CSF Transmission Oil Cooler for JL / JT Jeep Wrangler and Gladiator [8344]

CSF Transmission Oil Cooler for JL / JT Jeep Wrangler and Gladiator [8344]

The CSF Transmission Oil Cooler for the Jeep Wrangler JL and Gladiator JT is a high-performance upgrade engineered to handle the rigors of off-road driving, heavy towing, and demanding conditions. Featuring a durable black-coated finish for enhanced corrosion resistance and stealth aesthetics, this direct-fit cooler significantly improves transmission fluid temperatures compared to the factory unit. Designed to bolt in without modification, it ensures reliable cooling performance and increased transmission longevity — ideal for Jeep owners who demand durability and performance from their drivetrain.

Design & Engineering

• When transmission fluid temperatures rise, performance degrades and long-term wear accelerates. The Jeep Wrangler and Gladiator are known to experience transmission temperatures exceeding 250°F during towing and off-road use. While short-term effects may go unnoticed, prolonged exposure to high temps inevitably shortens transmission life. More critically, being forced to stop and wait for the system to cool is a compromise that has no place in a Wrangler. CSF addresses this with a purpose-built transmission oil cooler that eliminates overheating concerns. Engineered with CSF’s exclusive AC Condenser Technology, the cooler features Super High-Pressure 16mm 10-Channel Microtube architecture to maximize oil flow and cooling surface area — resulting in significantly reduced temperatures in all driving scenarios.

CSF vs OEM

• The OEM transmission cooler on the JL and JT is minimal — suitable for daily driving but insufficient for modified or off-road builds. Upgrades such as oversized tires or roof accessories can quickly push the system beyond its limits. The CSF Transmission Oil Cooler is an essential solution for any serious off-road setup.
  • 34% larger core volume and 68% more fluid volume than the factory cooler
  • Dual pass core vs factory single pass design
  • Double the number of cooling tubes and fin rows compared to factory
  • Perfect for daily driving, overlanding, and off-road adventures

Plug & Play Installation

• Designed for convenience and performance, CSF’s transmission oil cooler and radiator are engineered as direct replacements for factory units. With a Plug-and-Play “Drop-in Fit” installation that typically takes just 2-3 hours, this system delivers increased reliability and long-term protection for both engine and transmission.

Features

• With CSF’s new ultra-efficient 5mm fin cooling technology
• Made with CSF’s AC condenser technology using a 1-row super-high pressure 16mm 10-channel microtube for optimal oil flow and maximum surface area contact
• 19 rows of 5mm tall multi-louvered fins
• Welded all-aluminum construction
• OEM style inlet / outlet connections
• 34% larger core volume and 68% more fluid volume than the factory cooler
• Drop-in fit requires no modifications to install
• Black finish for OEM+ look
• 2-year limited warranty
• Pairs well with the CSF Heavy-Duty Radiator

Specifications

• # Core Rows:
  • CSF: 2
  • OEM: 1
• # Cooling Tubes:
  • CSF: 5 (front) + 12 (back)
  • OEM: 8
• # Cooling Fin Rows:
  • CSF: 6 (front) + 13 (back)
  • OEM: 9
• Fin Height:
  • CSF: 5mm
  • OEM: 8mm
• Core Thickness:
  • CSF: 16mm (front) + 16mm (back)
  • OEM: 19mm
• Core Material:
  • CSF: Aluminum
  • OEM: Aluminum
• Tank Material:
  • CSF: Aluminum
  • OEM: Aluminum
• Construction:
  • CSF: 100% TIG-welded
  • OEM: Brazed

Applications

• Jeep Gladiator: JT (2020-present) [3.0L V6 EcoDiesel Turbo, 3.6L V6 Pentastar]
• Jeep Wrangler: JL (2018-present) [2.0L I4 Turbo GME T4, 3.0L V6 EcoDiesel Turbo, 3.6L V6 Pentastar]

Notes

• Some images will show the Transmission Oil Cooler installed with the CSF Heavy-Duty Radiator
• Also fits models with Hybrid 2.0L and 3.6L engines

About CSF

The Racing & High Performance Division of CSF Inc. is dedicated to designing and producing the world’s most advanced, efficient, and dependable cooling solutions. CSF offers a broad range of state-of-the-art cooling systems, with over 250 distinct applications. These include high-performance all-aluminum direct-fit radiators, intercoolers, and oil coolers, as well as bespoke manufacturing tailored for racecars, power sports, off-road vehicles, marine, and industrial applications. Every cooling solution from CSF is meticulously crafted to ensure optimal engine temperature management, even in the most rigorous driving scenarios. With a legacy spanning over 50 years and more than 40 million cooling units distributed worldwide, CSF is widely regarded as a luminary in the industry.