4L60, 4L60-E, 4L65-E, 4L70-E

Heavy Duty Overrun Clutch Hub
Part No. 74574-HD

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The overrun clutch hub found in GM 4L60 (700-R4), 4L60-E, 4L65-E and 4L70-E units is highly susceptible to cracking and breaking in applications such as autocross. Stop hub failure with Sonnax heavy duty overrun clutch hub 74574-HD, which features high-strength steel and thicker material for trouble-free performance when applying deceleration engine-braking in D3, D2 or D1 ranges.

  • 2X Thicker than OE clutch hubs to prevent cracking and breaking in critical areas that engage the input sprag inner race
  • Manufactured from high-strength 4140 chromoly steel
  • Direct replacement for '95-later hubs
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