SONNAX 104960-10K Apply Piston Kit Clutch High 4TH-5TH-6TH 6L80 6L90

( Brand: Sonnax ), ( Manufacturer Part Number: 104960-10K ), ( Part Type: Piston Clutch )

Review SONNAX Apply Piston Kit Clutch High Capacity

The Sonnax 104960-10K Apply Piston Kit is an essential upgrade for vehicles equipped with 6L80 or 6L90 automatic transmissions, particularly those with 4th, 5th, or 6th clutch applications. This kit is designed to address common issues related to the factory apply piston, which can lead to clutch slippage, premature transmission wear, and subpar performance.

The Sonnax Apply Piston Kit is meticulously engineered to provide superior clutch application force, ensuring smooth and consistent engagement. The piston is manufactured from high-strength billet steel, ensuring durability and longevity. The piston's unique design features an increased piston diameter and optimized piston profile, which translates into improved clutch engagement and reduced slippage.

The kit also includes a high-quality, O-ring sealed, billet steel piston retainer. This retainer is designed to provide a secure fit and prevent the piston from moving out of position, even under high engine torque. The O-ring seal ensures that the piston retainer maintains a positive seal against the transmission case, preventing any transmission fluid leakage.

Additionally, the Sonnax Apply Piston Kit includes a new, high-performance, self-lubricating, coated piston seal. This seal is designed to provide a leak-free, long-lasting seal between the piston and the transmission case. The self-lubricating coating reduces friction and wear, ensuring that the seal lasts as long as possible.

Installing the Sonnax Apply Piston Kit is a straightforward process, and it is fully compatible with the factory torque converter and clutch system. The kit also includes detailed installation instructions, making it an excellent choice for DIY enthusiasts or professional technicians.

In summary, the Sonnax 104960-10K Apply Piston Kit is an essential upgrade for vehicles with 6L80 or 6L90 automatic transmissions that require 4th, 5th, or 6th clutch applications. This kit addresses common issues with the factory apply piston, providing superior clutch application force, improved clutch engagement, and reduced slippage. With its high-quality components, easy installation process, and detailed instructions, the Sonnax Apply Piston Kit is an excellent investment for anyone looking to maximize the performance and longevity of their transmission.

The Sonnax 104960-10K Apply Piston Kit is designed for use in 6L80 and 6L90 automatic transmissions in vehicles such as Chevrolet and GMC. This kit includes various components to help improve clutch performance and longevity. Here are some pros and cons of buying this kit:

1. Enhances clutch performance: The Sonnax kit includes upgraded apply piston, which can help improve clutch engagement and overall performance.

2. Increases clutch life: The upgraded components in the kit can help extend the life of the clutch system, reducing the need for frequent replacements.

3. Easy installation: The kit comes with clear instructions and is designed to be a bolt-on solution, making installation relatively straightforward for DIY enthusiasts.

4. Improves shifting quality: The upgraded components can help improve shifting quality, leading to smoother and more consistent shifts.

5. Suitable for heavy-duty applications: The Sonnax kit is designed to handle the demands of heavy-duty applications, making it a good choice for those who tow or carry heavy loads regularly.

1. Higher cost: The Sonnax kit is more expensive than some OEM or aftermarket clutch kits.

2. May require additional components: Depending on the specific transmission and vehicle, additional components may be required for a complete installation.

3. Not compatible with all vehicles: The Sonnax kit is designed for specific transmissions and may not be compatible with all 6L80 and 6L90 applications.

The Sonnax 104960-10K Apply Piston Kit is a high-quality upgrade for those looking to improve the performance and longevity of their automatic transmission clutch system. While it comes with a higher cost, the benefits of improved clutch performance, increased clutch life, and smoother shifting make it a worthwhile investment for those who require heavy-duty performance from their vehicles. However, it's important to ensure compatibility with the specific transmission and vehicle before making a purchase.

If you're looking for a high-performance clutch kit for your 6L80 or 6L90 automatic transmission and are willing to invest in a more expensive solution, the Sonnax 104960-10K Apply Piston Kit is an excellent choice. However, if you're on a budget or unsure of the compatibility with your specific transmission and vehicle, it may be worth considering alternative options before making a purchase.

Details:

Contents: Backing Plate. The Sonnax kit features a re designed apply piston and dam, along with specially engineered toothed plate. This plate replaces the OE waved and allows direct contact with a friction to increase surface area distribute pressure more evenly across clutch pack. 104960-10K Sonnax Apply Piston Kit 4TH-5TH-6TH High Capacity 6L80 6L90 Clutch 6L90, 104960-10K: 4-5-6 for 6L80, designed use with OE-style, 36-tooth friction plates and original-equipment steel plates, the clutch apply piston kit is engineered to resolve common failure points in GM transmissions.

The kit features a re designed apply piston and dam, along with specially engineered toothed plate. Reinforced backing plate eliminates flex and distortion Toothed apply improves force distribution Compatible with OE-style friction steel plates Increases total clutch count to 7 in 6L80 8 6L90 Note: OEM frictions are approximately 0.063 thick, steels around 0.086. Factory clutch assemblies often fail due to insufficient count and limited apply surface area between the piston pack. By adding one extra OE-thickness friction plate, this kit increases clutch capacity by 17%, making it ideal for builds with higher power output.

Installation in stock vehicles may result noticeably firmer shift feel due to the increased clutch capacity and removal of waved plate.

part #: 10496010k prices

• $133.34-$160.00

specifications motoralph:

• brand: Sonnax
• mpn: 104960-10k
• part type: Piston Clutch

returns motoralph:

• paid by: Seller
• time: 30 Days
• policy: Returns Accepted

offer motoralph:

• started: February 3, 2026
• sold: 0
• availability: In Stock
• quantity: 1
• options: Ship-to-home

shipping motoralph:

• cost: $0.00
• class: Expedited
• type: Fixed
• service: Expedited
• transit: 3-8 Days

seller motoralph:

• # reviews: 677
• city: Miami, Florida
• rating: 99.5%

general motoralph:

• condition: New
• Motors > Parts Accessories > Other

payments motoralph:

• credit card: Mastercard
• other
• wallet: Google-pay

Sonnax 104960-10K Is Similar To:

• Sonnax 22301b-01k 2nd Gear Super Hold Servo Kit A518 46re 46rh A618 47re 47rh 48re A727 (31.7% similar) Note:: for details on shift timing and overlap, please refer to the included instructions. Reduces leakage by 15% compared to other designs. The exclusive Sonnax design incorporates rubber and PDF seals for superior sealing protection against case wear, resulting in enhanced holding force 2ND...(August 24th, 2025)