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4.0 swap quick question

stevealvey24

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Vehicle Year
1986
Make / Model
Ford
Engine Size
2.9
Transmission
Automatic
So I'm doing the swap later this month. Will take pics. But got a quick question. Is the 4r55e controlled by a rec iv computer in its earlier state? If so what do yall think about keeping the rec iv stuff but going to a 4r55e instead of the a4old. Using the wiring harness from like a 1994 in my truck? Any thoughts?
 


adsm08

Senior Master Grease Monkey
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Ford Technician
TRS 20th Anniversary
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Location
Dillsburg PA
Vehicle Year
1987
Make / Model
Ford
Engine Type
4.0 V6
Engine Size
4.0
Transmission
Manual
2WD / 4WD
4WD
Tire Size
31X10.50X15
The 4R transmissions started in 95. You'd need the proper year harness and computer to run the trans properly because of the different level of electronic control.

It really is a glorified A4LD, but the valve bodies are different.
 

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