  • Keep the gearbox properly supported and aligned under normal driving and acceleration
  • Help manage vibration and harshness so your Porsche remains refined in daily use
  • Reduce unwanted drivetrain movement that can contribute to shunt, knocks or vaguer shifting
  • Support long-term driving enjoyment and can complement other chassis or transmission upgrades

Common options & kits

Individual replacement parts – Specific gearbox mounts or inserts to address a particular worn component without changing everything at once.

  • Ideal for targeted repairs
  • Lets you replace only what is needed
  • Helps keep initial costs under control

Matched sets or pairs – Components supplied together so related mounts are renewed at the same time.

  • Consistent feel and behaviour across the drivetrain
  • Helps avoid uneven wear or mixed characteristics
  • A sensible choice for routine maintenance

Complete kits – Grouped parts designed to refresh a whole mounting arrangement in one go, useful for more involved upgrades and restorations.

  • Everything specified in a single package
  • Saves time compared with sourcing parts individually
  • Ideal when upgrading or restoring your Porsche

Brands available in this category

For this category we stock a wide choice of trusted brands for Porsche models. You can also browse and filter by brand on this page to focus on your preferred manufacturers.

9products – Precision-engineered performance components for Porsche driveline and chassis applications, including solid and semi-solid mounts aimed at drivers who want a very direct connection and track-capable hardware.

Eurowise – Parts developed with off-road and durability-focused use in mind on certain Porsche models, typically chosen where extra robustness and control are priorities.

OE Match – OE-equivalent components aimed at maintaining original behaviour and refinement, a good fit when you want stock-like feel and sensible running costs.

Powerflex – Polyurethane solutions in areas where they apply, chosen when owners want firmer control and longer-lasting material than ageing rubber, with the trade-off of a more direct feel.

Prekom – Stock-replacement steering and suspension specialists with OEM links on various Porsche parts, useful when restoring predictable, factory-style behaviour.

When should you review or replace your Porsche gearbox mounts?

Checking gearbox mounts regularly helps you spot wear, damage or age-related deterioration before it affects refinement or leads to further issues elsewhere in the drivetrain or exhaust system.

  • Clunks or thumps during gear changes, on/off throttle, or when taking up drive
  • Increased vibration through the cabin or a more “droney” feel than before
  • Drivetrain shunt, judder, or a less precise, more inconsistent shift feel
  • Signs that the gearbox is sitting low or has shifted position, sometimes linked with exhaust or heat shield contact noises

If any of these apply, it is a good time to review your gearbox mounts and replace anything that is past its best so your Porsche stays dependable and enjoyable to drive.

Explore Porsche gearbox mounts with Design911

Browse gearbox mounts for Porsche at Design911 — from individual replacement mounts to complete performance-focused solutions — and find options to suit everyday maintenance, subtle upgrades and full projects.

You may also like
Popular Models