Spool Performance ZF 8HP70 / 8HP75 / 8HP76 Billet 300M C-Hub Cog Drive
Spool Performance ZF 8HP45 / 8HP50 / 8HP51 Billet 300M C-Hub Cog Drive
The factory C-hub cog drive in ZF 8HP70, 8HP75, and 8HP76 transmissions is produced from cast steel. While adequate at stock power levels, casting brings inherent weaknesses—porosity, uneven grain structure, and localized stress points—that are exposed as torque output, line pressure, and shift aggression increase. Common failure modes include cog tooth deformation, spline wear, and cracking under shock load.
Spool Performance replaces the factory casting with a fully CNC-machined billet 300M C-Hub Cog Drive, engineered specifically for high-torque and high-RPM applications.
300M is an ultra-high-strength, vacuum-melted alloy steel used in aerospace and motorsports driveline components. Compared to cast steel, billet 300M offers dramatically higher strength, superior fatigue resistance, and consistent material properties throughout the part, ensuring it can survive repeated clutch apply events and hard launches.
Each hub is precision-machined to tight tolerances for accurate cog geometry and even load distribution, resulting in cleaner torque transfer, reduced stress concentration, and improved shift consistency.
For any 8HP70/75/76 build running increased power, upgraded clutches, or elevated line pressure, the Spool Performance Billet 300M C-Hub Cog Drive is a critical reliability upgrade, not an optional one.
Ships within 1-2 business days.
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Spool Performance ZF 8HP70 / 8HP75 / 8HP76 Billet 300M C-Hub Cog Drive
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FAQs
Please read our FAQs page to find out more.
Are OEM products more expensive than aftermarket alternatives?
OEM products might have a higher upfront cost compared to aftermarket parts, but their superior quality and durability often make them a more cost-effective choice over time. Investing in OEM ensures you’re getting parts specifically designed for your vehicle, which can lead to better performance and longevity.
Can I purchase OEM parts online or do I need to visit a dealership?
You don’t need to visit a dealership to get OEM parts. You can conveniently purchase genuine OEM components from authorized distributors and reputable online retailers like Turbo Tech Performance. Our online store provides a wide selection of high-quality parts delivered straight to your door.
Are parts from brands like Mopar, ACDelco, and Motorcraft interchangeable between different vehicle brands?
No, parts from Mopar, ACDelco, and Motorcraft are typically designed for specific vehicle brands. It’s crucial to ensure compatibility with your vehicle’s make and model by checking part numbers and consulting with a knowledgeable expert.
Can I install OEM parts myself, or is it better to have a professional handle it?
While some OEM parts can be installed by DIY enthusiasts, the complexity of installation can vary. For the best results and to ensure proper fitment and performance, we recommend having a trained mechanic install the parts, especially if you’re unfamiliar with automotive repairs.
Do OEM parts come with a warranty?
Yes, many OEM auto parts come with a manufacturer’s warranty that covers defects or issues. Be sure to check the warranty details for each part at the time of purchase, and keep your receipt for any potential warranty claims.