G37 Sedan - VR30 Trans Swap Follow-Up & Cost Breakdown - So You Want To VR30 Trans Swap Your G or Z?

Introduction

This tutorial provides a comprehensive guide for performing a VR30 transmission swap on your G37 sedan. It includes a detailed breakdown of costs, necessary parts, and tools required for a successful installation. If you're considering this upgrade, this guide will help you navigate the process efficiently.

Step 1: Gather Necessary Parts

Before starting the swap, ensure you have all the required components. Here’s a breakdown of what you will need:

1. VR30 Transmission

   • Purchase used from sources like eBay.
   • Estimated cost: $1,000 (shipped).

2. Parts from Infiniti Dealer

   • Transmission oil pan gasket: Part # 31397-1XJ0A ($27).
   • Transmission pan drain crush washer: Part # 11026-JA00A ($1).
   • Transmission pan refill crush washer: Part # 31361-1XJ0A ($49).
   • Copper washers for inlet and outlet lines: Part # 21626-32U00 ($20 for 4).

3. Driveshaft

   • One-piece aluminum driveshaft for G37 coupe automatic: Part # INSH5-A ($733, shipped).

4. Transmission Fluid

   • 9-10 quarts of ATF fluid; recommended brand: Valvoline Max Life Full Synthetic.
   • Estimated cost for 4 quart bottles: $36.

5. Additional Tools and Supplies

   • Laser temperature gun ($20).
   • Gear lube pump with Yamaha fitting adapter ($5).
   • Transmission jack ($200).

Total Estimated Cost for Basic Parts

• Approximately $2,091.

Optional Parts

1. Transmission Oil Cooler
   • Braided steel lines: Estimated cost $240.
2. Adapters
   • Two 10AN adapters for cooler line connection: $15.
   • Stainless steel hose barb splitter: $10.

Total Estimated Cost with Optional Parts

• Approximately $2,356.

Step 2: Prepare Your Workspace

Set up a clean, organized workspace that allows easy access to all your tools and parts. Ensure you have:

• Jack Stands: Good height extensions are essential for safety.
• Tool Set: Include an assortment of open box end wrenches, ratchets, sockets (17mm, 14mm, 12mm, and 10mm), extensions (32” minimum), and allen wrenches.
• Miscellaneous Items: Zip ties, blue Loctite, and a drill with metal drill bits.

Step 3: Remove Old Transmission

1. Support the Vehicle: Use jack stands to securely lift the car.
2. Drain Fluid: Remove the transmission pan and drain all fluid.
3. Disconnect Components: Carefully disconnect electrical connectors, lines, and mounts associated with the old transmission.
4. Remove the Transmission: With the help of a transmission jack, remove the old transmission from the vehicle.

Step 4: Install the VR30 Transmission

1. Align the New Transmission: Position the VR30 transmission under the vehicle using the transmission jack.
2. Connect Components: Reattach electrical connectors, lines, and mounts.
3. Install New Parts: Use the new gaskets and washers purchased earlier.
4. Refill Transmission Fluid: Use the gear lube pump to fill the new transmission with ATF fluid.

Step 5: Test and Finalize

1. Check for Leaks: After installation, inspect all connections for leaks.
2. Test Drive: Conduct a short test drive to ensure the transmission operates correctly.
3. Monitor Performance: Keep an eye on performance and transmission temperature during initial drives.

Conclusion

The VR30 transmission swap can enhance your G37 sedan's performance significantly. By following this step-by-step guide, you can tackle the swap confidently. Remember to consider upgrading the flexplate to prevent future issues, as it was noted that the OEM flexplate may break. Good luck with your project, and feel free to reach out with any questions!