DD84 Holley EFI 4L80E Custom Transmission Calibration

Custom Holley EFI 4L80E Transmission Calibration

Send DD84 your current Holley EFI Global File and complete transmission setup. We will review the file and prepare a customer-specific 4L80E transmission-control baseline for compatible Holley EFI systems.

How It Works

1. Purchase this calibration service.
2. Email your Holley Global File and complete transmission information to downdirty84llc@gmail.com.
3. Use the subject line: Holley 4L80E Calibration – Order #[order number] – [name].
4. DD84 returns the calibrated file electronically after review.

Typical turnaround: 24–48 business hours after all required information is received.

Included

• Review of the customer-supplied Holley EFI file
• Baseline shift scheduling
• Starting line-pressure strategy
• Torque-converter clutch control setup
• Part-throttle and wide-open-throttle shift starting points
• One initial calibrated file returned by email

Email With Your File

• Shopify order number
• Holley ECU model, software version, and firmware
• Vehicle year, make, model, approximate weight, and intended use
• Engine combination and estimated horsepower and torque
• 4L80E year, internal modifications, valve-body type, and shift-control configuration
• Converter stall speed and lockup configuration
• Rear gear ratio and loaded tire diameter
• Input/output speed-sensor setup, range selection, brake-switch input, and temperature-sensor details
• Desired shift feel, wide-open-throttle shift RPM, lockup strategy, current problems, and datalogs when available

Not Included

• Engine fuel or ignition calibration
• Unlimited revisions or ongoing datalog support
• Mechanical diagnosis or repair of the transmission

Safety notice: This is a starting calibration, not a universal finished transmission tune. Safe line pressure, shift timing, and converter-clutch operation depend on the transmission build, valve body, clutch clearances, converter, power level, vehicle weight, and speed-sensor setup. Final settings must be validated through controlled testing and datalogs.

Down Dirty 84 LLC is an independent calibration provider and is not affiliated with or endorsed by Holley Performance Products or General Motors. Compatibility and the accuracy of submitted information are the purchaser’s responsibility. Sales are final after calibration work begins except where required by law.