I'm really undecided about what auto transmission to go with on the 86 coupe. I have a fresh 408w sitting on the stand. The original car (different 86 coupe) needed a lot of work and a nicer 86 coupe sorta fell in my lap. So I need to make my decision soon.
I have a fresh rebuilt c4 that was leftover from another car, when I decided to swap in a t5. It's basically a stock c4 with upgraded servos for firmer shifts. Plans for the 408w include a dose of nitrous, and I'm hoping to eventually make 600whp or so. I don't know a lot about the autos, so here's my dilemma.
I can't afford to spend a fortune on it. What would the c4 need to hold this kind of power? And what is the cost involved?
I really want overdrive, since the closest track is over an hour away. I would keep the c4 if it means big savings. Otherwise, I'm better off with an aod or 4r70w. My thought is that the 4r70w will hold up ok with a few upgrades (jmod, good cooler). The expense would come from the controller and converter. But if I destroy it, the 4r70w is cheap and plentiful. On the other hand, an aod is also cheap. Save a grand right off the top, from not requiring the controller... but a rebuild for that power level will be more as well as replacement cost.
Sorry for the long post. I'm just looking for ideas here and wanted to see what you guys were using. I'm open to any suggestions.
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