you prolly have one of a kind now! one of those with a 10 banger in front if it!

 

Well…. The good news… I successfully implemented bypassing PATS by running the PCM’s in parallel! The bad news – it made no difference. Same exact symptoms - except there is no blinking theft light.

 

well that's a kick in the pants...

 

That's not exactly what I said...

 

confusion... man i need to quit staying up til 2 talking to the g/f...

 

How much the new PCM costs? After all the trouble you went through to get this far. i would go that route if the shop guarantees it would work. You have to eat peanut butter sandwiches for a few days.

Good Luck.

 

I have a new theory. The V10 4R100 torque converter had 5 studs and my 4R100 torque converter has 4 studs. I have to assume this is because the torque converters are different internally. Different internals probably means different stall speeds.

"Turbine speed sensor (TSS)

This may also be known as an input speed sensor (ISS). This sensor sends a varying frequency signal to the TCU to determine the current rotational speed of the input shaft or torque converter. The TCU uses the input shaft speed to determine slippage across the torque converter and potentially to determine the rate of slippage across the bands and clutches. This information is vital to regulate the application of the torque converter lock-up clutch smoothly and effectively."

I think I'm getting the code P0500 (VSS) because the V10 PCM expects to see a different stall speed from the torque converter and thus thinks its getting an erroneous signal from the VSS.

Of course the only way to know is a crap load of work.

 

Found this too:


FORD MOTOR COMPANY REVISION DATE: NOVEMBER 12, 2007 PAGE 50 OF 55
4R100 (E4OD) (RWD) Transmission
(turbine speed sensor in most applications)
Transmission Inputs
The Digital Transmission Range (DTR) sensor provides a single analog and three digital inputs to the PCM. ThePCM decodes the inputs to determine the driver-selected gear position (Park, Rev, Neutral, OD, 2, 1). This inputdevice is checked for opens and invalid input patterns. (P0708, P0705)The Vehicle Speed Sensor (VSS), Turbine Shaft Speed (TSS) sensor and Output Shaft Speed (OSS) sensor, ifequipped, are analog inputs that are checked for rationality. If the engine rpm is above the torque converter stallspeed and engine load is high, it can be inferred that the vehicle must be moving. If there is insufficient output fromthe VSS sensor, a malfunction is indicated (P0500). If there is insufficient output from the TSS sensor, amalfunction is indicated (P0715). If there is insufficient output from the OSS sensor, a malfunction is indicated(P0720)

 

So I'm kind of throwing in the towel here. I posted my situation to justanswer.com - which is where I have found a lot of my wiring diagrams - and so far, 3 technicians have reviewed it and given up. It looks like a good deal. I don't pay if they can't answer my question.

 

in your vids i looks like your tach worked, so id follow someone doing 60 and check your tach and make a mental note on what your RPM's are and go with that. other than that you have one hell of a ride man! it was cool watching this from start to end!.

 

I don't actually care about the speedometer not working that much. It throws a P0500 which will prevent me from passing emissions. It also affects the transmission. I can't manually downshift into 1st, and the shifting is not right. I don't know if it is adversely affecting the life of the transmission, so I'm afraid to tow anything. That is the primary function of the truck - hauling my stuff around.

That being said, it is pretty damn cool to show people I have a V10 in there, and that I did it all myself - with help from all you cool people on these forums - in my garage.

 

I am not impressed by the justanswer.com service so far. First guy gave me a TSB for an ignition lock cylinder. REALLY? WTF? The next guy gives me standard testing procedures for VSS. Dude...

Anyway, looks like I'm still on my own.

UPDATE: I got someone who is starting to actually think about this stuff and I'm making progress! <fingers crossed>

 

The justanswer.com guy I ended up with is really fantastic. He really spent a lot of time thinking about my issue. He also provided me with a lot of diagrams and pinouts and such, so it was totally worth the $32 to me.

Unfortunately, I think I ultimately figured it out. It will be a lot of work and a little money to prove, but I'm pretty confident it's the V8 torque converter.

I pulled pin #54 out of the PCM (Torque Converter Clutch Solenoid) and the speedo never quit, and it never threw a P0500. Unfortunately, it threw a P0743 - no surprise there - which will still make me fail emissions. What did surprise me is that #54 was always hot until I hit about 60 MPH on the jackstands, then it lost power so I assumed that meant the converter was unlocked until 60ish. Under that assumption, I thought the truck would stall with no power to #54, but it doesn't.

 

maybe to save a little bit of money, you may have already been thinking this, get a torque converter from a junkyard, even if it is on its way out you should be able to tell if that is it. right?

 

Code: P0743

Component: TCC, wiring, PCM

Description: TCC solenoid circuit failure during on-board diagnostic

Condition: TCC solenoid circuit fails to provide voltage drop across solenoid. Circuit open or shorted or PCM driver failure during on-board diagnostic.

Symptom: Short circuit: engine stalls in second (OD, 2 range) at low idle speeds with brake applied.
Open circuit: torque converter clutch never engages. May flash TCIL.

Action: WIRING OR PTS HYDROSYSTEM

This is what I found on that code in case you hadnt found much yet