MSgpio.com read only forums (Jan.15,2018)

Just a quick update. Due to those pesky things called life and work I had to put things on the back burner. Th 86 F250 is going to be a manual trans now, but I still haven't given up on seeing if this will work. My goal is to work on this over the summer. I have a functional test transmission from a ...

For 585hz I would set the PC PWM Period in Tuner Studio to 1.709 milliseconds?

1 / 585 x 1000 = 1.709. Is that the correct formula for figuring that out?

More info... Since I seem to be the only one interested... :)

Gear ratios
1st = 2.71
2nd = 1.538
3rd = 1
4th = .712
Rev = 2.18

Solenoid Resistances
Shift Sol 1 20-30 Ohms
Shift Sol 2 20-30 Ohms
TCC Sol 20-30 Ohms
Coast Clutch Sol 20-30 Ohms
EPC Sol 4.25-6.50 Ohms

Temp Sensor:
32-58 Deg F 100k ...

There is an upgrade to use a GM EPC solenoid if that helps.

Found out that the later digital range sensor will interchange - the mounts are the same. It has a 5 wire connector.

Ok, so EPS is actually EPC (electronic pressure control). Ford controls that via current control. The engineer I spoke to isn't sure about PWM. He didn't say it wouldn't work, just that he has no idea.

The CCS in an interesting bag. It should only be on during coast and again, never in 4th. If it ...

Ok, got some information from a retired Ford transmission engineer.

The Coast Control Solenoid is used to provide engine braking while in gears 1-3. It should never be used in 4th as it will cause a tie-up condition where rotating parts inside the transmission stop rotating... It can be left off ...

I'm in the process of converting an 86 F250 to EFI using a MS3 with the MS3x and I will be adding an E4OD transmission. I was looking at another controller but I would like to keep everything MS if I can.

Other that knowing that there is work on a MS based trans controller I know very little about ...