GMC Sierra Transmission & Converter Package - BD Diesel TowMaster Allison 1000 (2017–2019). Built for reliability and confident towing, this package upgrades your Sierra’s Allison 1000 with proven BD components.

Engineered for stock or mildly modified Duramax GM trucks, including 2017–2019 GMC Sierra 6.6L L5P, the TowMaster increases durability where it counts. A recalibrated valve body, added clutch counts, and a revised pump work together with higher line pressure to reduce slip and wear under load. BD’s Deep Aluminum Pan adds roughly 3.5 extra quarts of ATF to help manage temperatures while towing. Every package includes a BD ProForce torque converter for efficient power transfer and dependable lockup. These enhancements combine to boost torque holding capacity by over 80% compared to stock.

Features

• BD TowMaster Allison 1000 transmission
• Modified valve body and pump calibrations
• Increased clutch counts for added durability
• Higher line pressure to limit slip under load
• BD Deep Aluminum Pan (+~3.5 quarts)
• Includes BD ProForce torque converter

Have questions or planning a build? Call our Austin, TX shop at 512-982-9393 or our Los Angeles, CA area shop at 562-981-6800. We offer installation and customization services at both locations.

Thinking about purchasing multiple items? Contact us for shipping discounts. We install on premises at both locations.

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