93 transmission into a 90

Walters97Racing · May 2nd, 2011, 07:25 PM

okay, so we have a job in our shop were doing for a friend. he doesnt have much money so hes doing this as cheap as possible. we have a 93' transmission. everything is fine except the 3 prong plug in the 93' transmission. the 90' transmission had a 2 prong plug. the plug is for the overdrive. what do we have to do to make this work?

OHC230 · May 2nd, 2011, 09:42 PM

I think that swapping the 90' 3-4 shift solenoid into the 93’ transmission is the best way to remedy this problem. Hopefully the old solenoid is still good.

zonker · May 2nd, 2011, 10:25 PM

Upon looking at EEC diagrams, the 90's harness wires are red (VREF 5 volts) and Orange w/ yellow stripe (EEC #52 signal return).

If you look at the 3 terminals on the trans, they make a triangular pattern. Looking at the terminals, with the center terminal oriented as the topbof the triangle, that center terminal is the red VREF wire, and the CCO terminal #53 wire is to the right. I think you'd leave the terminal to the right un-connected.

that's my best guess anyways.

May 2nd, 2011, 07:25 PM	#1
Walters97Racing Enthusiast 1996 Mustang 3.8l Join Date: Mar 2010 Location: Maryland Posts: 503 iTrader: 0 reviews	93 transmission into a 90 okay, so we have a job in our shop were doing for a friend. he doesnt have much money so hes doing this as cheap as possible. we have a 93' transmission. everything is fine except the 3 prong plug in the 93' transmission. the 90' transmission had a 2 prong plug. the plug is for the overdrive. what do we have to do to make this work? __________________ 96 v6 - needs v8 03 Roush - needs turbo 06 F250 6.0 - needs stepladder

May 2nd, 2011, 09:42 PM	#2
OHC230 Enthusiast Supercharged 89'/ 85' SVO 11.945 @ 119.6 Join Date: Jan 2010 Location: Napa Valley CA Posts: 879 iTrader: 0 reviews	I think that swapping the 90' 3-4 shift solenoid into the 93’ transmission is the best way to remedy this problem. Hopefully the old solenoid is still good. __________________ Supercharged 2.7L 398 HP 501 ft lb !!

May 2nd, 2011, 10:25 PM	#3
zonker Enthusiast 1991 Mustang LX 2.3 Join Date: Sep 2010 Location: Temecula, CA Posts: 660 iTrader: 0 reviews	Upon looking at EEC diagrams, the 90's harness wires are red (VREF 5 volts) and Orange w/ yellow stripe (EEC #52 signal return). If you look at the 3 terminals on the trans, they make a triangular pattern. Looking at the terminals, with the center terminal oriented as the topbof the triangle, that center terminal is the red VREF wire, and the CCO terminal #53 wire is to the right. I think you'd leave the terminal to the right un-connected. that's my best guess anyways. __________________ Rob 1987 Mustang 2.3 LX Convert (T5) project 2.5 N/A HP 1991 Mustang 2.3 LX Convert (A4LD) 1992 Mustang 2.3 LX Convert (A4LD) 41.52 mpg!! 1994 Capri XR2 1.6 Turbo Convert 1999 ZX2 S/R 2.0 Coupe http://zxtuner.com Last edited by zonker; May 2nd, 2011 at 10:30 PM.

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