The JRP trans temp adapter has been designed to provide a clean, simple and professional way to install a transmission temperature sensor into your vehicle’s cooler lines.
When installing a trans temp sensor, finding a neat and reliable mounting solution can often be the hardest part of the job. These inline adapters solve that problem by allowing you to cut into your transmission cooler line and securely install your sensor without complicated fabrication or unreliable fittings.
Integrated 1/8 NPT Sensor Port
Each transmission temp adapter features a dedicated 1/8 NPT sensor port, which is the industry standard thread used by most aftermarket transmission temp sensors and gauges.
This allows you to thread your trans temp sensor directly into the adapter body for accurate real-time fluid temperature readings inside the cooler line. The tapered 1/8 NPT thread design ensures a secure seal when installed correctly with thread sealant, making it ideal for transmission fluid applications.
This makes the JRP trans temp adapter compatible with a wide range of transmission temperature gauges, including our Gear-X trans temp gauges and our 14in1 system which supports transmission temp monitoring.
Designed for Flexibility – M18x1.5 Line Ports
Each adapter body also features dual M18x1.5 threaded line ports, giving you the flexibility to choose from a wide range of fittings to suit your setup.
We offer these adapters:
- As a standalone unit (so you can source your own M18x1.5 to AN or barb fittings)
- With optional fittings including:
- M18x1.5 to 5/16” barb
- M18x1.5 to 3/8” barb
- M18x1.5 to 1/2” barb
This gives you maximum flexibility for custom builds, 4x4 applications, towing vehicles, and performance setups where accurate transmission temp monitoring is critical.
Purpose-Built for JRP Trans Temp Gauges
We developed this trans temp adapter because we sell a large volume of our Gear-X trans temp gauges, and our 14in1 system also supports transmission temp monitoring. We saw a clear gap in the market for a simple, well-machined inline solution that customers could rely on.
There are very few properly designed transmission temp adapters available, especially ones offering genuine fitting flexibility. This adapter was designed specifically to suit real-world installations and remove guesswork from the process.
Quality Fittings & Secure Hose Retention
Our optional barb fittings are high-quality alloy fittings supplied with crush washers to ensure a clean and secure seal between the fitting and the adapter body.
When barb fittings are selected, we include fuel-injection style hose clamps. These are superior to standard worm-drive clamps for this application because:
- They feature a smooth inner band
- They provide even clamping pressure
- They reduce the risk of hose pinching or cutting
- They help prevent loosening over time from heat cycling and vibration
When installing any transmission temp adapter into cooler lines, secure hose retention is critical. Using proper fuel-injection clamps ensures your trans temp setup remains safe and reliable under heat and pressure.
A Simple Solution in a Limited Market
If you’re looking for a trans temp adapter that offers genuine flexibility across hose sizes and fitting styles, the JRP transmission temp adapter is a reliable and professional solution in a very limited market segment.
Whether you’re adding a standalone trans temp gauge or integrating transmission temp into a multi-gauge system, this adapter gives you a straightforward way to install your sensor correctly.
If you’re unsure whether this trans temp adapter will suit your vehicle or cooler line setup, reach out to our team. We’re always happy to walk through your installation and help make sure your transmission temp monitoring is done right the first time.
