While I have you check out this post.. I wonder how they sped up the filling and draining of the secondary coupling? Wow would that change the personality of that transmission.. I played with changing the valve springs in that box but it was just too hard. So I totally ruined that cars personality by swapping a generic 455/Turbo 400 into it, what a mistake that was!! I should of just left the 389/Super hydro alone!! All it needed was a nice set of 3.08s
The post,
"315 Controlled Coupling Hydramatic"
Super Hydramatic the capacity is 18 pts.
I have never seen a controlled coupling puke because the secondary dumped to fast. The factory says draining and refilling of the S coupling happens in four tenths of a second and for racing we used to modify that by half.
I have seen the dip stick blow out of controlled coupling P 315 , "D" type single and dual range Hydramatic, Turbo 350 & 400 Hydramatic's because they were overfilled and have seen a T-400 with a problem similar because the vent tube was blocked".
Don
Last edited by 389; 09-27-2020 at 05:20 PM.
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