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Details Images
Product Overview
This premium U440 / U440E / S40I / TS-40SN Transmission Clutch Piston Kit (4 Pcs/Set) is a complete hydraulic sealing rebuild pack engineered specifically for Aisin 4-speed transverse automatic gearboxes. In these compact drivelines, vulcanized rubber-moulded pistons seal the clutch drums (Forward, Direct, Reverse) to maintain critical line pressure during gear shifts. Over extended mileage and thermal cycling, factory rubber lips harden, shrink, crack, or tear away from their steel bases. This causes severe hydraulic pressure bleed-off, leading to clutch slippage under acceleration, delayed D/R engagement thuds, flare shifts, and burnt friction plates. This TRANSWIN 4-piece piston set utilizes high-temperature fluororubber vulcanized to heavy-duty steel cores, ensuring zero pressure leakage, crisp clutch application, and long-term shifting stability.
Product Specifications
- Transmission Model: Aisin Warner U440 / U440E / U441E / S40I / TS-40SN (4-Speed Automatic)
- Product Name: Automatic Transmission Moulded Rubber Clutch Piston Kit
- Kit Quantity: 4 Pieces per Set (4 Pcs/Set - Complete set covering essential clutch drum applications)
- Material Construction: High-Grade Heat-Resistant Fluororubber (FKM/Viton Compound) Bonded to High-Tensile Stamped Steel Cores
- Condition: Aftermarket 100% Brand New (Engineered to strict OEM dimensional and pressure containment tolerances)
- Pressure Rating: 100% Leak-tested under high hydraulic pressure simulations to eliminate fluid blow-by.
Vehicle Application & Compatibility
Compatible with U440, U440E, S40I, and TS-40SN 4-speed automatic transmissions widely used across global compact vehicles:
- Toyota: Yaris, Vitz, Echo, Belta, Platz, Ist (1.0L, 1.3L, 1.5L)
- Suzuki: Swift, Ignis, Wagon R, MR Wagon, Lapin
- Daihatsu: Sirion, YRV, Storia, Charade
- Chevrolet / Pontiac: Aveo, Wave (equipped with Aisin 4-speed automatics)
- Note: Please verify your specific gearbox model designation code on the case ID tag or cross-reference piston lip diameters with our B2B technical team prior to ordering.
Key Features & Advantages
- High-Temperature Vulcanized Rubber: Formulated with premium elastomer compounds that resist hardening, cracking, and fluid swelling under scorching transmission oil temperatures.
- Precision Steel Base Bonding: Features micro-finished bonding interfaces that prevent rubber lip separation from the steel piston shell under sudden line pressure spikes.
- Instant Shift Response: Restores factory-spec hydraulic clamping force, completely eliminating shift flares and clutch slippage.
- Complete 4-Piece Repair Pack: Provides all necessary moulded pistons for a complete clutch drum overhaul, saving workshop sourcing time.
Why Choose TRANSWIN?
As a professional global supplier of automatic transmission parts, TRANSWIN is dedicated to delivering industry-leading reliability and performance. When you partner with us, you benefit from:
- Premium OEM Quality: All TRANSWIN parts are manufactured using high-grade materials and undergo 100% rigid testing to ensure precise fitment and prolonged service life.
- Factory-Direct Pricing: We offer highly competitive wholesale pricing to maximize profit margins for transmission repair shops, distributors, and parts importers worldwide.
- Extensive Inventory & Fast Shipping: Our robust supply chain ensures reliable stock availability and prompt, efficient global shipping to keep your business moving.
- Professional B2B Support: Backed by transmission experts, TRANSWIN provides comprehensive technical assistance and reliable after-sales service for hassle-free purchasing.
Details Images
Product Overview
This premium U440 / U440E / S40I / TS-40SN Transmission Clutch Piston Kit (4 Pcs/Set) is a complete hydraulic sealing rebuild pack engineered specifically for Aisin 4-speed transverse automatic gearboxes. In these compact drivelines, vulcanized rubber-moulded pistons seal the clutch drums (Forward, Direct, Reverse) to maintain critical line pressure during gear shifts. Over extended mileage and thermal cycling, factory rubber lips harden, shrink, crack, or tear away from their steel bases. This causes severe hydraulic pressure bleed-off, leading to clutch slippage under acceleration, delayed D/R engagement thuds, flare shifts, and burnt friction plates. This TRANSWIN 4-piece piston set utilizes high-temperature fluororubber vulcanized to heavy-duty steel cores, ensuring zero pressure leakage, crisp clutch application, and long-term shifting stability.
Product Specifications
- Transmission Model: Aisin Warner U440 / U440E / U441E / S40I / TS-40SN (4-Speed Automatic)
- Product Name: Automatic Transmission Moulded Rubber Clutch Piston Kit
- Kit Quantity: 4 Pieces per Set (4 Pcs/Set - Complete set covering essential clutch drum applications)
- Material Construction: High-Grade Heat-Resistant Fluororubber (FKM/Viton Compound) Bonded to High-Tensile Stamped Steel Cores
- Condition: Aftermarket 100% Brand New (Engineered to strict OEM dimensional and pressure containment tolerances)
- Pressure Rating: 100% Leak-tested under high hydraulic pressure simulations to eliminate fluid blow-by.
Vehicle Application & Compatibility
Compatible with U440, U440E, S40I, and TS-40SN 4-speed automatic transmissions widely used across global compact vehicles:
- Toyota: Yaris, Vitz, Echo, Belta, Platz, Ist (1.0L, 1.3L, 1.5L)
- Suzuki: Swift, Ignis, Wagon R, MR Wagon, Lapin
- Daihatsu: Sirion, YRV, Storia, Charade
- Chevrolet / Pontiac: Aveo, Wave (equipped with Aisin 4-speed automatics)
- Note: Please verify your specific gearbox model designation code on the case ID tag or cross-reference piston lip diameters with our B2B technical team prior to ordering.
Key Features & Advantages
- High-Temperature Vulcanized Rubber: Formulated with premium elastomer compounds that resist hardening, cracking, and fluid swelling under scorching transmission oil temperatures.
- Precision Steel Base Bonding: Features micro-finished bonding interfaces that prevent rubber lip separation from the steel piston shell under sudden line pressure spikes.
- Instant Shift Response: Restores factory-spec hydraulic clamping force, completely eliminating shift flares and clutch slippage.
- Complete 4-Piece Repair Pack: Provides all necessary moulded pistons for a complete clutch drum overhaul, saving workshop sourcing time.
Why Choose TRANSWIN?
As a professional global supplier of automatic transmission parts, TRANSWIN is dedicated to delivering industry-leading reliability and performance. When you partner with us, you benefit from:
- Premium OEM Quality: All TRANSWIN parts are manufactured using high-grade materials and undergo 100% rigid testing to ensure precise fitment and prolonged service life.
- Factory-Direct Pricing: We offer highly competitive wholesale pricing to maximize profit margins for transmission repair shops, distributors, and parts importers worldwide.
- Extensive Inventory & Fast Shipping: Our robust supply chain ensures reliable stock availability and prompt, efficient global shipping to keep your business moving.
- Professional B2B Support: Backed by transmission experts, TRANSWIN provides comprehensive technical assistance and reliable after-sales service for hassle-free purchasing.
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