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Transmission Cooler Lines

Keep your automatic transmission running cool and reliable with high-quality transmission cooler lines. Whether you’re replacing worn factory lines or upgrading for...

Keep your automatic transmission running cool and reliable with high-quality transmission cooler lines. Whether you’re replacing worn factory lines or upgrading for better flow and durability, the right cooler lines help prevent overheating, fluid breakdown, and costly transmission damage.

Available from brands like Classic Tube, Dorman, Sunsong, The Right Stuff, and more, our selection includes flexible transmission cooler lines, braided transmission cooler lines, and pre-bent transmission cooler lines designed for most popular transmissions. These lines deliver consistent fluid circulation between the transmission and...

Keep your automatic transmission running cool and reliable with high-quality transmission cooler lines. Whether you’re replacing worn factory lines or upgrading for better flow and durability, the right cooler lines help prevent overheating, fluid breakdown, and costly transmission damage.

Available from brands like Classic Tube, Dorman, Sunsong, The Right Stuff, and more, our selection includes flexible transmission cooler lines, braided transmission cooler lines, and pre-bent transmission cooler lines designed for most popular transmissions. These lines deliver consistent fluid circulation between the transmission and cooler for optimal temperature control under daily driving, towing, or performance use.

Flexible Transmission Cooler Lines

Flexible transmission cooler lines offer easy routing and installation in tight engine bays. Made from durable materials that resist heat, abrasion, and pressure, they provide a reliable, leak-resistant connection while allowing for engine movement and vibration.

Braided Transmission Cooler Lines

For maximum strength and protection, braided transmission cooler lines feature a tough outer braid (typically made from stainless steel or nylon) that guards against abrasion, heat, and external damage. These lines are ideal for high-performance builds, heavy-duty applications, or vehicles that see extreme conditions.

Individual Parts

Results 1 - 25 of 2000 +

Automatic Transmission Cooler Lines, 5 Foot Length, Flexible, Braided Stainless Steel, PTFE, 4L60, 700R4, TH350, TH400, Pair

Part Number: SUM-230322

4.28 out of 5 stars ( 29 )

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Automatic Transmission Cooler Lines, 7 Ft. Length, Flexible, Braided Stainless Steel, PTFE, 4L60, 700R4, TH350, TH400, Pair

Part Number: SUM-230320

4.68 out of 5 stars ( 19 )

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Automatic Transmission Cooler Lines, Flexible, Stainless Steel, 700R4, TH350, TH400, Pair

Part Number: ADD-23-1501-60

4.72 out of 5 stars ( 32 )

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Transmission Cooler Lines, -6 AN, 1/4 in. NPSM, Hose Ends, Kit

Part Number: FTI-F12001

4.5 out of 5 stars ( 4 )

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Automatic Transmission Cooler Lines, 5 Foot Length, Flexible, Braided Stainless Steel, PTFE, 700R4, TH350, TH400, Pair

Part Number: SUM-230323

4.73 out of 5 stars ( 11 )

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Automatic Transmission Cooler Lines, 7 Ft. Length, Black, Braided Nylon, PTFE, 4L60, 700R4, TH350, TH400, Pair

Part Number: SUM-230320-BN

Not Yet Reviewed

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Automatic Transmission Cooler Lines, Rubber, Chevy, GMC, 6.6L Diesel, Allison 1000, Kit

Part Number: FLE-FPETLLBZLMM

3.25 out of 5 stars ( 8 )

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Automatic Transmission Cooler Lines, 5 Foot Length, Black, Braided Nylon, PTFE, 4L60, 700R4, TH350, TH400, Pair

Part Number: SUM-230322-BN

4.0 out of 5 stars ( 1 )

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Automatic Transmission Cooler Lines, Flexible, Stainless Steel, 700R4, TH350, TH400, Pair

Part Number: ADD-23-1501

4.6 out of 5 stars ( 239 )

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Automatic Transmission Cooler Lines, 5 Foot Length, Flexible, Braided Stainless Steel, Black, PTFE, 4L60, 700R4, TH350, TH400, Pair

Part Number: SUM-230322-B

4.17 out of 5 stars ( 6 )

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Fluid Cooler Lines, Transmission Cooler Lines, Rubber, Chevy, GMC, Kit

Part Number: FLE-FPETLLB7LLY

4.0 out of 5 stars ( 2 )

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Fluid Cooler Lines, Automatic Transmission Cooler Lines, Steel/Rubber, 6L80-E, Cadillac, Chevrolet, GMC, Each

Part Number: ADO-85585332

5.0 out of 5 stars ( 4 )

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Automatic Transmission Cooler Lines, Stainless Steel, Jeep, 32RH, Kit

Part Number: FNL-WTC9709SS

3.0 out of 5 stars ( 1 )

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Fluid Cooler Lines, Automatic Transmission Oil, 1/2 in.-20 Threaded Fittings, OE Steel, Chevy, GMC, L6, V8, Sold as a Set

Part Number: RSD-TTC7503

2.92 out of 5 stars ( 12 )

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Automatic Transmission Cooler Lines, 5 Foot Length, Flexible, Braided Stainless Steel, Black, PTFE, 700R4, TH350, TH400, Pair

Part Number: SUM-230323-B

3.0 out of 5 stars ( 2 )

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Tube, Trans/Oil Cooler, Steel, Natural, Dodge, Truck, Each

Part Number: MOP-52028732AC

3.0 out of 5 stars ( 6 )

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Transmission Lines, Automatic, Universal, 5/16 in. Inverted Flare 1/2-20 Thread, Kit

Part Number: SUM-338045

4.2 out of 5 stars ( 55 )

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Transmission Cooler Lines, Stainless Steel, Ford, Lower, Upper, Kit

Part Number: GOS-231104

4.0 out of 5 stars ( 1 )

Estimated Ship Date: Nov 16, 2026 if shipped by air

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Estimated Ship Date: Nov 16, 2026 if shipped by air

Fluid Cooler Lines, Pre-Bent OE Style, for THM350/TH350 Transmission, Steel, Chevy, L6, Small Block, Big Block, Set

Part Number: RSD-FTC6703

4.5 out of 5 stars ( 4 )

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Automatic Transmission Cooler Lines, Flexible, Stainless Steel, 4L60, 700R4, TH350, TH400, Pair

Part Number: ADD-23-1500

4.37 out of 5 stars ( 94 )

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Fluid Cooler Lines, Automatic Transmission Cooler Lines, Supply and Return, Steel/Rubber, 42RLE, Dodge, Jeep, Pair

Part Number: CWA-55037841AK

1.0 out of 5 stars ( 1 )

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Automatic Transmission Cooler Lines, Steel, Set

Part Number: RSD-TTC6803

4.41 out of 5 stars ( 17 )

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Automatic Transmission Cooler Line, Steel, Chrysler, Dodge, Plymouth, Torqueflite 727, Set

Part Number: RSD-RTC6602

4.58 out of 5 stars ( 26 )

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Automatic Transmission Cooler Line, Each

Part Number: ADO-25999420

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Dec 8, 2026

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Estimated Ship Date: Dec 8, 2026