GKTech Nissan Z33 350Z/Z34 370z transmission conversion crossmember for 240sx

The GKTech Transmission Conversion Crossmember is a bolt-in solution for fitting a Z33 or Z34 6-speed transmission into an S13, S14, or S15 240SX/Silvia chassis. Swapping in a 350Z or 370Z CD009/CD00A gearbox provides a massive strength upgrade over the factory 5-speeds, but the transmission mount doesn’t align with the stock crossmember. GKTech’s solution correctly positions the transmission, providing the support needed for a reliable, long-term drivetrain setup.

CNC-machined and fabricated from laser-cut steel, this crossmember bolts directly to the factory transmission tunnel and uses a standard Z33/Z34 transmission mount, offering OEM-style support for a non-OEM setup.

Key Features:

• Enables Z33/Z34 6-Speed Swap: Designed specifically for CD009/CD00A conversions

• Bolt-In Design: Uses factory mounting holes in S13/S14/S15 chassis

• Strong, Reliable Construction: Laser-cut steel with durable welds and finish

• Retains OEM Mounting Hardware: Works with Z33/Z34 transmission mount

Specifications:

• Material: High-tensile laser-cut steel

• Finish: Black powder coat

• Install Time: ~1–2 hours

Compatibility:

• Nissan 240SX / Silvia (S13 / S14 / S15 – RWD only)

• For use with Nissan 350Z (Z33) or 370Z (Z34) 6-speed manual transmissions
  Not compatible with automatic or non-Z transmissions.

What’s Included:

• (1) Transmission crossmember

• (1) Hardware kit (if applicable)

Notes:

• Requires Z33 or Z34 transmission mount (not included)

• Driveshaft, shifter, and clutch system modifications required for full swap

• Best paired with GKTech shifter relocation kits and clutch solutions for full integration

• Professional installation recommended for drivetrain swaps

Make your 6-speed swap a bolt-in breeze with GKTech’s Transmission Conversion Crossmember—engineered for strength, simplicity, and perfect fitment in your S-chassis.