Porsche > 924 (1977-1988) > Gearbox / Transmission > Gearbox Mounts >

Gearbox Transmission Bushing Set, Heavy Duty. Porsche 996 / 997

Gearbox Transmission Bushing Set, Heavy Duty. Porsche 996 / 997 - 99737503303

3 3 3

Prekom

99737503303/2

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.