T56 Computer in A4 Car

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Mar 29, 2008 | 11:23 AM

Bull

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From: Amherst, MA

T56 Computer in A4 Car

I have most of my parts together to do my A4-T56 swap.

I've done some research here, and see that after the swap, I need to do something with my PCM so the car's computer is not confused by the new trans.

I can get a computer from a '95 T56 car for $75. Can I install this in my car with no issues? Do the computers carry vin data or anything?

I know the other option is a reflash, but swapping a computer out sounds pretty easy to me.

Thanks for any help.

Dave

Mar 30, 2008 | 08:07 AM

Bull

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Wow, no one knows if you can put a T56 computer in an A4 car instead of having your A4 PCM modified?

Mar 30, 2008 | 09:21 PM

wrencher

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You can put a 4L60E A4 calibration in the PCM. The wiring harness/wiring to the trans has to be intact for it to function of course.

Mar 30, 2008 | 09:24 PM

Bull

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Quote:

Originally Posted by wrencher

You can put a 4L60E A4 calibration in the PCM. The wiring harness/wiring to the trans has to be intact for it to function of course.

Thank goodness for a response

lol

Not sure I understand it, though. My car is an A4. I am swapping to a T56, but I know that will throw off the speedo and have driveability issues. I know people get their PCMs reflashed for this.

But I have access to an entire computer from a T56 car of the same year...can I just swap computers?

Maybe I am not explaining my question well?

Mar 30, 2008 | 11:50 PM

wrencher

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Aaah I mis read it lol. You can put a T56 calibration in it. look at the thread at the top of the forum that is sticky'd for A4 to t56 conversions.
https://ls1tech.com/forums/manual-transmission/200480-m6-a4-a4-m6-conversion-info-requested.html
You have to wire the car for the trans reflash the PCM & then your all set!

Last edited by wrencher; Mar 30, 2008 at 11:51 PM. Reason: additions

Mar 30, 2008 | 11:59 PM

Bull

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Quote:

Originally Posted by wrencher

Aaah I mis read it lol. You can put a T56 calibration in it. look at the thread at the top of the forum that is sticky'd for A4 to t56 conversions.
https://ls1tech.com/forums/showthread.php?t=200480
You have to wire the car for the trans reflash the PCM & then your all set!

lol, thank you.

I spent a lot of time reading through that conversion sticky already. That's where I learned about the need to reflash the PCM.

Your most recent answer here makes it seem as though I STILL need to reflash the PCM even if I use a T56 computer, correct? That part is confusing me...maybe because I don't fully understand the role of the PCM within the computer of the car...?

I do know about the various wiring chores that must be done for the harness as well.

Mar 31, 2008 | 12:06 AM

Turnin20s

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It might be cheaper to do the reflash. Just pull the comp out when you start the swap and it will be back in a few days. And I don't think they are any driveability issues, just the speedo being way off, but I could be wrong.

Good luck with the swap, I should be starting mine soon

Edit* check out ebay for the pigtails that you will need. They are alot cheaper than GM and are probably made by the same place