• Mustang Forums
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  • 2.3L (N/A & Turbo) Tech

A4LD Wiring help

  • Thread starter Thread starter 01PONY
  • Start date Start date Apr 2, 2011
0

01PONY

Founding Member
Jun 26, 2002
104
0
17
Long Island, NY
Apr 2, 2011
#1
  • Apr 2, 2011
  • #1
I put an A4LD from a 1989 LX into a 1991 LX, both 4 cyls. The problem is that the '01 had a 3 wire plug and the '89 trans has a 2 wire plug. The plug can't be changed easily. I believe the plug is for the overdrive and/or lockup being the car now only has 3 gears and no overdrive. I want to know if I can splice the 2 wires from the trans into the 3 wires on the car and which would go to which to get the overdrive working. Thanks.
 
D

Delray Dude

New Member
Jul 7, 2010
263
1
0
Apr 5, 2011
#2
  • Apr 5, 2011
  • #2
not sure - all i have is manual cars. but i remember reading somewhere that if you have the old transmission you can get the wiring harness from it and it wires up into the older case - i'll see if i can fine the thread on it.
 
I

Ironrider09

New Member
Apr 10, 2011
1
0
0
Apr 10, 2011
#3
  • Apr 10, 2011
  • #3
I have the same sort of problem but I swapped in a manual transmission and the computer spits out codes for the automatic and I would like to prevent those codes from setting the check engine light on
 
K

KhanTyranitar

Member
Apr 21, 2011
93
1
9
Apr 23, 2011
#4
  • Apr 23, 2011
  • #4
If you swap in a manual, I hear you can wire some resisters in to simulate the load of the solenoids. Just measure the resistance of the solenoids, then go for a high wattage rated resistor of the same amount.

As far are using an A4Ld, I would swap the wiring, myself, I don't like doing swaps, would much rather rebuild the old one. The biggest problem with swaps is that each year, Ford did have minor design changes to improve the durability and reliability. If you put a trans from and older year into a newer year, you are downgrading to a less reliable unit. If it were mine, I would go for a 1994 A4LD with the 4.0L planetary gears, that is if I did a swap. I'm still personally in favor of rebuilding the old one with upgrade parts.
 
You must log in or register to reply here.

Similar threads

C
Electrical HELP! 1989 5.0 Stick, Voltage Bleed onto Ignition Trigger wire
  • ChickenDeluxe
  • May 14, 2026
  • Fox 5.0 Mustang Tech
Replies
7
Views
129
Fox 5.0 Mustang Tech May 24, 2026
ChickenDeluxe
C
1
Electrical Headlight harness trouble
  • 1985fox
  • Apr 14, 2026
  • Fox 5.0 Mustang Tech
Replies
7
Views
188
Fox 5.0 Mustang Tech Apr 17, 2026
AeroCoupe
Electrical 91 hatch wiring help needed
  • FastDriver
  • Apr 7, 2026
  • Fox 5.0 Mustang Tech
Replies
2
Views
129
Fox 5.0 Mustang Tech Apr 8, 2026
FastDriver
A
Resolved Electrical Help Please
  • Alabama
  • Jan 22, 2026
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
Replies
2
Views
241
1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- Jan 22, 2026
AeroCoupe
A
Electrical electric mirror switch issue...
  • alchemist1
  • Apr 18, 2026
  • Fox 5.0 Mustang Tech
Replies
1
Views
92
Fox 5.0 Mustang Tech Apr 19, 2026
2000xp8
Share:
Bluesky Email Share Link
  • Mustang Forums
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  • 2.3L (N/A & Turbo) Tech
Menu
Log in

Register

  • Forums
  • What's new
  • Media
  • Resources
  • Contact
  • Sponsor
X

Privacy & Transparency

We use cookies and similar technologies for the following purposes:

  • Personalized ads and content
  • Content measurement and audience insights

Do you accept cookies and these technologies?

X

Privacy & Transparency

We use cookies and similar technologies for the following purposes:

  • Personalized ads and content
  • Content measurement and audience insights

Do you accept cookies and these technologies?