- Apr 17, 2012
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Would like to keep it automatic, but I'll probably be putting 500-600 hp at the crank when this build is done. Would my C4 trans be able to keep up after a rebuild? Or should I move up to a C6? Recommendations welcome!
This answer is spot on!a properly built C4 can handle the power you intend to make. but it wont be just a "rebuild". you are going to have to upgrade the clutches, as well as the bands, and depending on the materials used, some of the internal rotating parts as well. also you are going to have to upgrade the valve body, the input shaft, etc.
by the way, you will have to do many of the same upgrade with the C6 as well.
You can get good used Aod's for cheap.
After talking with Performance Automatic, they don't have a rebuild kit that will handle that power for a pre 1970 c4. Looks like I got to buy a new trans anyhow. I'll look into those AODs. Thanks.