Fleece Performance FPE-TL-CUMM-1012 — 2010-2012 6.7L Cummins 68RFE Replacement Transmission Line Kit

Stop the leaks. Restore reliable transmission pressure and performance.

Factory transmission cooler lines on 2010–2012 Ram 2500/3500 trucks with the 6.7L Cummins and 68RFE transmission are a well-known weak point. Over time, vibration, heat cycling, and age cause them to crack, leak, or fail — leading to low fluid pressure, poor shifting, and the risk of being stranded.

The Fleece Performance FPE-TL-CUMM-1012 Transmission Line Kit replaces those problematic factory lines with heavy-duty, high-flow, flexible lines engineered for superior durability and performance. This complete kit gives you everything needed for a clean, leak-free installation and long-term reliability, whether you're towing heavy loads or daily driving.

Key Features & Benefits

• Heavy-duty, high-flow flexible lines — Built tougher than rigid factory lines to resist vibration, flex with engine movement, and eliminate common leak points.
• Improved fluid flow & cooling — High-flow design maintains proper transmission fluid circulation and helps support lower operating temperatures.
• Complete kit solution — Includes all necessary fittings, clamps, and hardware so you can do the job right the first time without hunting for parts.
• Direct-fit replacement — Designed specifically for 2010–2012 6.7L Cummins with 68RFE; no cutting or splicing required in most cases.
• Compatible with Fleece upgrades — Works seamlessly with Fleece Performance Dual Pump Kits and other fuel system modifications.
• Better long-term reliability — Helps prevent pressure loss and extends the life of your 68RFE transmission under demanding conditions.

What's Included

• High-flow transmission cooler supply and return lines
• (4) -8AN to 3/4"-16 fittings
• (1) 11/16” P-Clamp
• (1) 1-3/4” P-Clamp
• (4) Double hose zip ties

Vehicle Fitment

• 2010–2012 Dodge/Ram 2500 & 3500 with 6.7L Cummins and 68RFE automatic transmission

Important Notes:

• Trucks equipped with the factory transmission heat exchanger (coolant-to-fluid unit on the driver’s side of the engine) will require an additional heater tube (Chrysler PN: 68048997AA). Fleece also offers a heat exchanger plug & cap kit (FPE-34382) for bypass applications.
• This kit replaces the lines running to the front-mounted auxiliary transmission cooler.

Why Choose Fleece Performance?

Fleece Performance is a trusted name in the Cummins community for well-engineered, high-quality components. This transmission line kit is a straightforward, effective upgrade that addresses one of the most common failure points on these trucks.

Warranty: 1-Year Limited Parts Warranty

SKU: FPE-TL-CUMM-1012

This is the ideal fix if you're dealing with leaking lines, planning a transmission service, or simply want to upgrade to a more robust solution before problems start. Pair it with a transmission fluid and filter service for maximum protection.