Jim Smart
August 13, 2007
When shopping for C4 cores and parts, be mindful of the following differences:
C4Dual-Range'64-'66Small-dot/large-dot valvebody with 24/24-spline Cruise-O-Matic input shaft; C4, C5, C6 casting numbers
C4Select Shift'67-'69P-R-N-D-2-1 shift pattern with 24/24-spline input shaft; C7, C8, C9 casting numbers
C4Select Shift'70P-R-N-D-2-1 shift pattern with 26/26-spline input shaft; D0 casting number
C4Select Shift'71-'79P-R-N-D-2-1 shift pattern with 26/24-spline input shaft; D1, D2, D3, D4, D5, D6, D7, D8, D9 casting numbers
C5N/A'82-'86The C5 is a C4 with a locking torque converter; D2, D3, D4, D5 and D6 casting numbers

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