zigg
Full Access Member
I finally got around to finishing up my E4OD manual override switch. I put in 2 switches. One is a single pole double throw ,and the other is just an on/off.
Originally, when I put this in, and had the computer out of the loop, the OD switch would start to blink as soon as the trans went into 4th, and the computer tried to lock up the Torque Converter. The trick is to fool the computer into thinking it's still working the solenoid. I found a link to a guy who did this on his 2002. You put a 20,000 ohm 10 watt resistor inline with the computer to ground and this solves it. Sounds complicated? Not really.
So, the computer is connected to the center of the switch, and on the one side, it is switched via the resistor to ground. On the other side, it is as factory, and operates as from the factory. The second switch is connected to the wire that comes from the T/C lockout solenoid, and can be flipped anytime. When it is in the on mode, the T/C solenoid is directly to ground. So, the T/C can be locked anytime, when the switch is in the "Auto" mode, or when in the "manual" mode.
In town, I run in manual. It shifts 1,2,3,4 and no lockup. I can manually lock it anytime I want, and the shifts are nice and smooth and spaced as they should be. In auto, it shifts as from the factory, and the lockup comes on at about 35mph in 3rd.
I think it is a real nice mod for those of us with the Auto, and it gives total control over the trans at any time.
I'm at work, just now, but when I get home if anyone is interested, I'll draw up a short schematic and post it later...
Zigg
Originally, when I put this in, and had the computer out of the loop, the OD switch would start to blink as soon as the trans went into 4th, and the computer tried to lock up the Torque Converter. The trick is to fool the computer into thinking it's still working the solenoid. I found a link to a guy who did this on his 2002. You put a 20,000 ohm 10 watt resistor inline with the computer to ground and this solves it. Sounds complicated? Not really.
So, the computer is connected to the center of the switch, and on the one side, it is switched via the resistor to ground. On the other side, it is as factory, and operates as from the factory. The second switch is connected to the wire that comes from the T/C lockout solenoid, and can be flipped anytime. When it is in the on mode, the T/C solenoid is directly to ground. So, the T/C can be locked anytime, when the switch is in the "Auto" mode, or when in the "manual" mode.
In town, I run in manual. It shifts 1,2,3,4 and no lockup. I can manually lock it anytime I want, and the shifts are nice and smooth and spaced as they should be. In auto, it shifts as from the factory, and the lockup comes on at about 35mph in 3rd.
I think it is a real nice mod for those of us with the Auto, and it gives total control over the trans at any time.
I'm at work, just now, but when I get home if anyone is interested, I'll draw up a short schematic and post it later...
Zigg