The intermediate servo on the right hand side is removed first. Because this C4 is for a six cylinder, it has the "Z" servo, the smallest for a C4. Servo size is a matter of piston/bore size and displacement. High-performance applications call for the largest "C" servo, which yields a firmer intermediate band lock-up. The "C" servo is available as a reproduction. TCI Automotive also has a large intermediate servo kit (No. 523005) available for C4 transmissions.