Do I need to re-wire my mustang?

stangdude · June 14th, 2008, 11:08 PM

I have replaced my worn out A4LD transmission with a good used one. Unfortunately, the car will not start now. I found out that orig. transmission was a 3-wire valve body plug and the new one is a 2-wire; that combination does not work with current computer. Do I need to re-wire and add new computer, or is there a 3-wire to 2-wire conversion? Also, is there an engine wiring diagram available?

TurboLX · June 14th, 2008, 11:47 PM

what tranny did you replace the a4ld with?

stangdude · June 16th, 2008, 12:19 AM

I replaced the tranny with another a4ld, that was a 2-wire instead of a 3-way like the original. Any suggestions would be greatly appreciated.

TurboLX · June 16th, 2008, 07:22 AM

do you know what year and car the other A4LD came from?

stangdude · June 16th, 2008, 09:03 AM

my car is a1991 the tranny is from a 1990 . i think ford change over to a coilpack in 91

TurboLX · June 16th, 2008, 09:08 AM

yes they did, so its different ecu

best bet is to find an A4LD for taht year car

coffinator6 · June 16th, 2008, 09:58 AM

is ther any way to swap the valve body for one with 3 plugs? that would seem to be the easiest fix to me besides getting a new trans for the right year.

June 14th, 2008, 11:08 PM	#1
stangdude Newbie Join Date: Jun 2008 Posts: 3 iTrader: 0 reviews	Do I need to re-wire my mustang? I have replaced my worn out A4LD transmission with a good used one. Unfortunately, the car will not start now. I found out that orig. transmission was a 3-wire valve body plug and the new one is a 2-wire; that combination does not work with current computer. Do I need to re-wire and add new computer, or is there a 3-wire to 2-wire conversion? Also, is there an engine wiring diagram available?

June 14th, 2008, 11:47 PM	#2
TurboLX I Post Entirely Way Too Much 1988 Mustang LX Turbo Join Date: Oct 2006 Location: NY Posts: 8,778 Blog Entries: 1 iTrader: 0 reviews	what tranny did you replace the a4ld with? __________________ 1988 LX Coupe 2.5L, GT35R, 44mm WG, 32psi, C16.

June 16th, 2008, 07:22 AM	#4
TurboLX I Post Entirely Way Too Much 1988 Mustang LX Turbo Join Date: Oct 2006 Location: NY Posts: 8,778 Blog Entries: 1 iTrader: 0 reviews	do you know what year and car the other A4LD came from? __________________ 1988 LX Coupe 2.5L, GT35R, 44mm WG, 32psi, C16.

June 16th, 2008, 09:08 AM	#6
TurboLX I Post Entirely Way Too Much 1988 Mustang LX Turbo Join Date: Oct 2006 Location: NY Posts: 8,778 Blog Entries: 1 iTrader: 0 reviews	yes they did, so its different ecu best bet is to find an A4LD for taht year car __________________ 1988 LX Coupe 2.5L, GT35R, 44mm WG, 32psi, C16.

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June 16th, 2008, 12:19 AM	#3
stangdude Newbie Join Date: Jun 2008 Posts: 3 iTrader: 0 reviews	I replaced the tranny with another a4ld, that was a 2-wire instead of a 3-way like the original. Any suggestions would be greatly appreciated.

June 16th, 2008, 09:03 AM	#5
stangdude Newbie Join Date: Jun 2008 Posts: 3 iTrader: 0 reviews	my car is a1991 the tranny is from a 1990 . i think ford change over to a coilpack in 91

June 16th, 2008, 09:58 AM	#7
coffinator6 Enthusiast 03 GT, 92 coupe 2.3T Join Date: Feb 2007 Location: Choctaw. Oklahoma Posts: 975 iTrader: 3 reviews	is ther any way to swap the valve body for one with 3 plugs? that would seem to be the easiest fix to me besides getting a new trans for the right year.

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