700R4, 4L60E, 4L65E, 4L70E Heavy Duty Overrun Clutch Hub Sonnax # 74574-HD.
The overrun clutch hub found in GM 700R4), 4L60E, 4L65E and 4L70E 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