A-500 transmission OD and LU controls.

89on35s said

I know my drawing came out hard to read. I'll try and fix it on the next one. I am still considering the pressure switches because I guess I likely won't be adjusting after the system is set up. Now that I see the prices of the timing relays I chose, I am rethinking the entire thing. @TrailBeast do you ever have issues with hunting on OD or LU shifts where they shift in and out when your speed is close to setpoint? That was my reason for the timers, to avoid that. Also, does your kick down vacuum switch disengage OD and LU?

Cley

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Good questions.:D
I don't get a hunting problem because I won't let the speed sit right there, but if for some reason I had to hold that speed I would just switch OD off at the shifter switch for the time being.
Same with LU, but I have never had the need really.
As far as the vacuum switch it is only set up to disengage LU and if I also wanted out of OD while above 55mph I can switch it off at the shifter.

One thing I noticed in setting mine up was that the brake switch disengage didn't matter either, so I don't have that.
The car comes down below 70 where lockup will disengage WAY before it produces a drag on the motor.
The thing is, that fully automatic is nice for longer cruises but if one was serious about putting power down you probably would just want OD and LU manually turned off anyway.

BTW, you are going to LOVE your new fuel economy when you get er done.
My mild cammed headered 4 barrel 5.9 gets a little over 25mpg on the hiway at 80mph at 2,100 rpms.:D
This is how the manual override inside the car is set up.