TRX4 Scale Radiator Conversion TRX4ZSP56C by GPM  [TRX4ZSP56C]

Scale cooling assembly for TRX4 Trail Crawlers

The TRX4ZSP56C engine radiator from GPM is an RC-scale cooling assembly intended for TRX4 Trail Crawler V8 LS3 style vehicles. It integrates a compact fan with a radiator body positioned in the motor area to replicate engine cooling, using a welded temperature sensor to operate the fan automatically.

The temperature sensor engages the fan at about 35°C (±5°C) and disengages near 25°C (±5°C). The fan delivers approximately 3.25 CFM (±10%), providing airflow through the radiator when the sensor is active.

Materials comprise an aluminum and stainless steel main body with a black heat-resistant ABS cover and exhaust pipe. Unit dimensions are 52mm x 63mm x 71mm and the item ships as a single engine radiator unit (1 pcs) for scale placement in the motor bay.

Follow the installation notes for TRX-4 variants: Defender installations may need removal of the manifold side to clear the unit and trimming of the original body post crossbar to align the intake pipe. For front-engine layouts the manifold can be relocated to the original damper mount and fender after removing the manifold, but a flat-style front damper mount such as GPM Racing #TRX4028 or an equivalent is required to free space for both left and right manifolds.

This component is intended as a scale cooling upgrade and may need body or manifold modification on some TRX-4 builds; confirm mounts and clearances prior to installation.