Join Date: Feb 2001
Location: The Sticks of Central TX
Re: C4, C9, C10????
Uhm the C4 came with two versions of the input shaft.
From 1964 through 1969, the C4's made had a 24 spline input shaft and front hub assembly, and with the lower spline count came a slightly smaller diameter on the input shaft. However, the valve bodies in the transmissions are different. The valve bodies fall into 4 different groups. 64-66, 67-70, 70-81, and the Pinto valve body. In 1970, the C4 got an upgrade. The input shaft and front hub were strengthened by enlarging them to 26 spline, increasing the input shaft diameter, but also making its tc and input shaft non-interchangeable with the older 24 spline 64-69 C4's.