Best General Motors Automotive Replacement Transmission Cooling Lines in 2026

GM-recommended replacement part for your GM vehicle’s original factory component

Offering the quality, reliability, and durability of GM OE

Manufactured to GM OE specification for fit, form, and function

Fits for: GM 1996 and Later Snap-in Style Lines

Material: Made of high quality brass, durable in use

Part Number: OC-397/397/OC397

Size is 3/4 inch x 7-1/2 inch x 12-1/2 inch

Mid-size and full-size cars, pick-ups

GVWR up to 18,000 pounds, towing up to 3,500 pounds

Direct replacement - this automatic transmission oil cooler hose assembly is designed to match the fit and function of the original equipment assembly on specified vehicle makes, models and years

Ideal solution - engineered to help ensure proper transmission cooling when the original assembly is leaking or has failed from corrosion, collision, vibration, or fitting damage

Durable construction - made of quality materials for reliable performance and long service life

Quality replacement - this transmission cooler connector matches the fit and function of the original equipment connector

Durable construction - this oil cooler line connector is made of quality materials for a precise fit and leak-free durability

Performance tested - this connector has been rigorously pressure tested to ensure reliable performance

🚗Replace Number - Transmission cooler hose fitting replace number is TH350 700R4 TH400.

🚗Package Include - AN6 flared to 1/4" NPT billet adaptors, fits most 700R4, TH350, TH400; Please check fitting size prior to ordering (Some are 1/4" and others 3/8");AN-6 flared to 3/8" NPT billet adaptors;90 degree AN-6 inverted flare to AN-6 flare billet adaptors; lines in the kit, and each line is about 52".

🚗Compatible with -The universal kit is perfect for your Rat Rod, Hot Rod, Street Rod, Muscle Car, Custom and more;Works with lots of Chevy, Ford, Mopar, GM, GMC, Buick, Cadillac cars & trucks

2006-2010 GM 6.6L LBZ/LMM Duramax Diesel (w/ Allison Transmission ONLY)

Includes All Fittings/Hardware

Transmission Lines

Replaces 2006-2010 Chevy,GMC 6.6L Duramax Transmission Lines. Includes (3) lines and all necessary fittings, zip ties, and easy to follow instructions.

1/2" ID 5,250 PSI DOUBLE Steel Braided w/abrasion resistant exterior (3X the protection to prevent against rub through or road hazards) - High Quality, crimped on, zinc plated (1) piece steel (not aluminum!) hose ends.

Designed and built in USA by CR Performance, a trusted USA manufacturer of the Duramax Transmission lines. We use quality hose and fittings and build for quality, not the cheapest price.

GM-recommended replacement part for your GM vehicle’s original factory component

Offering the quality, reliability, and durability of GM OE

Manufactured to GM OE specification for fit, form, and function

The outside of the hose is made of flexible stainless steel, and the inside of the hose is made of high temperature resistant, anti-freeze cracking and explosion-proof PVC material.

After verification, hose compatible with Turbo 350 (Some are 1/4" NPT), Turbo 400,Turbo 200 - 200R4, Power Glide (Some are 1/4" NPT), 700R4 - 4L60 - 4L60E - 4L65E, 4L80E: 1995 & older, Ford C4 - C6 - AOD

Package include two about 52 inch & 3/8" I.D. Stainless Steel Braided Hoses;four AN-6 flared to 1/4" NPT billet adaptors, fits most 700R4, TH350, TH400; two AN-6 flared to 3/8" NPT billet adaptors; two 90 degree AN-6 inverted flare to AN-6 flare billet adaptors.Please check pictures for more details.

Fitment: For Turbo 350 400, Turbo 200 -200R4 power glide(some are 1/4" NPT) 700R4 - 4L60 - 4L60E - 4L65E - 4L80E 1996 & Newer Ford C4 C6 - AOD

Material: Made of stainless steel flexible braided transmission hose, reliability and stability, Easy to install

Package Included: 2 x about 70 inch & 3/8" I.D. Stainless Steel Braided Hoses; 4 x AN-6 flared to 1/4" NPT billet adaptors; 2 x AN-6 flared to 3/8" NPT billet adaptors; 4 x 90 degree AN-6 inverted flare to AN-6 flare billet adaptors;2 x Aluminum 4L80E adapter fittings

Fleece Performance Engineering FPE-TL-LB7-LLY Transmission Cooler Line (01-05 Compatible with/Replacement for GM Duramax 6.6L LB7 / LLY Allison)

Fitment - Transmission cooler hose fitting fit for Chevy Ford Mopar GM GMC Buick Cadillac Cars and Trucks.Universal kit for rat rod, hot rod, street rod, muscle car, custom and others.

Replace Number - Transmission cooler hose fitting replace number is 700R4, TH350, TH400, NP-700RTL.

Compatible with - for Turbo 350 (Some are 1/4" NPT), for Turbo 400, for Turbo 200 - 200R4, for Power Glide (Some are 1/4" NPT), for 700R4 - 4L60 - 4L60E - 4L65E, for 4L80E: 1995 & older, for Ford C4 - C6 - AOD.

GM-recommended replacement part for your GM vehicle’s original factory component

Offering the quality, reliability, and durability of GM OE

Manufactured to GM OE specification for fit, form, and function

Used to connect clear tubing to the transmission cooler in order to flush the transmission and works perfectly for GM vehicles

For GM 1996 and later Snap-in Style Push or Clip Oil Lines

Connection Fitting Size: 3/8"

Compatible with：Chevy, Ford, Mopar, GM, GMC, Buick, Cadillac cars & trucks.

Braided Lines : Suitable for single- and dual-channel coolers ; end with AN-6 inverted torch.

Includes: 52 inch and 3/8" internal diameter Stainless steel braided hoses, 1/4 "NPT adapter , 3/8" NPT adaptors ，90 degree adapter.

[Parameter] Thread size: 6AN Flare to 1/4" NPSM, OD: 0.516".

[Transmissions] Compatible with TH350 TH400 4L60E 700R4 200-4R TR6060 transmissions.Compatible with Ford AOD 4R100 4R70W C5 transmissions.

[Application] The transmission adapter fitting designed for the front and rear transmission line ports, up to 2007 (not For 1996 and up 4L80E rear).

Stainless steel flexible braided transmission hoses/ lines fit single and dual pass coolers

The universal kit is perfect for your Rat Rod, Hot Rod, Street Rod, Muscle Car, Custom and more

Works with lots of Chevy, Ford, Mopar, GM, GMC, Buick, Cadillac cars & trucks

Package includes: 2 X 7Ft AN6 PTFE Hose with Straight Fittings, 2 X AN6 Male Flare to 1/2 x 20 Male Thread Inverted, 2 X AN6-1/4 NPT 90 Degree

Transmission Cooler Hose is made of black nylon and the connectors are made from high performance lightweight 6061-T6 cnc machined billet aluminum, black anodized finish for long last, durability and strength

7Ft PTFE hose is suitable for various transmissions, replace 4L60/700R4/TH350/TH400. The black anodized connector is not only more beautiful, but also the aluminum material makes heat dissipation better than others

【Compatible With】：Applicable to 700R4/ TH350/ TH400/ NP-700RTL,compatible with Chevy Ford Mopar GM GMC Buick Cadillac Cars and Trucks.

【Function】：Improving the cooling efficiency of the vehicle's gearbox helps to avoid heat related faults and thus extends the service life of the equipment.

【52" 6AN Transmission Cooler Lines Kit Includes】：Two stainless steel braided hoses with an inner diameter of about 52 inches and 3 / 8 inches; Four an-6 flared to 1 / 4 "NPT billet adapters for most 700r4, th350, TH400; two an-6 flared to 3 / 8" NPT billet adapters; Two 90 degree an-6 reverse flared to an-6 flared billet adapters.

PACKAGE INCLUDE - 2 x 52 inch 3/8 I.D. Stainless Steel Braided Hoses; 4 x AN-6 flared to 1/4 In NPT billet adaptors; 2 x AN-6 flared to 3/8 In NPT billet adaptors; 2 x 90-degree AN-6 inverted flare to AN-6 flare billet adaptors.

COMPATIBILITY - MuHize 52 inch transmission cooler hose fits for TH350 700R4 TH400 coolers of Chevy Ford Mopar GM GMC Buick Cadillac Cars and Trucks.

DURABILITY - This transmission cooling line kit is made of high-strength PTFE(Teflon), which is resistant to high & low temperatures and is anti-corrosion. The precision braided stainless steel on the outside of the hose greatly increases the strength of the tube.

GM-recommended replacement part for your GM vehicle’s original factory component

Offering the quality, reliability, and durability of GM OE

Manufactured to GM OE specification for fit, form, and function

Aluminum Alloy Fitment: For 4L60, 700R4, TH350TH400, CBC350 3L80 Perfect match for the original one. 7Ft PTFE hose is suitable for various transmissions cooler

Compatible with Chevy Cadillac GMC: Compatible with 1982-1991Blazer; Compatible with 1982-1992 Caprice, Corvette, 1982-1993 Jimmy; Compatible with 1983-1990 Safari Van and more

Material: High quality with 3-layer hose. Outer Nylon braided, Middle: Stainless Steel, Inner: PTFE hose which which is working temperature range: -76°F to 446°F (-60°C to 230°C). Max working pressure: 3000psi. Bursting pressure: 10000psi

🏎️Product Details: 70" Transmission Cooler Hoses for Specific Vehicles.

🏎️Fit for Turbo 200/200R4/350/400/700R4 Power Glide (Some are 1/4" NPT) & 4L60 4L60E 4L65E 4L80E

🏎️Compatible with Ford C4 C6 AOD & 1996+ GM Chevy Buick Cadillac Vehicles

GM-recommended replacement part for your GM vehicle’s original factory component

Offering the quality, reliability, and durability of GM OE

Manufactured to GM OE specification for fit, form, and function

The Galaxy Auto Allison transmission cooler lines fix the old leaky transmission lines in your 2001-2005 GM 6.6L Duramax LB7 & LLY. These heavy-duty, high-flow, flexible transmission lines are just what you need for trouble-free performance from your Allison Transmission.

Kit Includes: Transmission Lines | Concave Washers | Includes All Fittings/Hardware

Note: In most cases, trucks with aftermarket radiators will require the purchase of aftermarket fittings for installation. Due to the many possible combinations, fitment is not guaranteed on non-stock components.

【Vehicle Fitment】Compatible with Chrysler Town & Country 2008-2010 V6 3.3L, Voyager 2008-2008 V6 3.3L; Compatible with Dodge Grand Caravan 2008-2010 V6 3.3L---Pressure and Return Side

【Reference Number】The A-Premium automatic transmission oil cooler line's reference number: 5005203AA, 5005203AC, 624-610, 624610. Before placing an order, verify that the part is compatible with your vehicle using the compatibility system.

【Durable Construction】This oil cooler line is made of durable, corrosion-resistant material for reliable, leak-free performance

Package includes: 2 x 90 degree oil cooler

Fits for 4L80E GM transmission cooler BANJO fittings 1997 to Mid 2010.

Outer Diameter of Thread: approx. 0.521in/13.3mm

[COMPATIBLE WITH] Compatible with 2006-2010 Chevy GMC 2500 & 3500 applications with the 6.6L LLY LBZ & LMM Duramax diesel engine.

[LONG LIFE-SPAN] Long life-span matters, that is why our Transmission Cooler Lines Hoses is crafted from double steel braided w/abrasion resistant exterior to prevents expansion under high pressure and protects lines against abrasion.

[HIGH TEMPERATURE RESISTANCE] The transmission of the driving vehicle will get warmer, and the temperature will be very high, our Transmission Cooler Lines Hoses with strong resistance to high temperature.

Fitment: fits for Dodge Ram 2500 3500 5.9L with 47RE transmission 1996 1997 1998 1999 2000 2001 2002 This may be an excellent solution for damage to the original parts. Our products can provide you with an experience comparable to the original parts!

Strict quality inspection: the products are manufactured, enter the warehouse and dispatch orders, they are all inspected by dedicated personnel. The three real-person inspections ensure that the products are foolproof and provide you with a good experience!

Saving money: Replacing the original parts often requires going to a professional car repair shop, which will cost you a huge amount of money and waste your precious time. With our products, you no longer need to go to a professional car repair shop to pay expensive Price, only need to spend a small amount of money, you can solve your problem