A/T - 200C/2004R, 700-R4 Lip Seal Packages Part Numbers
TSB 85-6SUBJECT: 200C/200-4R/700-R4
The part numbers previously provided for the lip seal and servo packages for the 200 C, 325 4L and 200 4R transmissions included the piston. The following numbers are provided for the lip seals only. Remember that the seals are not interchangeable, that the pistons were changed to accept lip seals. The piston with the rib all the way around the seal groove must use teflon, and if the seal groove is flat in the bottom, then it must use the new lip seals.
SERVO SIZE SEAL ONLY KIT WITH PISTON
.52 small 8639782 8638938
.60 medium 8639783 8638937
.67 large 8639784 8638936
The large seal for all size servo's is 8639780
To firm up both the 1-2 and 2-3 shift on any of these units, you can try installing a LARGER diameter servo.