94 7.3l IDI E4OD issues
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BTW there are some aftermarket controllers IF you have Deep Pockets .......so that is something you might look into ..... I wasn't interested.
it's easy enough to convert it to a manual shift BUT you will need a PWM valve controller for the EPC...
I have designed a Test controller using DRV101 IC ... I have used this to replace the VRV on the C6 Tranny and it works fine .. it also controls the EPC just fine.
you can use the original MLPS switch signals with minor logic and a solenoid Driver board to select the solenoids to engage depending on where the shift lever is positioned... the TCC is manually controlled and you won't have any automatic Kick down control... it would be easy to Trash the Tranny using this method so I won't Post my schematics. but I have just given all the info needed to build one
the solenoid select pattern is already given in this Thread too.
it's easy enough to convert it to a manual shift BUT you will need a PWM valve controller for the EPC...
I have designed a Test controller using DRV101 IC ... I have used this to replace the VRV on the C6 Tranny and it works fine .. it also controls the EPC just fine.
you can use the original MLPS switch signals with minor logic and a solenoid Driver board to select the solenoids to engage depending on where the shift lever is positioned... the TCC is manually controlled and you won't have any automatic Kick down control... it would be easy to Trash the Tranny using this method so I won't Post my schematics. but I have just given all the info needed to build one
the solenoid select pattern is already given in this Thread too.
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Got a new pcm ordered
Well I ended up heading to my wife’s work (she works at an auto parts store) and got the same part number pcm ordered. Should be here in 7-10 days so after it arrives I will install it and then post what happens!!! Oh and after the employee discount I paid...... 80$ bucks shipped for a reman unit! Haha not bad in my opinion!
More Turbo
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For future reference what auto parts or supplier did you get it at. Years ago there were none that oriellys could find I had to wait a month or more for mine to be fixed. It had some water leak into it and destroyed a resistor, I can't stand the black box pcm's, that you can't get any info on, to repair them. All you can do is eye ball the components like electrolytic caps etc, and change them.
Scope Wizard
Joined: May 2019
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yes I saw some of those aftermarket controllers floating around online and i will probably go that route if I can’t find an oem one easily. The part number on my pcm is f4tf-12b565-ea. From reading your post I think I can replace this with part number f4tz-12b565-ea. Is that correct? That part number seems like it will be much easier and less expensive to find in my area.
Scope Wizard
Joined: May 2019
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I don't understand this. The EPC is a variable force solenoid, not a PWM. It controls pressure based on the current supplied to it. Are you saying you can use a PWM controller to do this?
I built a controller without any logic boards to do this. It was for a specific racing series that didn't allow any type of computers, and even a simple logic board was considered a computer.
It worked, for a while. The forward clutch drum cannot handle max pressure and this system had no provision to reduce pressure when in 1, so the forward clutch drum blew apart.
I built a controller without any logic boards to do this. It was for a specific racing series that didn't allow any type of computers, and even a simple logic board was considered a computer.
It worked, for a while. The forward clutch drum cannot handle max pressure and this system had no provision to reduce pressure when in 1, so the forward clutch drum blew apart.
and yes you can pretty much drive any solenoid using PWM ==>> here is a link to the Data sheet of the IC I use ==>> HTTP 301 This page has been moved
Like I say it's still not Bullet proof
Just in case that link doesn't work here is the PDF
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For future reference what auto parts or supplier did you get it at. Years ago there were none that oriellys could find I had to wait a month or more for mine to be fixed. It had some water leak into it and destroyed a resistor, I can't stand the black box pcm's, that you can't get any info on, to repair them. All you can do is eye ball the components like electrolytic caps etc, and change them.
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Tranny is working beautifully!
Hey guys finally got my hands on the new tcm! Plugged it in and I swear this tranny works like it is brand new! Can’t wait to start driving this truck once I get some other odds and ends it needs taken care of. Thank you to mark and lonewolf! You guys helped me keep this ole girl on the road!
so when I pulled the old pcm out it was extremely rusty in fact I had to use a hammer and punch from inside the cab to knock it out of it mounting location. Is there a commonly known water leak issue that could have caused this?
so when I pulled the old pcm out it was extremely rusty in fact I had to use a hammer and punch from inside the cab to knock it out of it mounting location. Is there a commonly known water leak issue that could have caused this?
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