PEAK Transmission Cooler Kit (MY25+ Musso & Rexton with Electric Power Steering)

The PEAK Bolt-On Transmission Cooler Kit is built specifically for MY25+ Musso and Rexton models with Electric Power Steering (EPS). These vehicles do not use the same hydraulic power steering cooler setup as earlier models, so this kit is designed to cool the transmission only — clean, correct, and without unnecessary components.

If you tow, load up, or drive long distances, this kit targets the real issue: transmission heat under load.

Key Features

• Transmission-Only Cooling (EPS Specific)
  Designed for MY25+ Electric Power Steering vehicles — no power steering cooler included or required.
• Bolt-On Fitment (Correct for MY25+ Layout)
  Purpose-fit mounting and routing intended for MY25+ front-end packaging.
• Designed for Towing and Load
  Helps reduce ATF heat rise and thermal stress during demanding use.
• Clean, Simple System
  Less complexity, fewer components, and a straightforward install on the correct vehicles.

Critical Fitment Note (Read Carefully)

• MY25+ EPS Only
  This kit suits MY25+ Musso/Rexton with Electric Power Steering.
• Earlier Models Must Use the Combined Kit
  Earlier Musso/Rexton models use Hydraulic Power Steering (HPS) and must use the Transmission + Power Steering Cooler Kit.
  Reason: on hydraulic-steering vehicles, the cooler assembly sits in the same position as the power steering cooler line, so the MY25+ transmission-only kit is not compatible with earlier models.

Specifications

Vehicle Compatibility: MY25+ KGM/SsangYong Musso & Rexton (Electric Power Steering models only)
Cooling Type: Transmission only
Mounting Style: Bolt-on, MY25+ EPS-specific layout
Included: Transmission cooler system components and mounting hardware (as supplied with kit)

Installation & Maintenance

Installation Notes

• MY25+ EPS models only — confirm steering type before purchase
• Professional installation recommended
• After install, check routing/clearance, verify no leaks, and confirm airflow is unobstructed
• Please Note: Installation requires approximately 350ml of additional transmission fluid

Maintenance Guidelines

• Inspect mounts, fasteners, and connections periodically
• Keep cooler face clean to maintain airflow
• Re-check fittings after initial run-in period

Installation Guide: Download