If you're installing a modern engine (LS, LT, etc) or transmission (4l60E, 4l80E, 6l80E, etc.) in your vintage 4X4, this kit equips the NP241C transfer case to supply the necessary electronic vehicle speed signal that the engine/trans will be looking for. NO TUNING OR SIGNAL PROCESSING REQUIRED. This kit removes the mechanical speedometer driver hardware and replaces it with an electronic vehicle speed sensor.
Our conversion kit is a 100% bolt on installation that does not require any irreversible transfer case modifications. It works well with OEM as well as aftermarket transmission/engine controllers such as the Holley Terminator system. A pigtail is supplied to adapt the supplied speed sensor to aftermarket wiring harnesses.
Applicability: 1989 model year NP241C transfer case (this is a one year only, mechanical speedometer drive, NP241C found in '89 Chevrolet K5 Blazers and Suburbans)
Kit includes:
- Installation instructions
- Reluctor Wheel (generates 40 pulse/revolution signal expected by GM ECMs, aftermarket trans. controllers and Holley Terminator systems)
- VSS Adapter plug
- Silicone O-ring
- Stainless steel retainer plate
- Vehicle speed sensor
- VSS pigtail (12")
NP241 electronic VSS conversion kit (R2)
The passenger side drop, New Process 208 and 241 transfer cases were a common transfer case used through the 80’s and early 90’s in full size Chevrolet/GMC applications. The 208 was offered exclusively with a mechanical speedometer drive and the 241 was also equipped with this until the ’90 model year when it was switched to offer an electronic vehicle speed sensor. While an NP205 transfer case is a popular case for extreme off roading, the 208 and 241 are very durable, low cost, and will perform well in light to medium duty four-wheel drive applications. One drawback of them though is that for pairing with modern engine applications, often an electronic vehicle speed signal is required. While the electronic vehicle speed signal 241s are an option, they are somewhat difficult to source due to their 2 year production run. This in mind, the solution we’ve developed is this kit which converts a mechanical speedometer drive case to offer an electronic vehicle speed sensor output.