C-4 swap

john_86stang · 02-04-2001, 07:33 PM

I am in the process of putting a C-4 in my 86 GT. How can I hook the kickdown up to my C-4. The car was equipped with a T-5. Also, there were about 2-3 plugs that went into the old T-5. They're purpose is?????? Also I have not found a Check Engine light on this car, were 86 GT's equipped with them?
Any help would be greatly appreciated.

------------------
John Welch
86 GT, 3.73's, H-pipe, No smog pump, pulleys, K&N, and still going.

Capri306 · 02-05-2001, 08:07 PM

No check engine light on the '86GT, or my '87Notch for that matter.

Hooking up the "kickdown" cable will be difficult, since that's not what it is. It's actually called the throttle valve (TV) cable, and the AOD uses it to change shift points AND shift characteristics. On a C4, it's a true kickdown rod for downshifting, and that's going to be the tricky part, since you need it to "hit" when the throttle is open far enough, another reason you see C-series trannies on carbed and TBI cars. As far as making all of this work, I haven't a clue. Seems like you should be able to hook up some sort of bracketry and trim the cable some way. Remember you need that kickdown lever on the C4 to be full down at WOT. Good luck.

------------------
Capri306, Moderator, The Mustang Works Online
1979 Mercury Capri, 5.0L -- C4 -- 2.73
1987 Mustang LX Notch

<--- New Timeslips

[This message has been edited by Capri306 (edited 02-05-2001).]

93CobraR · 02-05-2001, 08:12 PM

One of the old wires is for the back up lights. Have no clue what the others are for.

------------------
87 GT, 4 inch cowl hood,17x9 Cobra R's/255/45's,GT-40 heads,long tubes headers,h-pipe,Flows,BBK cold air, Mass air,70mm MAF, 1.7's, 1" spacer,underdrive pulleys,Pro 5.0, King Cobra, Adj. fuel Reg., Lakewood Lift Bars,50/50's,subframes, 4.10's.
Best time 13.012
Best MPH 104
Best 60' 1.816

Visit my site at:
http://www.geocities.com/cobrar93_2000/MyPage.html

john_86stang · 02-09-2001, 12:21 AM

Anybody know which of the wires(that plugged into the T-5) were for the starter relay.(when you push the clutch in) Is there a book available that shows good drawings of the electrical system? Thanks

02-04-2001, 07:33 PM	#1
john_86stang Registered Member Join Date: Jan 2001 Location: Crossett, Arkansas USA Posts: 45	C-4 swap I am in the process of putting a C-4 in my 86 GT. How can I hook the kickdown up to my C-4. The car was equipped with a T-5. Also, there were about 2-3 plugs that went into the old T-5. They're purpose is?????? Also I have not found a Check Engine light on this car, were 86 GT's equipped with them? Any help would be greatly appreciated. ------------------ John Welch 86 GT, 3.73's, H-pipe, No smog pump, pulleys, K&N, and still going.

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02-05-2001, 08:07 PM	#2
Capri306 Moderator Join Date: Sep 1998 Location: Grand Rapids, Michigan, USA Posts: 1,001	No check engine light on the '86GT, or my '87Notch for that matter. Hooking up the "kickdown" cable will be difficult, since that's not what it is. It's actually called the throttle valve (TV) cable, and the AOD uses it to change shift points AND shift characteristics. On a C4, it's a true kickdown rod for downshifting, and that's going to be the tricky part, since you need it to "hit" when the throttle is open far enough, another reason you see C-series trannies on carbed and TBI cars. As far as making all of this work, I haven't a clue. Seems like you should be able to hook up some sort of bracketry and trim the cable some way. Remember you need that kickdown lever on the C4 to be full down at WOT. Good luck. ------------------ Capri306, Moderator, The Mustang Works Online 1979 Mercury Capri, 5.0L -- C4 -- 2.73 1987 Mustang LX Notch <--- New Timeslips [This message has been edited by Capri306 (edited 02-05-2001).]

02-05-2001, 08:12 PM	#3
93CobraR Registered Member Join Date: Oct 1999 Location: Cincinnati, Ohio Posts: 1,575	One of the old wires is for the back up lights. Have no clue what the others are for. ------------------ 87 GT, 4 inch cowl hood,17x9 Cobra R's/255/45's,GT-40 heads,long tubes headers,h-pipe,Flows,BBK cold air, Mass air,70mm MAF, 1.7's, 1" spacer,underdrive pulleys,Pro 5.0, King Cobra, Adj. fuel Reg., Lakewood Lift Bars,50/50's,subframes, 4.10's. Best time 13.012 Best MPH 104 Best 60' 1.816 Visit my site at: http://www.geocities.com/cobrar93_2000/MyPage.html

02-09-2001, 12:21 AM	#4
john_86stang Registered Member Join Date: Jan 2001 Location: Crossett, Arkansas USA Posts: 45	Anybody know which of the wires(that plugged into the T-5) were for the starter relay.(when you push the clutch in) Is there a book available that shows good drawings of the electrical system? Thanks