Due to high demand, tuning turnaround is a minimum of 2 weeks. Current lead times on custom built turbos is ~1 month. Please plan accordingly. We thank you for your support of the finest parts available for the 6.5L Turbo diesel platform!

6.2/6.5 Diesel 6L80E/6L90E 6 Speed Conversion Kit

6.2/6.5 Diesel 6L80E/6L90E 6 Speed Conversion Kit

Quadstar Tuning LLC

  • $2,500.00
  • Save $250

Everything you need, except the transmission, to swap a true 6 speed automatic behind your 6.2 or 6.5 diesel!  This will work with both mechanical and electronic injection trucks (DB2 or DS4) and 6L80 or 6L90 transmission.

This kit will require the willingness to perform final tuning on your end.


  • PCS transmission communication module with universal wiring harness
  • HP Tuners MVPI 2 Interface for tuning the transmission's internal TECM/TCM
  • Base transmission tune file
  • Custom multi-disk torque converter
  • Bellhousing adapter kit with hardware and dowel pins
  • ARP torque converter bolts
  • ARP flexplate bolts
  • 6AN Transmission line adapter block
  • Crank sensor breakout harness for DS4 trucks
  • Wiring instructions
  • Informational documents for transmission selection
  • Informational documents for transfer case re-use or swap compatibility

Additional Options available by request:

  • Paddle Shifter tap shift kit
  • Toggle switch tap shift kit
  • DS4 trucks will require a tune to the factory ECM/PCM to disable factory automatic transmission control and trouble codes.
  • Tuning support

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