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Performance C4 Transmission Solid Drum

<B>4-a</B> The Dynamic solid strength forward drum (PN DA4D1) is another Dynamic exclusive trick used to allow their C4s to live long, healthy lives. If you look closely in the center of picture B, you can see a yellowish coloration in three "peanut"-shaped areas. On the stock Ford drum, these areas are machined openings that can cause deflection within the walls of the drum under heavy application of power.
How To: Performance C4 Buildup

 4-a The Dynamic solid strength forward drum (PN DA4D1) is another Dynamic exclusive trick used to allow their C4s to live long, healthy lives. If you look closely in the center of picture B, you can see a yellowish coloration in three "peanut"-shaped areas. On the stock Ford drum, these areas are machined openings that can cause deflection within the walls of the drum under heavy application of power.  View Related Article

 

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