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A4LD Transmission Swap - making a 2-wire transmision work in a 3-wire car...

  • Thread starter Thread starter SteveInPhx
  • Start date Start date Oct 23, 2010
S

SteveInPhx

New Member
Sep 7, 2010
7
0
0
Phoenix, Az
Oct 23, 2010
#1
  • Oct 23, 2010
  • #1
I have a 1990 2.3L Mustang LX Convertible. Recently my A4LD transmission went out. I purchased another A4LD transmission.

I have installed the replacement A4LD, which has only a 2-wire setup on it (for shifting from 3rd to overdrive).

The blown up transmission had a 3-wire set up (from what I have read, controls shifting from 2nd to 3rd, and shifting from 3rd to overdrive).

Is there any way of getting the overdrive on the 2-wire transmission to work with my 3-wire car?
I had read someplace that it was possible to splicing wires together could make a 3-wire transmission work with a 2 wire car, but whether or not that is true, I dont know...

The fastest road I drive is only 45 mph. I realized at the time I installed the replacement I would be without overdrive initially. I also figured I would lose some fuel economy, but needing the car to get back and forth to work as soon as possible, I went ahead and installed it.


It shifts fine first 1st through 3rd gear, just no overdrive.
 

rd

Founding Member
Jan 12, 2000
3,316
63
109
Ocean Springs MS
Oct 24, 2010
#2
  • Oct 24, 2010
  • #2
Have not heard that you can swap the 2 and 3 solenoid trans. I did exactly what you are doing to my 89 about 5 years ago, but got lucky and got another 2 solenoid trans.

I bought the ATSG books on the A4ld, and determined it was more trouble than I wanted to go to to change. Not sure you can even swap valvebodies either.
 
D

Delray Dude

New Member
Jul 7, 2010
263
1
0
Oct 25, 2010
#3
  • Oct 25, 2010
  • #3
Not familiar with the auto transmissions, but..

check out this from another forum - I think the problem solution you are looking for start around post #25 and up

89 2.3/A4LD Wiring question, please help.. - Corral.net : Ford Mustang Forums
 
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