{"id":2758,"date":"2026-10-11T14:16:49","date_gmt":"2026-10-11T14:16:49","guid":{"rendered":"https:\/\/www.jlinlin.com\/index.php\/product\/an10-ptfe-transmission-line-for-gm-duramax-01-05-6-6l-lb7-lly-ptfe-inner-tube-with-304-stainless-steel-braid-and-nylon-cover-design-for-extreme-heat-chemical-resistance-durability\/"},"modified":"2026-10-11T14:16:49","modified_gmt":"2026-10-11T14:16:49","slug":"an10-ptfe-transmission-line-for-gm-duramax-01-05-6-6l-lb7-lly-ptfe-inner-tube-with-304-stainless-steel-braid-and-nylon-cover-design-for-extreme-heat-chemical-resistance-durability","status":"publish","type":"product","link":"https:\/\/www.jlinlin.com\/index.php\/product\/an10-ptfe-transmission-line-for-gm-duramax-01-05-6-6l-lb7-lly-ptfe-inner-tube-with-304-stainless-steel-braid-and-nylon-cover-design-for-extreme-heat-chemical-resistance-durability\/","title":{"rendered":"AN10 PTFE Transmission Line for GM Duramax 01-05 6.6L LB7 \/ LLY | PTFE Inner Tube with 304 Stainless Steel Braid and Nylon Cover, Design for Extreme Heat, Chemical Resistance & Durability"},"content":{"rendered":"

Specifications<\/h2>\n<\/p>\n

Transmission Oil Cooler Line Kit Specifications<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Specification<\/strong><\/td>\nDetails<\/strong><\/td>\n<\/tr>\n<\/thead>\n
Brand<\/strong><\/td>\n<\/td>\n<\/tr>\n
Transmission Oil Cooler Kit Contents<\/strong><\/td>\n\n<\/p>\n
    \n
  • 1 \u00d7 59″ AN10 PTFE transmission oil cooler hose (90\u00b0 ends)<\/li>\n
  • 1 \u00d7 47″ AN10 PTFE transmission oil cooler hose (90\u00b0 & 45\u00b0 ends)<\/li>\n
  • 1 \u00d7 39″ AN10 PTFE transmission oil cooler hose (90\u00b0 & straight ends)<\/li>\n
  • 6 \u00d7 10AN to 7\/8″-14 ORB fittings<\/li>\n
  • 2 \u00d7 10AN to 3\/4″-16 ORB fittings<\/li>\n
  • 2 \u00d7 10AN to M22 \u00d7 1.5 fittings<\/li>\n
  • 2 \u00d7 10AN to 1\/2″ NPT fittings<\/li>\n<\/ul>\n<\/td>\n<\/tr>\n
Transmission Oil Cooler Fittings Included<\/strong><\/td>\n6 \u00d7 10AN to 7\/8″-14 ORB \u00b7 2 \u00d7 10AN to 3\/4″-16 ORB \u00b7 2 \u00d7 10AN to M22 \u00d7 1.5 (Setrab style) \u00b7 2 \u00d7 10AN to 1\/2″ NPT<\/td>\n<\/tr>\n
Transmission Oil Cooler Hose Size<\/strong><\/td>\nAN10 (ID: 0.52″ \/ 13.3mm, OD: 0.69″ \/ 17.5mm)<\/td>\n<\/tr>\n
Assembly Required<\/strong><\/td>\nNone \u2014 hose ends pre-installed and pressure tested<\/td>\n<\/tr>\n
Transmission Line Working Pressure<\/strong><\/td>\n1250 PSI<\/td>\n<\/tr>\n
Transmission Line Burst Pressure<\/strong><\/td>\n3750 PSI<\/td>\n<\/tr>\n
Transmission Line Temperature Range<\/strong><\/td>\n-76 \u00b0F to 446 \u00b0F (-60 \u00b0C to 230 \u00b0C)<\/td>\n<\/tr>\n
Transmission Line Min Bend Radius<\/strong><\/td>\n4.5″ (114.3mm)<\/td>\n<\/tr>\n
Transmission Line Material<\/strong><\/td>\nPTFE inner tube + 304 stainless steel braid + braided nylon outer cover<\/td>\n<\/tr>\n
Transmission Line Construction<\/strong><\/td>\n3-layer reinforced design<\/td>\n<\/tr>\n
Transmission Line Compatible Fluid<\/strong><\/td>\n\nPrimary: <\/strong>Transmission fluid, engine oil, hydraulic steering fluid
Additional compatible fluids:<\/strong> E85, racing fuel, diesel (hose material only, not for fuel system assembly)<\/td>\n<\/tr>\n
Compatible Transmissions<\/strong><\/td>\nGM Duramax 6.6L LB7 \/ LLY (2001-2005), Allison 1000<\/td>\n<\/tr>\n
Cooler Compatibility<\/strong><\/td>\nStock radiator cooler, OEM-replacement and aftermarket radiators, auxiliary stacked-plate coolers<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Description<\/h2>\n<\/p>\n

About this item<\/h2>\n

Tired of chasing a leak at the factory crimp? The AN10 PTFE transmission oil cooler line<\/strong> kit replaces the failure-prone OEM lines on 2001-2005 GM Duramax 6.6L LB7\/LLY trucks with three pre-assembled, pressure-tested PTFE hoses and a complete set of transmission oil cooler fittings<\/strong>. Rated to 1250 PSI and 446 \u00b0F, this transmission oil cooler kit<\/strong> is built for high-heat towing and performance builds \u2014 no cutting, no hose assembly, no extra parts to source.<\/p>\n

\" \"What \"3-layer \"10AN \"Transmission<\/p>\n

What is a transmission oil cooler line, and why do the factory ones leak?<\/h3>\n

A transmission oil cooler<\/strong> is the heat exchanger that pulls heat out of automatic transmission fluid before it returns to the gearbox. The factory lines that feed it use a rubber section crimped onto a steel tube \u2014 and on 2001-2005 Duramax trucks that crimp is a known weak point. Heat cycling hardens the rubber, cold weather shrinks it away from the collar, and fluid begins to weep, usually showing up behind the front bumper or along the frame rail. Because the failure is in the crimp itself, replacing like for like just restarts the clock, which is why a full transmission oil cooler hose replacement<\/strong> is the accepted fix on this platform.<\/p>\n

Transmission oil cooler line diagram: how these hoses route<\/h3>\n

The Duramax runs two coolers in series. Fluid leaves the transmission, flows to the cooler built into the radiator end tank, continues to the auxiliary core ahead of the radiator, then returns to the transmission. Each of the three hoses in this kit corresponds to one leg of that loop, with the 90\u00b0, 45\u00b0 and straight ends already oriented for the factory path. Pull up a transmission oil cooler line diagram<\/strong> for your model year before you begin so each hose lands on the correct port. Retain the original transmission oil cooler line clip<\/strong> locations, or add cushioned clamps every 12-18 inches, to keep the hoses clear of the exhaust and steering components.<\/p>\n

Why PTFE + 304 stainless + nylon for an auto transmission oil cooler?<\/h3>\n

Fluid leaving the cooler can run 80-100 \u00b0F hotter than sump temperature, so a hose rated only to 250 \u00b0F is marginal on a truck that tows. The PTFE inner tube is chemically inert, will not swell or absorb ATF, and does not go brittle with heat cycling the way rubber does. The 304 stainless steel braid carries 1250 PSI working and 3750 PSI burst pressure \u2014 ample margin over the 200-260 PSI cold-start spikes an automatic transmission oil cooler<\/strong> circuit produces. The braided nylon outer cover handles abrasion and road debris. Three layers, one job each, working from -76 \u00b0F to 446 \u00b0F.<\/p>\n

Complete transmission oil cooler fittings \u2014 nothing else to buy<\/h3>\n

Most LB7\/LLY trucks use 7\/8″-14 ORB ports, while some early LB7 trucks use 3\/4″-16 ORB. Aftermarket and OEM-replacement radiators often use M22 \u00d7 1.5 Setrab-style ports, and many auxiliary cores use 1\/2″ NPT. All four are included, so this oil cooler for transmission<\/strong> line kit fits a stock truck, a radiator swap, or an added auxiliary cooler without a second order.<\/p>\n

Why Choose the AN10 PTFE Transmission Oil Cooler Kit?<\/h2>\n