Haltech NEXUS Ti4L Transmission Interface Kit

Haltech NEXUS Ti4L Transmission Interface Kit for GM 4L-Series Automatics

Part Number: HT-196001

The Haltech NEXUS Ti4L adds integrated control of supported GM 4L-series automatic transmissions to a Haltech NEXUS ECU or VCU.

For NEXUS Rebel LS installations, the supplied terminated transmission harness connects directly to the transmission breakout connector on the Rebel LS engine harness. Transmission selection and initial configuration are handled through the Rebel LS Setup Wizard, avoiding the separate standalone transmission controller, duplicated sensors, and disconnected engine-and-transmission strategies common in conventional LS swap installations.

The Ti4L also uses an included 500 psi line-pressure sensor for closed-loop pressure control and long-term learning. This allows the NEXUS system to compare commanded pressure with actual transmission pressure and adapt the control strategy as the vehicle is driven.

Key Features

• Supports selected GM 4L60E, 4L65E, 4L70E, 4L80E, and 4L85E automatic transmissions
• Plug-and-play connection to the NEXUS Rebel LS terminated engine harness
• Compatible with Haltech NEXUS-series ECUs and VCUs
• Fully terminated GM 4L-series transmission harness
• Closed-loop transmission line-pressure control
• Long-term line-pressure learning
• Included 500 psi pressure sensor
• Included remote-mount hose and fittings for the line-pressure sensor
• Transmission configuration through Haltech NSP software
• Rebel LS Setup Wizard support
• Haltech Connect App setup support for Rebel LS applications
• Integrated engine and transmission data, control strategies, and logging through the connected NEXUS ECU or VCU
• Sealed IP66 enclosure
• Dedicated transmission inputs and outputs preconfigured for the supplied harness

Kit Includes

• HT-196001 — NEXUS Ti4L Transmission Interface
• HT-187000 — NEXUS 4L-series terminated transmission harness
• HT-010917 — 500 psi pressure sensor
• 1/8 NPT male to -4 AN male 90-degree fitting
• -4 AN male to 1/8 NPT female adapter
• 18 in. (450 mm) -4 AN female-to-female hose assembly
• Insulated P-clamp for remote pressure-sensor mounting
• M8 × 30 mm stainless-steel socket-head bolt
• 10 mm aluminum mounting spacer
• Quick Start Guide

Technical Specifications

• Compatible controllers:
  • NEXUS Rebel LS ECU
  • NEXUS-series ECUs
  • NEXUS-series VCUs
• Communication:
  • Haltech CAN
• Main connector:
  • 34-pin AMP Superseal, Type 2 keyway
• Status indicator:
  • Green LED for normal operation
  • Orange LED for boot mode
• Operating-voltage range:
  • 8–22 V
• Maximum ambient operating temperature:
  • 221°F (105°C)
• Environmental protection:
  • IP66
• Dimensions:
  • 4.33 × 2.76 × 1.34 in. (110 × 70 × 34 mm)

Dedicated Inputs

• Transmission-fluid-temperature input
• Transmission line-pressure input
• Turbine/input-shaft-speed input
• GM 4L60E/4L80E range-switch A input
• GM 4L60E/4L80E range-switch B input
• GM 4L60E/4L80E range-switch P/C input

Dedicated Outputs

• 1–2 shift-solenoid control
• 2–3 shift-solenoid control
• Torque-converter-clutch on/off control
• Electronic line-pressure-control solenoid
• 3–2 control solenoid
• Pulse-width-modulated torque-converter-clutch control

Application Notes

• Supported transmissions include:
  • 4L60E and 4L65E, non-4WD, 1995 and later
  • 4L70E, non-4WD, 2006–2008
  • 4L80E and 4L85E, non-4WD, 1994 and later
• The 2009-and-later 4L70E uses a different main transmission-connector pinout and is not supported by the supplied harness.
• The 1991–1993 4L80E uses a different main transmission connector and is not supported by the supplied harness.
• Haltech specifies this kit for non-4WD transmissions. Compatibility should not be assumed for 4WD versions or transmissions converted between 2WD and 4WD configurations.
• The Ti4L is an expansion interface for a compatible NEXUS ECU or VCU. It is not a standalone transmission controller.
• Elite, Platinum, and earlier Haltech ECU families are not supported.
• Installation with a NEXUS Rebel LS terminated harness is plug-and-play at the transmission-breakout connection.
• Universal NEXUS ECU and VCU installations require the transmission-breakout connector to be wired to ECU power, ground, Haltech CAN, vehicle-speed input, and signal ground.
• The supplied harness connects to the transmission’s main connector, vehicle-speed sensor, line-pressure sensor, and turbine-speed sensor where fitted.
• The 4L60E does not use a turbine/input-shaft-speed sensor. The unused turbine-speed connector is left disconnected in that application.
• The included pressure sensor installs at the transmission’s 1/8 NPT line-pressure test port.
• The supplied hose, fittings, clamp, bolt, and spacer allow the line-pressure sensor to be mounted remotely when clearance around the transmission case is limited.
• Installing and correctly calibrating the supplied pressure sensor is required for closed-loop line-pressure control and the associated learning strategy.
• The Ti4L’s transmission inputs and outputs are assigned specifically for the HT-187000 harness and cannot be reassigned to unrelated functions.
• Transmission type, line-pressure calibration, shift behavior, torque-converter-clutch operation, and related tables are configured through Haltech NSP.
• Completing the Rebel LS Setup Wizard creates the initial transmission configuration and input/output assignments. Final shift scheduling, pressure control, converter behavior, and torque-management calibration must still be matched to the transmission, converter, vehicle weight, gearing, tire size, engine output, and intended use.
• The transmission must use the supported factory-style solenoid, range-switch, temperature-sensor, and connector arrangement. Internally modified or aftermarket-controlled transmissions may require compatibility confirmation.

Haltech Usage Notice

Haltech products are designed and sold for sanctioned off-road, competition, and non-emissions-controlled applications. The purchaser and installer are responsible for confirming compliance with all applicable federal, state, and local emissions and vehicle-use regulations.