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So I am kinda on the hunt for a torque converter for my car. But in my readings I have found that the c4's changed at some point (67 ish?), and apparently the spline count changed as well as a few other small thing. My transmission has C6 cast on the case, so I am assuming it is of the first generation. The thing I can't find out is what the spline count is on my transmission (I am at school 3 hours away, with no car, so no, I can't just go check), and different places have 24 and 26 spline listed, so im kinda at a loss as to what it should be. And more importantly, I am assuming 26 is stronger than 24, so if I end up having a 24 spline input shaft, how hard is it to change it to a 26?