LS Transmission Adapter Harness

Put a 4L80E in your vehicle easily with this adapter harness (requires tune for segment swap)

Product Details

• Includes: 18" adapter harness
  
• Includes: 1 transmission adapter harness with vehicle speed sensor (VSS) breakout connector
  
• Used to retain all appropriate electrical connections to transmission when converting from 4L65E/4L70E to 4L80E
• ECM tuning required
• Supplied VSS connector plugs into "front" Input Speed Sensor in transmission. Connector from engine harness plugs into rear VSS sensor in transmission.
• Sealed, crimped, and assembled in Wichita, Kansas using USA made OEM grade TXL wire, OEM connectors, locks, seals, and terminals for proper fit and a positive, audible click when connected

**DO I HAVE A 4l60e, or a 4L65e, or a 4L70e??

• The 4L75e is not a production transmission and was only available through a GM parts distributor
• If your original transmission has an internal input speed sensor, 4L65e, 4L70e, 4L75e (beginning in 2006 through 2008), the WATRA31-18 is required.
• Check your ECU in the red (or green connector) for a Red-Black Stripe wire at pin 22, and a blue-white stripe wire at pin 23**or**
• In the TCM, Red-Black Stripe at pin 3, and Blue-White Stripe at pin 45. If these wires are not there, then you do not have an internal input speed sensor, so you would need the WATRA30-18
• Check your RPO codes in your glove box for RPO M30 (4L60e) or M32 (4L65e). This may or may not guarantee that you don t have an internal speed sensor.
• Count the pins on your original harness transmission connector:
• If you have 11 pins, you will need the WATRA30-18;
• If you have 13 or more pins, then you will need the WATRA31-18

Compatible Parts

• Compatible with GM 4L65E & 4L70E vehicles (2006-2008) (connects to 4L80E transmission)

Helpful Links

• 4L80E transmission pigtail
• 4L60 to 4L80 transmission component 

Need a custom length? We can build most wiring to your required length within 48 hours. Custom lengths are typically around 2× the listed price. Contact us for pricing.