Auto to Manual Trans???

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Craig96

New Member

Jun 6, 2011

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Jun 6, 2011

#1

• Jun 6, 2011

• #1

I just finished installing a 5spd Maual trans in my 1996 Mustang GT. The tranny came out of a 1996 Saleen. My problem is know the check engine light flashes with nothing but transmission codes and the Over Drive light flashes of course. Can anyone tell me how to fix this? I have heard everything from having to change just the computer to having to change the ignition switch insterment cluster and computer from a donor car that has the same set up I have now! What is the real facts on how to fix this problem? HELP it's driving me nuts. The car seems to run and idle ok. But I want the job to be done right. I can be reached at CSHogberg@aol.com THANKS FOR THE HELP!!!

 

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FlMuPhi198

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Jan 11, 2011

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Jun 6, 2011

#2

• Jun 6, 2011

• #2

Are the dashes the same? Like the lights?

 

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Craig96

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Jun 6, 2011

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Jun 6, 2011

#3

• Jun 6, 2011

• #3

the saleen dash is gone but the only differance I believe is that it went to 180mph

 

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007

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Jan 29, 2002

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Jun 8, 2011

#4

• Jun 8, 2011

• #4

I am doing the same swap. As far as I can tell you need a 5 speed ECU flashed for your car by Ford. did you also install the manual trans wiring harness? Its different from the auto harness.

 

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Craig96

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Jun 6, 2011

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Jun 8, 2011

#5

• Jun 8, 2011

• #5

Which harness do you mean? I installed a jumper wire for the N/S switch and I installed the small harness for back up lights. Thanks for your feed back. I have been told that you can go into the original PCM and just chang the AUTO TRANS LOAD=6 if you change the 6 to a 0 that will disable the auto trans functions. Any good tuner or Ford dealer can do this I'm told. I contacted my local ford dealer and the Tech that does most of the PCM work was on a road test I'm waiting for a call back to see if this can be done. Again THANKS for the feedback and look forward to any one else that can shed some light on this question

 

18Dmedic

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Jun 11, 2011

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Omar's Tittie Taverna & Grille - Deh Rawod

Jun 11, 2011

#6

• Jun 11, 2011

• #6

From what I have experienced from tranny swaps in the past, you have to get the tuning adjusted by someone who knows what they're doing and you should be good to go. That's what we did for my autocross car. And I had no other issues.

 

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007

Founding Member

Jan 29, 2002

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Jun 11, 2011

#7

• Jun 11, 2011

• #7

Craig96 said:

Which harness do you mean? I installed a jumper wire for the N/S switch and I installed the small harness for back up lights. Thanks for your feed back. I have been told that you can go into the original PCM and just chang the AUTO TRANS LOAD=6 if you change the 6 to a 0 that will disable the auto trans functions. Any good tuner or Ford dealer can do this I'm told. I contacted my local ford dealer and the Tech that does most of the PCM work was on a road test I'm waiting for a call back to see if this can be done. Again THANKS for the feedback and look forward to any one else that can shed some light on this question

Click to expand...

Where did you get the small harness you talk about, and also where did you find the wiring diagrams to know which pins to jumper?

I was planning on buying the manual trans harness. Theres an auto or manual version. It plugs into the main engine harness at two points.

I think the manual version is part number 15525 and auto is 7C7078 but Im not used to reading these drawings... See attached pdf. Maybe you can help me work out exactly what I need to do here...

 

Attachments

• GTTrannyHarness.pdf

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rockyracoon

10 Year Member

Nov 23, 2005

874

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margate NJ

Jun 15, 2011

#8

• Jun 15, 2011

• #8

get a manual car puter or turn off the auto trans function with a tuner.

if you have a 96 you can swap computers without having to reprogram your key since pats is in the dash on the 96 model years, at least on the GTs it is.

 

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rockyracoon

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Nov 23, 2005

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margate NJ

Jun 15, 2011

#9

• Jun 15, 2011

• #9

oops double post

 

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007

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Jan 29, 2002

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Jun 16, 2011

#10

• Jun 16, 2011

• #10

Rocky: Did you swap the trans harness as I mentioned above?

 

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rockyracoon

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Nov 23, 2005

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margate NJ

Jun 16, 2011

#11

• Jun 16, 2011

• #11

Yes I did. plug n play. Got it off of e-bay for 20 bux or so.

 

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007

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Jun 16, 2011

#12

• Jun 16, 2011

• #12

Thanks!

Getting my local tuner to flash the ECU might be a pain. The car wont even start with the auto ECU in place, so its not like I can drive it there after doing the trans swap. I'll get a quote from the dealer for flashing a 5 speed ECU with my PATS and mileage etc.