Skip to content
Now offering free shipping on all orders over $300! See details.
Now offering free shipping on orders over $300!

Pricing Notice

While we strive to keep our website pricing accurate and up to date, occasional delays in updates may occur when manufacturers change their prices. This means the price shown online may differ from the current price. We recommend contacting us to confirm pricing before placing your order, as we may not be able to honor outdated prices.

Special Order

This item is made to order and may require additional processing time before shipping.

Holley EFI Terminator X Max Transmission Kit - GM 6L80/90

Original price $526.95 - Original price $526.95
Original price
$526.95
$526.95 - $526.95
Current price $526.95

Free returns on all eligible orders

You have 30 days to request a return. All sale items are final sale.

Add GM 6L80/90E transmission control to any existing vehicle utilizing a Terminator X Max ECU. A departure from traditional Holley EFI transmission control, the Terminator X Max ECU allows the ability to use 2007+ GM 6L80E and 6L90E transmissions by communicating via CAN with the internal TCM (Transmission Control Module). The supplied Holley EFI OBDII Transmission Tuning Handheld is used to adjust Shift Points, Tire Size and Gear Ratio. The Terminator X V3 Software provides the ability to dial in Torque Management to optimize the desired shifting characteristics when using a 6L80/90E Transmission. Terminator X V3 software also allows a user to control the Secondary Shift Mode within the Transmission TCM and allows use of Tap Up/Down Shifting.

Within Terminator X V3 PC Software

o Virtual Torque Management Tables

o Virtual TPS Tables to dial in shift characteristics regardless of engine

o DBW and Timing torque reduction tables to create smooth shifts

Within the Holley EFI OBDII Transmission Tuning Handheld

o Ability to read and clear TCM fault codes

o Ability to raise and lower shift points by MPH or RPM

Support for Tap Up/Tap Down & Transmission's Secondary Shift Mode

If you currently have a Terminator X ECU upgrading to a Terminator X Max ECU can be easily done by plugging your main harness into the Max ECU and re uploading your existing calibration

Shipping information

Use this text to share information about your product.

Returns & warranty

Use this text to share information about your product.

Related categories

Warehouse Sale

Our most anticipated sale of discontinued items has finally arrived! While supplies last.

Open Box Deal

Their return, your reward! Starting today, shop new exclusive products for less.

Free Shipping

When you spend $50 or more

Here to Help

Get in touch with us 7 days a week

Store Pickup

Pick up your order yourself, for free

Easy Exchanges

Return or exchange within 60 days

Compare products

{"one"=>"Select 2 or 3 items to compare", "other"=>"{{ count }} of 3 items selected"}

Select first item to compare

Select second item to compare

Select third item to compare

Compare