Swapping 1990 Bronco 2 automatic transmission to one out of 1992 explorer 4x4

[Ozzy468]

Good afternoon all. My friend took out his factory 1990 bronco 2 transmission in favor for one out of a 1992 explorer. This goes from 1 to 2 solenoid controlled sifting. Do I need to swap valve bodies??? Wiring ideas are much appreciated. Thank you!!!

 

[franklin2]

Looks like you need a different computer setup and harness or you won't have a 3-4 shift. This is from the AL4D transmission article in the tech section.

Best I can tell from ATSG manual, the changeover date for single to dual solenoid versions occurred in mid '88 The single solenoid originally on the trans 85-87 controls only the TC lockup function. Later models had the 3-4 shift inhibit solenoid added in 88. And I have both a 90 2.9 A4LD and a 93 Explorer A4LD here, both have the dual solenoid setup.

 

[RonD]

Welcome to TRS

The A4LD automatic should have 2 solenoids from 1988/9 and up

And 1990 B2 computer should be programmed to use 2 solenoids

3 wire connector = 2 solenoids
2 wire = 1 solenoid

So have a look

A4LD PDF here, shows the plug ins: https://www.explorerforum.com/forums/media/a4ld-specification-chart-from-transgo.39537/full

Transmission and computer need to be on the same page as far as solenoids

 

[franklin2]

In the link below, the guy replying alludes to the fact you may be able to change out the valve body.

86 A4LD swapped into 88 ranger- need some wiring help for the t/c lock up switch. - Ford Truck Enthusiasts Forums

Clutch, Transmission, Differential, Axle & Transfer Case - 86 A4LD swapped into 88 ranger- need some wiring help for the t/c lock up switch. - I removed a A4LD transmission from a 86 ford ranger and i installed it in my 88 ford ranger 4x4. Everything went good till i noticed one harness was...

www.ford-trucks.com

 

[Ozzy468]

Looks like you need a different computer setup and harness or you won't have a 3-4 shift. This is from the AL4D transmission article in the tech section.

Best I can tell from ATSG manual, the changeover date for single to dual solenoid versions occurred in mid '88 The single solenoid originally on the trans 85-87 controls only the TC lockup function. Later models had the 3-4 shift inhibit solenoid added in 88. And I have both a 90 2.9 A4LD and a 93 Explorer A4LD here, both have the dual solenoid setup.

Thank you

 

[Ozzy468]

Thank you to all who helped!

Good afternoon all. My friend took out his factory 1990 bronco 2 transmission in favor for one out of a 1992 explorer. This goes from 1 to 2 solenoid controlled sifting. Do I need to swap valve bodies??? Wiring ideas are much appreciated. Thank you!!!