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Transmission Line Adapter Fittings

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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!

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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Individual Parts

Results 1 - 25 of 130

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

Part Number: RUS-640520

4.72 out of 5 stars ( 36 )

Estimated Ship Date: Monday 3/16/2026 if shipped by air

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Estimated Ship Date: Monday 3/16/2026 if shipped by air

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

Part Number: RUS-641390

4.86 out of 5 stars ( 21 )

Estimated Ship Date: Monday 3/16/2026 if shipped by air

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Estimated Ship Date: Monday 3/16/2026 if shipped by air

Transmission Line Adapter Fitting Cooler Manifold, Aluminum, Black, Ford, 6R80E, 10R80, Each

Part Number: BTM-2410002

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Monday 3/16/2026 if shipped by air

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Estimated Ship Date: Monday 3/16/2026 if shipped by air

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

Part Number: ICB-551121-6AN

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Monday 3/16/2026 if shipped by air

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Estimated Ship Date: Monday 3/16/2026 if shipped by air

Transmission Cooler Adapter -6AN Male to ¼-18 NPS

Part Number: EAR-940006ERL

4.33 out of 5 stars ( 18 )

Estimated Ship Date: Monday 3/16/2026 if shipped by air

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Estimated Ship Date: Monday 3/16/2026 if shipped by air

Fittings, Transmission Line Adapters, Aluminum, Natural, -6 AN Male Threads, 1/4 in. NPSM Male, O-Rings, Pair

Part Number: ICB-551114

4.4 out of 5 stars ( 35 )

Estimated Ship Date: Monday 3/16/2026 if shipped by air

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Estimated Ship Date: Monday 3/16/2026 if shipped by air

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 )

Estimated Ship Date: Monday 3/16/2026 if shipped by air

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Estimated Ship Date: Monday 3/16/2026 if shipped by air

Fittings, Transmission Line Adapters, Aluminum, Natural, -6 AN Male Threads, 1/4 in. NPS Male Threads, 4L80E, Pair

Part Number: ICB-551124

4.0 out of 5 stars ( 8 )

Estimated Ship Date: Monday 3/16/2026 if shipped by air

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Estimated Ship Date: Monday 3/16/2026 if shipped by air

Transmission Cooler Adapter, Billet Aluminum, Black Anodized, 6AN, 6L80, 6L90, 8L90E, Each

Part Number: EAR-1128ERL

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Monday 3/16/2026 if shipped by air

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Estimated Ship Date: Monday 3/16/2026 if shipped by air

Transmission Line Adapter Fitting, Transmission Cooler Manifold, -6 AN Male Threads, Angled Access Port, Aluminum, Clearcoat, Each

Part Number: BTM-2410003

5.0 out of 5 stars ( 2 )

Estimated Ship Date: Monday 3/16/2026 if shipped by air

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Estimated Ship Date: Monday 3/16/2026 if shipped by air

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 )

Estimated Ship Date: Monday 3/16/2026 if shipped by air

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Estimated Ship Date: Monday 3/16/2026 if shipped by air

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

Part Number: BTM-2410004

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Monday 3/16/2026 if shipped by air

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Estimated Ship Date: Monday 3/16/2026 if shipped by air

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 )

Estimated Ship Date: Monday 3/16/2026 if shipped by air

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Estimated Ship Date: Monday 3/16/2026 if shipped by air

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

Part Number: SOX-22000-01K

5.0 out of 5 stars ( 7 )

Estimated Ship Date: Monday 3/16/2026 if shipped by air

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Estimated Ship Date: Monday 3/16/2026 if shipped by air

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 )

Estimated Ship Date: Monday 3/16/2026 if shipped by air

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Estimated Ship Date: Monday 3/16/2026 if shipped by air

Transmission Line Adapter, Aluminum, Black Anodized, Male 1/4 in. NPS 4L80E, 4L85E, Male -6 AN, Each

Part Number: SUM-220576B

Not Yet Reviewed

Estimated Ship Date: Monday 3/16/2026 if shipped by air

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Estimated Ship Date: Monday 3/16/2026 if shipped by air

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

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Monday 3/16/2026 if shipped by air

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Estimated Ship Date: Monday 3/16/2026 if shipped by air

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 )

Estimated Ship Date: Monday 3/16/2026 if shipped by air

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Estimated Ship Date: Monday 3/16/2026 if shipped by air

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 )

Estimated Ship Date: Monday 3/16/2026 if shipped by air

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Estimated Ship Date: Monday 3/16/2026 if shipped by air

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

Part Number: EAR-1133ERL

Not Yet Reviewed

Estimated Ship Date: Monday 3/16/2026 if shipped by air

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Estimated Ship Date: Monday 3/16/2026 if shipped by air

Transmission Line Adapter Fittings, Billet Aluminum, Natural, 9/16-18 in. Male AN O-ring, -6 AN Male AN, 4L60E, 4L65E, 4L70E, 4L80E, Each

Part Number: ICB-AN799-06A

4.0 out of 5 stars ( 7 )

Estimated Ship Date: Monday 3/16/2026 if shipped by air

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Estimated Ship Date: Monday 3/16/2026 if shipped by air

Fitting, Transmission Line Adapter, Aluminum, Black, Buick, Cadillac, Chevy, Oldsmobile, Pontiac, Isuzu, Each

Part Number: DER-13035

4.2 out of 5 stars ( 5 )

Estimated Ship Date: Monday 3/16/2026 if shipped by air

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Estimated Ship Date: Monday 3/16/2026 if shipped by air

Transmission Cooler Adapter -6AN Male to 1/2-20 in. Male Inverted Flare, Each

Part Number: ADD-23-2001

4.43 out of 5 stars ( 7 )

Estimated Ship Date: Monday 3/16/2026 if shipped by air

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Estimated Ship Date: Monday 3/16/2026 if shipped by air

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 )

Estimated Ship Date: Monday 3/16/2026 if shipped by air

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Estimated Ship Date: Monday 3/16/2026 if shipped by air