Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

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HOMESERVICE MANUALSBUICK2013REGAL TURBO PREMIUM, STANDARD TRANSREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 119 (AUTOMATIC TRANSMISSION - 6T45 - REPAIR INSTRUCTIONS - OFF VEHICLE)REPAIR INSTRUCTIONS - OFF VEHICLE3-5-REVERSE AND 4-5-6 CLUTCH HOUSING ASSEMBLE (6T40/45/50)4-5-6 CLUTCH PISTON INSTALLATION

2013 Buick Regal Turbo Premium, Standard Trans

4-5-6 Clutch Piston Installation

2013 Buick Regal Turbo Premium, Standard TransSECTION 4-5-6 Clutch Piston Installation

WARNING: This page is about a different car, the 2011 Buick Regal. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Exploded View Of 4-5-6 Clutch Piston Assembly

Courtesy of GENERAL MOTORS CORP.

4-5-6 Clutch Piston Installation

Callout	Component Name
1	4-5-6 Clutch Piston Inner Seal
2	4-5-6 Clutch Piston Outer Seal (Large) (Rounded)
3	4-5-6 Clutch Piston Outer Seal (Dark Blue) (Stepped)
4	4-5-6 Clutch Piston Tip: DT-47805: seal protector prevents the piston seal lip from damage during installation. Apply a thin coat of ATF to the I.D. of DT-47805: seal protector to ease the installation of the piston. DT-47951-2: spring compressor can be used as a pusher if necessary. Special Tools DT-47805: Seal Protector DT-47951-2: Spring Compressor For equivalent regional tools, refer to Special Tools .

RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.
• Brakes feel soft, pull hard to one side, or make grinding noises.
• The engine overheats, stalls repeatedly, or misfires under load.
• You are missing required tools, torque specs, or safe lifting equipment.
• You are not confident in the next step or safety outcome.