Gearbox Mounts

Engine gearbox mount bracket.


Fits:
Porsche 997 C2 / C4 2005-08 TIPTRONIC
Porsche 997 TURBO 2007-09
Porsche 997 TURBO 2010-12 (G97.55)
Porsche 997 GT3 2007-11 (G97.90)

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Diagram ref no 3

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Related, superseded, cross reference or alternative numbers for comparison.

99737511501

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Engine gearbox mount.



Fits:
Porsche 996 C2 / C4 2002-05 TIPRTONIC
Porsche 996 TURBO 2001-05
Porsche 996 GT3 2000-05

Porsche 997 C2 / C4 2005-08 TIPTRONIC
Porsche 997 TURBO 2007-09

Porsche 997 TURBO 2010-12 (G97.55)
Porsche 997 GT3 2007-11 (G97.90)

This product supersedes Porsche's old part numbers:
- 99637503303
- 99737503301
- 99737503302

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Diagram ref no 1

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99737503303

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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.

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PFR57-531

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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.

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PFR57-531BLK

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Gearbox suspension hook.

Fits:
Porsche 996 C2 / C4 2002-05 Tirptonic
Porsche 996 Turbo / GT2 2001-05 Manual
Porsche 996 Turbo 2001-05 Tiptronic
Porsche 996 GT3 2001-05 Manual
Porsche 997.1 C2 / C4 2005-08 Tiptronic
porsche 997.1 Turbo / GT2 2007-09 Manual
Porsche 997.1 Turbo 2007-09 Tiptronic
Porsche 997.2 Turbo / GT2 RS 2010-13 Manual
Porsche 997 GT3 / GT2 RS Manual

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Diagram ref no 2

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99744910150

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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
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99737503303

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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
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99737503303

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Transmission mount bushing kit.
Kit contains (2) Replacement rubber bushings.



Fits:
Porsche 996 C2 / C4 2002-05 TIPRTONIC
Porsche 996 TURBO 2001-05
Porsche 996 GT3 2000-05

Porsche 997 C2 / C4 2005-08 TIPTRONIC
Porsche 997 TURBO 2007-09

Porsche 997 TURBO 2010-12 (G97.55)
Porsche 997 GT3 2007-11 (G97.90)

Click 'Zoom in' for large parts diagram.
Diagram ref no 1

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99737503303KIT

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Stud M10 x 83 engine and gearbox mounting. 

Fits:
Porsche 996 - 1997 to 2004
Porsche 997.1 -  2005 to 2008
Porsche 997.1 turbo - 2007 to 2008
Porsche 987 Boxster / Cayman - 2005 to 2012

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Diagram ref no 6

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99906110601

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