Replacing TCU

[nydeli167]

Hi guys , I'm wondering if any of you can answer me this question i'm having a hard time right now with my Plymouth laser rs turbo 2.0 1991 I'm looking to replace the TCU because after months of trying to verify what was going wrong with my car it appears that the tcu it has was from a Mitsubishi mirage 1.5 the car arrived in my hands with that issue but the question is Car that is originally made turbo but then has no turbo can use a tcu from a non turbo car?And ill really appreciate which tcu could be match up with this connectors?? any serial number in specific?

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[Soccerguy136]

This should give you all the info you are looking for:

http://www.dsmtuners.com/forums/articles-drivetrain/277172-1g-tcu-guide.html

 

[Bud92gsx]

Looks like a 6 bolt 3 plug tcu.


I bet miller auto has a few of these laying around http://www.dsmtuners.com/forums/ven...oday-91-tsi-text-me-parts-828-429-9194-a.html

 

[steve]

You sure you want a TCU (Transmission Control Unit)? Those look like the ECU (Engine Control Unit) connectors?

 

[Bud92gsx]

^ Steve there are two different tcus for our auto cars a 6 bolt 3 connector tcu and 7 bolt 2 connector tcu.

But that does look similar to the ecu harness tho too.

 

[steve]

Just making sure by asking since I can't count pins in little pictures very well anymore.
I took the time and counted them, sure enough it's the 42 pin TCU connectors. I assume he needs a MD750092.

 

[Bud92gsx]

I can't count pins in little pictures very well anymore.
I took the time and counted them

Epic.

 

[nydeli167]

Just making sure by asking since I can't count pins in little pictures very well anymore.
I took the time and counted them, sure enough it's the 42 pin TCU connectors. I assume he needs a MD750092.

well thank you for the help but basically is a tcu connector dont worry my ecu is connected to his propper place. But i was asking for a car that was from first place turbo can be connected a non turbo tcu since my turbo is not in my car anymore

 

[Bud92gsx]

^ Yes it can,the shift points might be different but it really runs on throttle position to control the trans shift points.

So it shouldnt make a difference, the part number steve gave was probably a generic tcu for our trans. Which would make it the same shift maps for the n/t cars, and based on throttle position like I just said for shifting.

Also no need for very large lettering here.

 

[nydeli167]

well thanks i need my baby running soon and thanks to the other tcu the trans was going limp that is qhy i asked before any ideas where i can find on to buy?

 

[steve]

IIRC there were different transmissions between the turbo (F4A33 or W4A33) and non-turbo (F4A22) and there are different versions of each type between different cars and years with changes that require electrical as well as programming differences in the TCU's. You need the TCU that matches the transmission.

I assumed that the car mentioned was the same one in your profile and that it still had the original automatic transmission, leading to that part number TCU. I am troubled by the details. I don't remember there being a 91 Plymouth Laser RS AWD, the first year Plymouth had a AWD versions was 1992 and [ame="http://en.wikipedia.org/wiki/Plymouth_Laser"]according to others[/ame] didn't have a automatic AWD until 1993. Yet this does look like a 1GA Laser RS from the profile with the painted Targa band, black beltline, no wing, and the Laser mesh wheels up front. Does it have popup headlights?

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Finding a good TCU can be difficult, the capacitors inside them leak just like with the ECU's but when they do, the corrosion eats into the voltage regulator and often dumps battery voltage on the 5v bus blowing up all the IC's. When you find a good working one, change the capacitors right away to keep it working.

 

[Bud92gsx]

well thanks i need my baby running soon and thanks to the other tcu the trans was going limp that is qhy i asked before any ideas where i can find on to buy?

Post #3 Miller auto.

 

[nydeli167]

IIRC there were different transmissions between the turbo (F4A33 or W4A33) and non-turbo (F4A22) and there are different versions of each type between different cars and years with changes that require electrical as well as programming differences in the TCU's. You need the TCU that matches the transmission.

I assumed that the car mentioned was the same one in your profile and that it still had the original automatic transmission, leading to that part number TCU. I am troubled by the details. I don't remember there being a 91 Plymouth Laser RS AWD, the first year Plymouth had a AWD versions was 1992 and according to others didn't have a automatic AWD until 1993. Yet this does look like a 1GA Laser RS from the profile with the painted Targa band, black beltline, no wing, and the Laser mesh wheels up front. Does it have popup headlights?

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Finding a good TCU can be difficult, the capacitors inside them leak just like with the ECU's but when they do, the corrosion eats into the voltage regulator and often dumps battery voltage on the 5v bus blowing up all the IC's. When you find a good working one, change the capacitors right away to keep it working.

i see but how can you explain me the tcu that maches my car following the guide is a md750092? and yes it does had the pop up headlights nevermind after looking so much im getting back where i started if the car that was made from the beginning turbo. and that he doesnt have turbo can i use a nonturbo tcu ? or eventually go bad for not been the matching one . im looking to save up money and find the part i need please guys help me out. Im not planning to put it turbo at the moment im gonna keep it up like that that is why i asked that type of question (yes im a girl that explains it all)

 

[steve]

I see.
How can you explain me the tcu that matches my car following the guide is a md750092?

Yes it does have the pop up headlights.

Nevermind, after looking so much I'm getting back where I started. If the car that was made from the beginning turbo and it doesn't have turbo can I use a nonturbo tcu? Will it eventually go bad for not been the matching one?

I'm looking to save up money and find the part I need. Please guys help me out. I'm not planning to put it turbo at the moment I'm gonna keep it up like that that is why I asked that type of question (yes I'm a girl that explains it all)

Being a girl has nothing to do with your ability to understand, you just don't have the experience, yet.

You can ignore most of my last post if you wish. I'm just trying to figure out what your car is so I can tell you what you need. It's not that uncommon to find a turbo DSM that has had a non-turbo engine put in it. Finding a AWD car with a non-turbo W4A22 automatic transmission is more unlikely, almost impossible.

It is interesting to see a car that otherwise shouldn't exist based on what I remember and other sources agree with. Since what you have, shouldn't exist, it gets more interesting trying to tell you which TCU you need.

So how did I come with MD750092?

I used the link Soccerguy136 posted http://www.dsmtuners.com/forums/articles-drivetrain/277172-1g-tcu-guide.html and noted that only 91 and 92 model year DSM's used the 3 connector TCU's and since the only AWD automatics came on turbo cars there was only one option, the list 90-92 AWD MD750092 TCU. But again, your car doesn't match my data so this is at best a educated guess.

 

[nydeli167]

Being a girl has nothing to do with your ability to understand, you just don't have the experience, yet.

You can ignore most of my last post if you wish. I'm just trying to figure out what your car is so I can tell you what you need. It's not that uncommon to find a turbo DSM that has had a non-turbo engine put in it. Finding a AWD car with a non-turbo W4A22 automatic transmission is more unlikely, almost impossible.

It is interesting to see a car that otherwise shouldn't exist based on what I remember and other sources agree with. Since what you have, shouldn't exist, it gets more interesting trying to tell you which TCU you need.

So how did I come with MD750092?

I used the link Soccerguy136 posted http://www.dsmtuners.com/forums/articles-drivetrain/277172-1g-tcu-guide.html and noted that only 91 and 92 model year DSM's used the 3 connector TCU's and since the only AWD automatics came on turbo cars there was only one option, the list 90-92 AWD MD750092 TCU. But again, your car doesn't match my data so this is at best a educated guess.

Let me put this simple im asking if the car can use a non turbo tcu and it doesnt make an transmission go lime because is not the matching one?

According to the data you were right it only has 2 differentials so is a fwd following the guide it is a MD750093. And to specify it my car has his original parts from the beginning only 2 parts missing are the turbo and original tcu besides that i made sure the parts are from the car thats why is important to find the answer of the question on tcu . Also why you asked about my pop up headlights?

 

[Bud92gsx]

Looks like a 3 plug tcu. < Me


So how did I come with MD750092? Steve

I used the link Soccerguy136 posted 1G TCU Guide and noted that only 91 and 92 model year DSM's used the 3 connector TCU's and since the only AWD automatics came on turbo cars there was only one option, the list 90-92 AWD MD750092 TCU. But again, your car doesn't match my data so this is at best a educated guess.



Please remove this if its too non tastefull.

[ame=http://www.youtube.com/watch?v=-twUCEfzrDk]Rush Hour - YouTube[/ame]

 

[nydeli167]

Looks like a 3 plug tcu. < Me


So how did I come with MD750092? Steve

I used the link Soccerguy136 posted 1G TCU Guide and noted that only 91 and 92 model year DSM's used the 3 connector TCU's and since the only AWD automatics came on turbo cars there was only one option, the list 90-92 AWD MD750092 TCU. But again, your car doesn't match my data so this is at best a educated guess.



Please remove this if its too non tastefull.

Rush Hour - YouTube

i must say one big detail the car has an automatic transmission

 

[Bud92gsx]

Yes same 3 plug tcu thats in my car.Like i have tried saying in multiple posts.

 

[nydeli167]

Yes same 3 plug tcu thats in my car.Like i have tried saying in multiple posts.

so it is a md75009????? what is yours ? i must be sure before i make the invesment

 

[Bud92gsx]

Went out with my flashlight just for you.

My 3 bolt tcu is md 750092.
Just like the part number Steve tracked down.

Your lucky I was feeling genorous today,and remembered you asked what my tcu part number was. Good luck

 

[nydeli167]

Went out with my flashlight just for you.

My 3 bolt tcu is md 750092.
Just like the part number Steve tracked down.

Your lucky I was feeling genorous today,and remembered you asked what my tcu part number was. Good luck

well thanks to have mercy on this woman tnx to all you
guys

 

[Bud92gsx]

Ahh just somedays I feel nice is all..Nothing to do with you being a woman.Although i do feel some good karma coming my way.

 

[Hug_the_retard]

I don't know if your issue was resolved, but I have a tcu that was purchased from the dealer and was in my car for around 6months before I did a engine and trans swap.. It wasn't in the list of tcu part numbers, but its part number MD737019 and it came out of a 1991 na eagle talon and its the three plug design..

 

[matt50317]

I swaped out my tcu and put in another one that a shop had laying around. I don't know if its for NA or a Turbo, but it works fine in my Turbo. So I'll say yes it'll work.

 

[steve]

According to the data you were right it only has 2 differentials so is a fwd following the guide it is a MD750093. And to specify it my car has his original parts from the beginning only 2 parts missing are the turbo and original tcu besides that i made sure the parts are from the car thats why is important to find the answer of the question on tcu . Also why you asked about my pop up headlights?

Since your car is actually FWD, not AWD, that explains everything that was giving me heartburn.

I also note that you didn't say in the thread that the car was an AWD. I picked that up from your profile, you might want to change it to avoid any additional confusion.

I asked about the popup headlights because it's the most noticeable change between the 90/91 and 92+ cars. What we call a 1Ga and a 1Gb version.

I see you found the right number for your year turbo automatic TCU, now to find a good one and don't forget to make sure that the capacitors have been replaced or you'll be looking for another far too soon.