So is the A440F a 4 or 5 speed?

[Lka1988]

The FSM confirms this, but I have never seen the actual wire on mine. Lane, I would appreciate it if you would share some tasty tidbits regarding the slushbox.

4 spd transmission. The TC locks/unlocks right around 45 mph for the last 18 years.

Below is a clip from the FSM.

Jon, the O/D solenoid is on the driver side of the tranny, towards the transfer case. It's a 3-prong plug on a pigtail. The CC ECU controls OD (pin 9) by grounding the solenoid at the ECU.

Check out the Cruise Control section in the FSM, Body Electrical pg. 67-70

 

[Lka1988]

I'm curious now... The Gauge fuse supplies power to the O/D solenoid, I wonder what would happen if one removes that fuse. Aside from the obvious things not tranny related...

 

[jonheld]

2 years ago I had a bad exhaust leak. On the way to the Yankee Toys Fall Gathering the rear electrical harness melted taking out a variety of electrics including the gauge fuse. I ran the rest of the way up without gauges, dash lights, tail lights, etc. Wouldn't have been so bad if it was daytime, but sh*t happens.

There was no transmission issues at all. 4th gear and 4th gear TC lockup remained constant. Cruise control didn't work at the time. The only things that did work were the headlights and engine management.

 

[yah.h00ey]

No windows, gauges (including speedo), heat/air, etc.

 

[Lka1988]

2 years ago I had a bad exhaust leak. On the way to the Yankee Toys Fall Gathering the rear electrical harness melted taking out a variety of electrics including the gauge fuse. I ran the rest of the way up without gauges, dash lights, tail lights, etc. Wouldn't have been so bad if it was daytime, but sh*t happens.

There was no transmission issues at all. 4th gear and 4th gear TC lockup remained constant. Cruise control didn't work at the time. The only things that did work were the headlights and engine management.

Yeah, I tried driving without the gauge fuse on the way to church this morning. No issues, shifted into OD just fine. No lockup, though, I didn't get over 40.

 

[Eicca]

Amazing. The difference between stickshifts and automatics makes so much more sense now.

I'm gonna sit back and let you guys chat. This is a fascinating subject.

 

[Stone]

Jon, the O/D solenoid is on the driver side of the tranny, towards the transfer case. It's a 3-prong plug on a pigtail. The CC ECU controls OD (pin 9) by grounding the solenoid at the ECU.

Check out the Cruise Control section in the FSM, Body Electrical pg. 67-70

With my diesel swap I turfed the whole ECU and didn't even have the CC module plugged in for the longest time. Now it's plugged in, but not working because the cable is totally wrong for the 12H-T. I'm sure that my A440 has been going into OD the whole time and working as it should...?

 

[Lka1988]

With my diesel swap I turfed the whole ECU and didn't even have the CC module plugged in for the longest time. Now it's plugged in, but not working because the cable is totally wrong for the 12H-T. I'm sure that my A440 has been going into OD the whole time and working as it should...?

Don't worry Stone, I'm confused, too. I pulled my gauge fuse (power to OD) and it still shifted into OD.

Gonna pull the solenoid plug next and see what happens...

 

[Darwood]

The torque converter clutch has nothing to do with clutch packs in the tranny itself. Once a clutch pack is applied, it should not slip at all. If a clutch pack is slipping, then you have bigger problems... However, like I said, the torque converter will always allow for slippage until its clutch locks up.


X2 on Rodney's "Extreme" valve body.....Do want do want do want do want do want do want do want do want do want do want do want do want do want do want do want do want do want do want do want do want do want do want do want........

To add, the torque converter slippage is done via the fluid coupling not a clutch. The clutch or whatever should only be used for lockup.

 

[SuperRunner]

With my diesel swap I turfed the whole ECU and didn't even have the CC module plugged in for the longest time. Now it's plugged in, but not working because the cable is totally wrong for the 12H-T. I'm sure that my A440 has been going into OD the whole time and working as it should...?

Maybe, maybe not. The cruise control unit works completely separate from your ECU, so if you do an engine swap, overdrive can still work as it gets its speed signal from the spedometer guage...I think. You could test this by hooking up a voltmeter or a test light to the output of the cruise computer to the solenoid.

I would really find out if it is working though, you can toast your trans pretty quick without it, especially if it has high miles.

 

[Stone]

Maybe, maybe not. The cruise control unit works completely separate from your ECU, so if you do an engine swap, overdrive can still work as it gets its speed signal from the spedometer guage...I think. You could test this by hooking up a voltmeter or a test light to the output of the cruise computer to the solenoid.

I would really find out if it is working though, you can toast your trans pretty quick without it, especially if it has high miles.

I'm 100% sure that it was going into OD without the ECU and without the CC module even in the truck. I haven't found any difference by plugging the CC module back in.

 

[SuperRunner]

Not really possible, here is the wiring. Are you sure your cruise ecu is disconnected? Why would you disconnect it, and where did you disconnect it, as in where is the ECU located?

 

[Stone]

Maybe that's where I'm not very clear...I have gotten rid of the main ECU and the associated wiring in the looms that were not being used. I also at one point had the Cruise Control module out of the truck. If there is another ECU for the CC that's separate from the EFI stuff, then no, I didn't fiddle with that or even find it. Maybe I'll just look through my FSM later after work to make sure I'm using the right terms to avoid further confusion.

Cheers.

 

[SuperRunner]

The cruise control is located no where near the ECU for the motor. It is mounted near the steering column.

 

[Lka1988]

overdrive can still work as it gets its speed signal from the spedometer guage...I think.

This confuses me... My speed sensor is shot, causing my CC to not work. Yet OD still works.

I'm thinking OD may only be partially electronic, if that makes any sense, i.e. governor pressure can still overcome the spring in the valve (if there is a spring), forcing it into OD. Dunno, though, just pure speculation. I haven't torn into the valve body.

What I'm saying is there's gotta be a mechanical aspect to OD that we're not seeing in the CC'd model.

 

[Stone]

The cruise control is located no where near the ECU for the motor. It is mounted near the steering column.

Thanks...forget everything I said then...I didn't tamper with the CC ECU.

 

[jonheld]

This confuses me... My speed sensor is shot, causing my CC to not work. Yet OD still works.

I'm thinking OD may only be partially electronic, if that makes any sense, i.e. governor pressure can still overcome the spring in the valve (if there is a spring), forcing it into OD. Dunno, though, just pure speculation. I haven't torn into the valve body.

What I'm saying is there's gotta be a mechanical aspect to OD that we're not seeing in the CC'd model.

We could be approaching this wrong. Perhaps the OD actuator from the CC circuit disengages OD when it feels it needs the transmission to downshift. That makes far more sense than it enabling OD.

 

[Lka1988]

We could be approaching this wrong. Perhaps the OD actuator from the CC circuit disengages OD when it feels it needs the transmission to downshift. That makes far more sense than it enabling OD.

Like when one hits the "accelerate" button on the CC stalk, it'll dump pressure from the 3-4 valve and kick it down into 3rd (I'm thinking)?

Now THAT makes sense.

 

[SuperRunner]

nope, if that where the case, you would stall the motor when you hit the brakes. Only when the solenoid is activated by a 12v power source will the lockup engage.

Just because your CC doesn't work, doesn't mean the CC ECU isn't working. My CC didn't work either with my new motor, but my O/D worked great.

But now that I ditched the A440 mush box for the smooth shifting A750, the ECU control everything...awsome!!!

 

[Lka1988]

nope, if that where the case, you would stall the motor when you hit the brakes. Only when the solenoid is activated by a 12v power source will the lockup engage.

Just because your CC doesn't work, doesn't mean the CC ECU isn't working. My CC didn't work either with my new motor, but my O/D worked great.

But now that I ditched the A440 mush box for the smooth shifting A750, the ECU control everything...awsome!!!

But we're not talking about lockup...