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Piston and Piston Kits For Automatic Transmissions

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Piston Kit AW80-40LE AW80-40LS AW81-40LE U440E, U441E
$245.06 - $245.06
$245.06
$245.06 - $245.06
$245.06

Piston Kit AW80-40LE AW80-40LS AW81-40LE U440E U441E

Only 1 left!

Piston Kit AW80-40LE AW80-40LS AW81-40LE U440E, U441E Transmissions: U441E (AW81-40LE,AW80-40LE,U440E) 1999-2008 Vehicle BUICKEXCELLE/EXCELLE HRV ...

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$245.06 - $245.06
$245.06
$245.06 - $245.06
$245.06
$226.66 - $226.66
$226.66
$226.66 - $226.66
$226.66

Piston Kit 1st Gen 6T40 2008/12

Only 1 left!

Piston Kit 1st Gen 6T40 2008/12  Contains 5 Pistons.Transmissions: 6T40 (6T40E,X23F) 2008-2012 Vehicle BUICKALPHEON 2012 6 SP FWD L4 2.4LENCORE 20...

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$226.66 - $226.66
$226.66
$226.66 - $226.66
$226.66
Piston Kit Gen 2 Transtec 6T35 6T40 6T45 2012/UP Sold Out
$219.91 - $219.91
$219.91
$219.91 - $219.91
$219.91

Piston Kit Gen 2 Transtec 6T35 6T40 6T45 2012/UP

Out of stock

Piston Kit Gen 2 Transtec 6T35 6T40 6T45 2012/UP Transmissions: 6T45 (6T45E,MH7) 2012-UP, 6T40 (6T40E,X23F) 2012-UP, 6T35 2012-UP Vehicle BUICKALP...

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$219.91 - $219.91
$219.91
$219.91 - $219.91
$219.91
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Piston Kit Transtec 3ra Gen GMC 2014/UP 6T40 6T45
$215.86 - $215.86
$215.86
$215.86 - $215.86
$215.86

Piston Kit Transtec 3rd GEN GMC 2014/UP 6T40 6T45

Only 1 left!

Piston Kit Transtec 3ra Gen GMC 2014/UP 6T40 6T45 Transmissions: 6T40 (6T40E,X23F) 2014-UP Vehicle BUICKALPHEON 2014-2015 6 SP FWD L4 2.4LCASCADA ...

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$215.86 - $215.86
$215.86
$215.86 - $215.86
$215.86
Piston Kit (4) TF-81SC TF-80SC AF21 AW6AX-EL AF21B AW6AX-E AW6A-EL MXE AM6 AF40-6 AF40
$158.57 - $158.57
$158.57
$158.57 - $158.57
$158.57

Piston Kit TF-81SC TF-80SC AF21 AW6AX-EL AF21B AW6AX-E AW6A-EL MXE AM6 AF40-6 AF40

Only 1 left!

Piston Kit (4) TF-81SC TF-80SC AF21 AW6AX-EL AF21B AW6AX-E AW6A-EL MXE AM6 AF40-6 AF40 Transmissions: TF-81SC (AF21,AW6AX-EL,AF21B,AW6AX-E) 2005-2...

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$158.57 - $158.57
$158.57
$158.57 - $158.57
$158.57
Piston Kit (5) 6F50 6F55 6T70 6T75 2007/12
$149.97 - $149.97
$149.97
$149.97 - $149.97
$149.97

Piston Kit 6F50 6F55 6T70 6T75 2007/12

in stock

Piston Kit 6F50 6F55 6T70 6T75 2007/12 Transmissions: 6T75 2007-2012, 6F55 2007-2012, 6F50 2007-2012, 6T70 (MH4,MH2) 2007-2012 Vehicle BUICKENCLAV...

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$149.97 - $149.97
$149.97
$149.97 - $149.97
$149.97
Piston Kit 2WD 4L40E 5L40E 5L50E MX5 M82 MV3 M22
$147.21 - $147.21
$147.21
$147.21 - $147.21
$147.21

Piston Kit 2WD 4L40E 5L40E 5L50E MX5 M82 MV3 M22

in stock

Piston Kit 2WD 4L40E 5L40E 5L50E MX5 M82 MV3 M22 Transmissions: 4L40E 1999-UP, 5L40E (MX5,M82) 1999-UP, 5L50E (MV3,M22) 1999-UP Vehicle BMW3-SERIE...

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$147.21 - $147.21
$147.21
$147.21 - $147.21
$147.21
Piston Kit Transtec 9T45 9T50 9T60 9T65 2017/UP
$129.58 - $129.58
$129.58
$129.58 - $129.58
$129.58

Piston Kit Transtec 9T45 9T50 9T60 9T65 2017/UP

in stock

Piston Kit Transtec 9T45 9T50 9T60 9T65 2017/UP Transmissions: 9T50 (9T65,9T60,9T45) 2017-UPVehicleBUICKEnclave, Regal Sportback 2018-2020 9 SPD F...

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$129.58 - $129.58
$129.58
$129.58 - $129.58
$129.58
Piston Kit Transtec (4) TF-81SC TF-80SC AF21 AF40 AW6A-EL MXE AM6 AW6AX-EL AW6AX-E 2005/11
Sold Out
$124.38 - $124.38
$124.38
$124.38 - $124.38
$124.38

Piston Kit Transtec TF-81SC TF-80SC AF21 AF40 AW6A-EL MXE AM6 AW6AX-EL AW6AX-E 2005/11

Out of stock

Piston Kit Transtec (4) TF-81SC TF-80SC AF21 AF40 AW6A-EL MXE AM6 AW6AX-EL AW6AX-E 2005/11 Transmissions: TF-80SC (AW6A-EL,MXE,AM6,AF40-6,AF40,TF8...

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$124.38 - $124.38
$124.38
$124.38 - $124.38
$124.38
Sold Out
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$118.07 - $118.07
$118.07
$118.07 - $118.07
$118.07

Piston Kit Hi-Per Blue 1st And 2nd Generation 6T30 MH9

in stock

Piston Kit (5) Hi-Per Blue 1st And 2nd Generation 6T30 MH9 Piston Kit has 5 Pistons Hi-Per Blue.Transmissions: 6T30 (MH9) 2008-2018 Vehicle BUICKE...

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$118.07 - $118.07
$118.07
$118.07 - $118.07
$118.07
$90.27 - $90.27
$90.27
$90.27 - $90.27
$90.27

Piston Kit (3) 9T45 9T50 9T60 9T65 2017/UP

in stock

Piston Kit (3) 9T45 9T50 9T60 9T65 2017/UP Transmissions: 9T50 (9T65,9T60,9T45) 2017-UP Vehicle BUICKRegal Sportback 2018-2020 9 SPD FWDEnvision 2...

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$90.27 - $90.27
$90.27
$90.27 - $90.27
$90.27
Piston Kit (2) AW80-40LE AW80-40LS AW81-40LE U440E U441E
$52.78 - $52.78
$52.78
$52.78 - $52.78
$52.78

Piston Kit AW80-40LE AW80-40LS AW81-40LE U440E U441E

in stock

Piston Kit (2) AW80-40LE AW80-40LS AW81-40LE U440E U441E Without Reverse Piston with Forward DrumTransmissions: U441E (AW81-40LE,AW80-40LE,U440E) ...

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$52.78 - $52.78
$52.78
$52.78 - $52.78
$52.78
Pinless Accumulator Piston 1-2 & 3-4 Kit Sonnax TH700-R4 4L60E 4L65E 4L70E TH200-4R
$18.03 - $18.03
$18.03
$18.03 - $18.03
$18.03

Pinless Accumulator Piston 1-2 & 3-4 Kit Sonnax TH700-R4 4L60E 4L65E 4L70E TH200-4R

in stock

Pinless Accumulator Piston 1-2 & 3-4 Kit Sonnax TH700-R4 4L60E 4L65E 4L70E TH200-4R Upgrade your transmission with the Sonnax Pinless Accumulat...

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$18.03 - $18.03
$18.03
$18.03 - $18.03
$18.03
Piston Molded Overrun Clutch 4L30E ML4
$8.00 - $8.00
$8.00
$8.00 - $8.00
$8.00

Piston Molded Overrun Clutch 4L30E ML4

Only 1 left!

Piston Molded Overrun Clutch 4L30E ML4 Transmissions: 4L30E (ML4) 1989-UP OEM Number: 8-96014-577-0  Vehicle ACURASLX 1996-1999 4 SP RWD V6 3.2L 3...

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$8.00 - $8.00
$8.00
$8.00 - $8.00
$8.00
Cover Molded Piston 3rd-4th Accumulator 4L30E ML4
$3.07 - $3.07
$3.07
$3.07 - $3.07
$3.07

Cover Molded Piston 3rd-4th Accumulator 4L30E ML4

in stock

Cover Molded Piston 3rd-4th Accumulator 4L30E ML4 Transmissions: 4L30E (ML4) 1989-UP OEM Number: 8-96017-093-0 Vehicle ACURASLX 1996-1999 4 SP RWD...

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$3.07 - $3.07
$3.07
$3.07 - $3.07
$3.07
Discover a complete selection of piston kits and servo kits engineered for automatic transmissions. At Sun Transmissions, we stock OEM-quality transmission pistons, individual servo pistons, and complete piston rebuild kits compatible with all major transmission brands and models.
Each piston kit is precisely machined and built to meet high performance standards—helping prevent blow-by, sticking, and overheating in clutch assemblies. Designed for durability and reliability, our pistons are ideal for professional rebuilds and heavy-duty applications.
Our catalog includes accumulator pistons, servo pistons, and direct clutch pistons for a wide range of domestic and import transmissions such as 4L60E, 42RLE, 6T40, 5R110W, and more.
Enjoy fast U.S. shipping, expert technical support, and trusted quality for every automatic transmission rebuild.

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