Transmission Line Adapter Fittings

Take the hassle out of plumbing your transmission lines with our selection of transmission line adapter fittings. Whether you want to upgrade your OEM lines to aftermarket...

Take the hassle out of plumbing your transmission lines with our selection of transmission line adapter fittings. Whether you want to upgrade your OEM lines to aftermarket stainless steel or add a separate transmission cooler, we’ve got the transmission line adapter fittings to get the job done right. Choose from a huge variety of fitting sizes and attachment styles. We carry adapter fittings from Fragola, Derale, Russell, TCI, Be Cool, Dorman, and more. Find the right transmission line adapter fittings for your project at Summit Racing today!

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Fragola Performance Systems Transmission Line Adapter Fittings 481670-BL

Transmission Line Adapter, Aluminum, Black, Male -6 AN, to Male 1/4 in. NPS, Each

Part Number: FRA-481670-BL

4.62 out of 5 stars ( 13 )

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Summit Racing™ Transmission Line Adapter Fittings SUM-220574B

Transmission Line Adapter, Aluminum, Black Anodized, Male 1/8 in. NPT, Male -6 AN, Each

Part Number: SUM-220574B

5.0 out of 5 stars ( 2 )

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Summit Racing™ Transmission Line Adapter Fittings SUM-220571B

Transmission Line Adapter, Aluminum, Black Anodized, Male 1/4 in. NPS, Male -6 AN, Each

Part Number: SUM-220571B

1.0 out of 5 stars ( 1 )

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Russell Transmission Cooler Line Fittings 641390

Fittings, Transmission Cooler Lines to Case, -6 AN to 1/4 in. 4L80E, 4L85E, Straight Thread, Black Anodized, Pair

Part Number: RUS-641390

4.85 out of 5 stars ( 20 )

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Sonnax Cooler Line Repair Kits 22000-01K

Transmission Line Adapter Fittings, Cooler Line Repair, Chrysler, Kit

Part Number: SOX-22000-01K

5.0 out of 5 stars ( 7 )

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Summit Racing™ Transmission Line Adapter Fittings SUM-220027

Transmission Line Adapters, Aluminum, Black, Male -6 AN to 1/4 in.-18 NPSM, Pair

Part Number: SUM-220027

4.03 out of 5 stars ( 29 )

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ICT Billet Transmission Line Adapters AN710-06A

ICT Billet Transmission Line Adapters AN710-06A

Transmission Line Adapter Fittings, Billet Aluminum, Natural, 1/4 in. NPS Male Threads, -6 AN Male AN, 4L60E, AOD, C5, TH350, TH400, Each

Part Number: ICB-AN710-06A

Not Yet Reviewed

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TCI Transmission Cooler Line Fittings 831013

Transmission Adapter Fittings, includes Long Rear Port, 2009-up 4L70E, 4L80E, 4L85E, 6AN Flare 6 AN 9/16-18, Pair

Part Number: TCI-831013

5.0 out of 5 stars ( 1 )

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Summit Racing™ Transmission Line Adapter Fittings SUM-220572B

Transmission Line Adapter, Aluminum, Black Anodized, Male 1/8 in. NPS, Male -6 AN, Each

Part Number: SUM-220572B

4.88 out of 5 stars ( 8 )

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Fragola Performance Systems Transmission Line Adapter Fittings 481671-BL

Transmission Line Adapter, Aluminum, Black, Male -6 AN, to Male 1/8 in. NPS, Each

Part Number: FRA-481671-BL

4.73 out of 5 stars ( 11 )

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ICT Billet Transmission Line Adapters 551121-8AN

Transmission Line Adatper Fittings, Male AN O-Ring, -6 AN, Male AN, -8 AN, Aluminum, Natural, 6L80E, 6L90E, 8L90E, Each

Part Number: ICB-551121-8AN

5.0 out of 5 stars ( 1 )

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Russell Transmission Cooler Line Fittings 641400

Fittings, Transmission Cooler Lines to Case, -8 AN to 1/4 in. 4L80E, 4L85E, Straight Thread, Black Anodized, Pair

Part Number: RUS-641400

5.0 out of 5 stars ( 1 )

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Summit Racing™ Transmission Line Adapter Fittings SUM-220573B

Transmission Line Adapter, Aluminum, Black Anodized, Male 1/2-20 in., Male -6 AN, Each

Part Number: SUM-220573B

Not Yet Reviewed

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Scott Drake Transmission Oil Cooler Fittings for 1967-1973 MUSTANG - MOCF01

Transmission Oil Cooler Fittings, Brass, Natural, Ford, Pair

Part Number: SDK-MOCF01

5.0 out of 5 stars ( 5 )

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ATI Transmission Cooler Line Fittings ATI925137

Fitting, Transmission Line into Case Adapter, -6 AN Male to 1/4 in. NPSM Male, Aluminum, Black Anodized, Pair

Part Number: ATI-925137

5.0 out of 5 stars ( 6 )

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S.U.R.&R. Transmission Oil Cooler Line Adapters SRRTR975

Transmission Line Adapters, 90 Degree, 3/8 in. Line, GM Quick Connect to Hose Barb, Steel, Pair

Part Number: URR-TR975

5.0 out of 5 stars ( 2 )

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Dorman Transmission Line Connectors 800-606

Fitting, Transmission Cooler Line Connector, Steel, 3/8 NPT Male Threads, Quick-connect, Cadillac, Chevy, GMC

Part Number: RNB-800-606

Not Yet Reviewed

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Dorman Transmission Line Connectors 800-753

Fitting, Transmission Line Adapter, 1/4 in. NPS to 1/2-20 in. Inverted Flare, Each

Part Number: RNB-800-753

4.0 out of 5 stars ( 1 )

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Bowler Performance Transmissions Transmission Line Adapter Fittings 2410140

Transmission Cooler Manifold, FORD 10R140, With -8AN Fittings

Part Number: BTM-2410140

Not Yet Reviewed

Estimated Ship Date: Nov 3, 2025 if ordered today

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Estimated Ship Date: Nov 3, 2025 if ordered today

Earl's Performance Transmission Cooler Line Adapters 1133ERL

Transmission Cooler Adapter, Billet Aluminum, Black Anodized, -6AN, 6L80, 6L80E, 6L90, 6L90E, Each

Part Number: EAR-1133ERL

Not Yet Reviewed

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Redhorse Performance 8248 Series Tee Adapter Fittings 8262-480-2

Transmission Line Adapter, Aluminum, Black Anodized, Male -6 AN, to Male 1/4 in. NPS, Pair

Part Number: HSE-8262-480-2

Not Yet Reviewed

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ATI Transmission Cooler Line Fittings ATI960002

Fitting, Adapter, 1/4 in. NPT Male, -6 AN Male, Aluminum, Blue Anodized, Superglide, Each

Part Number: ATI-960002

Not Yet Reviewed

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ATI Transmission Cooler Line Fittings ATI925143

Fitting, Transmission Line into Case Adapter, -6 AN Male to 9/16 in.-18 Male, Aluminum, Black Anodized, Each

Part Number: ATI-925143

Not Yet Reviewed

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Hayden Transmission Line Adapter Fittings 397

Transmission Line Adapter, Brass, Snap-In, Each

Part Number: HDA-397

4.78 out of 5 stars ( 18 )

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Dorman Transmission Line Connectors 800-617

Oil Cooler Connector, Steel, Zinc Chromate Finish, Ford, Mercury, Each

Part Number: RNB-800-617

Not Yet Reviewed

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TCI Transmission Cooler Line Fittings 831011

Transmission Line Adapter Fittings, 1/4 in. 4L80E to -6 AN, 4L80E, 4L85E, 1997 -2008, Pair

Part Number: TCI-831011

3.5 out of 5 stars ( 8 )

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