Rein TSK0025 Transmission Service Kit

BMW GS7D36 Transmission Service Kit

Rein TSK0025 is an OE-quality transmission service kit for the BMW GS7D36 dual clutch transmission. It is built for preventative maintenance on late-model BMW M applications, with a focus on hydraulic circuit service and wet clutch filter replacement.

For BMW M3, M4, M5, M6, M6 Gran Coupe, and M2 vehicles equipped with the GS7D36 transmission, this kit provides the OE components needed to service the transmission fluid path and help maintain shifting performance.

Key Features

• GS7D36 transmission preventative maintenance service kit
• Services late-model BMW dual clutch transmissions
• Includes OE components for durability and proper service fit
• Helps maintain transmission function and service life
• Includes oil pan and gasket, clutch filter, suction filter, and mounting bolts

Detailed Description

Rein TSK0025 is designed for BMW GS7D36 dual clutch transmission service, with coverage for 2012-2021 BMW performance models including the M5, M6, M6 Gran Coupe, M3, M4, and M2. The kit addresses the hydraulic circuit and wet clutch filtration system, where debris control is important for long-term transmission operation. The OE clutch filter cartridge serves as the first stage of protection against clutch material circulating through the gearbox, and it should be replaced during fluid service.

Rein recommends periodic fluid and filter changes on higher-mileage or performance-driven vehicles, even where the original fluid is described as long-term fill. For this service, CRP recommends OE DCTF-1+ or Pentosin FFL-4 DCT fluid. This part cross-references BMW 23018441997 and 28107842385 for the same application. Rein TSK0025 is a direct service solution for BMW M3 and BMW M4 owners, as well as BMW M5 and BMW M6 applications using the GS7D36 transmission.

What It Helps Address

• Transmission fluid contamination from clutch debris
• Reduced shift quality from aged DCT fluid
• Restricted hydraulic flow in the transmission service circuit
• Wear-related service issues in higher-mileage BMW M models
• Loss of filtration efficiency in the wet clutch system

Installation Notes and Tips

Drain and refill the transmission using the correct DCT fluid specified for the GS7D36 application. Replace the clutch filter cartridge during every fluid service, and inspect the oil pan sealing surface before reassembly. Follow BMW service procedures for fluid level setting and temperature-based fill checks to ensure proper operation after service.

Quality Assurance

Rein OE Quality parts are built for application-specific service work on BMW transmissions. This kit is backed by a 24-month/24,000-mile warranty.