Overview This plug-and-play T56 transmission harness eliminates the guesswork when connecting your T56's vehicle speed sensor to your Haltech Rebel LS ECU. Purpose-built to mate with the transmission breakout connector on the Rebel LS terminated harness, it delivers clean VSS signal integration without splicing or modification. Technical Specifications Part Number: HT-187003 Connector Type: Plug-and-play with Rebel LS transmission breakout Application: T56 transmission vehicle speed sensor Harness Length: Optimised for engine bay routing Construction: OEM-grade terminals and weather-resistant connectors Why You Need This The T56's VSS signal is critical for proper transmission control, speedometer function, and traction control systems in LS swaps. Without this dedicated adapter, you're left splicing into the main harness or fabricating connections that often fail under heat and vibration. We've seen countless builds where bodged VSS wiring causes intermittent speedo issues, transmission hunting, or complete signal dropout during spirited driving. This harness is essential for T56-equipped builds like E46 LS swaps, S-chassis conversions, or classic muscle car EFI upgrades where the transmission speed signal feeds critical ECU functions. The plug-and-play design maintains the integrity of your main Rebel LS harness whilst providing a clean, serviceable connection to the transmission. Popular in drift builds where VSS accuracy affects launch control and gear-dependent boost maps. ECU & System Compatibility Specifically designed for the Haltech Nexus Rebel LS ECU when used with the Rebel LS terminated main harness (HT-186500). The transmission breakout connector integrates seamlessly with the Rebel's built-in transmission control functions and VSS input processing. What's in the Box T56 transmission adapter harness with pre-terminated connectors Transmission breakout connector (mates to Rebel LS main harness) T56 VSS connector with sealed terminals Installation documentation Complete Your Build Most customers fitting T56 transmissions also require the main Rebel LS terminated harness (HT-186500) if not already specified. For complex swaps involving custom dash integration, consider our CAN bus display solutions and additional sensor harnesses. Our technical team stocks the complete Rebel LS ecosystem and can recommend the exact combination for your chassis and transmission setup. Contact us for pre-sales advice on harness routing and integration — we've guided hundreds of successful LS conversions through these critical wiring decisions.
