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GM6L80/90E TECHCM

The TEHCM for the GM 6L80/90E is 100% tested with JASPER-designed test equip- ment to verify communication between the computer and all internal inputs including: transmission fluid pressure switches, tem- perature sensor, speed sensors, internal mode switch and solenoids.

GM6L80/90E Support Shaft
JASPER offers upgrades to the early-style GM 6L80/90E transmission such as a modified stator support shaft with updated 1-2-3-4 and 3-5/reverse seal rings and a notched valve body spacer plate gasket.
GM6L80/90E Dynometer Testing
Every JASPER Transmission undergoes dynamometer testing to ensure proper gear ratios, line pressure, cooler pressure and flow, and noise. The TCM, on the GM 6L80/ 90E, is validated using a state-of-the-art CAN software package.

Billet Converter Cover• A billet converter cover is available for all GM 6L80/90 non-captive clutch applications to prevent the front cover from distorting during the converter welding process.

• Early-style stator support shaft is modified for 100% installation of updated 1-2-3-4 and 3-5/reverse seal rings to prevent seal leakage, harsh/delayed shifts, and burnt clutches.

• 100% installation of an updated notched valve body spacer plate gasket on the early-style GM 6L80/90 provides better oiling to the solenoid, which prevents a DTC P0751 code (due to lack of oil to the solenoid).

• The TEHCM (transmission electronic hydraulic control module) is 100% tested using hydraulics and electronics to verify proper operation of the internal mode switch, transmission fluid pressure switches, temperature sensor, speed sensors, and solenoids.


• 100% dynamometer tested for proper gear ratios, line pressure, cooler pressure and flow, and noise. TCM (transmission control module) is validated using state-of-the-art CAN (controller area network) software.


• JASPER Customers may also purchase the Drew Technologies CarDAQ-M/Mega-CAN Bundle at a discounted price and can use available Co-op funds for up to 50% of the reprogrammer’s cost.

Mega Can• CarDAQ is the industry standard

• Excellent J2534 reprogramming support

• Unmatched technical support

• Add new modules as you want, when you want

• Designed for high performance and durability

3 Year / 100,000 Mile Nationwide
Transferable Warranty

Full warranty disclosure available at www.jasperengines.com or
upon request. Specifications subject to change without notice.
Download GM 6L80/90E Flyer

Product Videos

GM 6L80/90 DTC P0751Code

6L80/90 Stator Support Shaft Update

GM 6L80/90 transmission

Value-Added Quality Improvements from JASPER

Issue / Concern:

Converter Clutch Shudder

JASPER Solution:

  • A billet converter cover is available for all GM 6L80/90 non-captive clutch applications to prevent the front cover from distorting during the converter welding process.

2-3 Harsh or Delayed Shift, Harsh or Delayed Shift From Park, Harsh or Delayed Shift from Reverse, Burnt 1-2-3-4 Clutch, Burnt 3-5/Reverse Clutch

  • Early-style stator support shaft is modified for 100% installation of updated 1-2-3-4 and 3-5/reverse seal rings to prevent seal leakage, harsh/delayed shifts and burnt clutches.

Check Engine Light (DTC P0751 Code)

  • Early-style GM 6L80/90 includes 100% installation of an updated notched valve body spacer plate gasket to provide better oiling to the solenoid, preventing a DTC P0751 code (due to lack of oil to solenoid).

TEHCM and/or CAN Software Malfunction and Runability Issues

  • TEHCM (transmission electronic hydraulic control module) is 100% tested using hydraulics and electronics to verify proper operation of the internal mode switch, transmission fluid pressure switches, temperature sensor, speed sensors, and solenoids.
  • 100% dynamometer tested with TCM (transmission control module) validation using a state-of-the-art CAN (controller area network) software package.

Transmission TCM Programming

  • JASPER offers the rental of a remote programming device.

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