My friend is purchasing a haltech, but has an automatic trans. Does the factory computer control auto trans shifting??? will both computers be needed.

 

I have no actual experience, only what I have read in the RX-7 manual and the Haltech manual. The FD ECU has a couple outputs for the tranny, but most of it seems to be controlled by a seperate ECU. The E6K has a torque converter lockup output on it that you might use, but I am unsure.

If anything you can do a kind of piggy back system like you suggested.

 

thanks for your logical input. Your always helpful and down to earth. Ill keep you posted as i learn on this project just for knowledge. Any others out there that might be able to help????

 

Im waiting to hear back from LEVEL 10 transmissions. they build up supra turbo auto's, which is basically the same trans.

 

Please let me know what you do and how it turns out. If it all works out I would like to put it up on my site (with your approval and credit).

Rev. Dr. Jay
http://ricemobile.net/

 

The main ECU doesn't control shifting, the tranny ECU does - however without the main ECU in place to talk to the tranny ECU then you lose the hold ability. The transmission will still shift even if that occurs but I believe it loses the ability to determine whether it will shift in normal mode or performance mode - more likely it locks itself into a normal mode.

As was mentioned the Haltech does have lockup capability but I decided to wire it up in parallel with the stock computers to avoid losing any functionality - i.e Hold mode and the OMP.