Hey guys, I am rebuilding a spare 2.8 V6 engine for a school project. It had an auto tranny attached but I will likely be using my existing 4 speed manual with it when I swap it in. Is the auto wiring harness the same as the manual other than the wires that go into the auto tranny? Or will I have to re-use my existing 4spd harness?

------------------
My Fiero: 1986 Pontiac Fiero GT, V6, 4-speed manual

C500 has a pin you will need to move:
E2 is the starter on a manual transmission
A4 is the starter on an automatic transmission

So you will need to move C500 pin A4 to pin E2 if you are using an auto harness on a manual car.

------------------
-Brian

My 87 GT Poly Suspension Upgrade (all pics) thread
Removing the roof panel
My HUD install thread
Modified stock air canister and base to 3.5 inch for 3800na

I would say just use the manual harness already in the car, and correctly pinned, and sell the auto harness.

Don't forget the back up light circuit......

Sounds like it will indeed require some modification... I'll just use my manual one. Will likely post the auto harness up for sale in the mall soon. Thanks!

------------------
My Fiero: 1986 Pontiac Fiero GT, V6, 4-speed manual

quote Originally posted by dobey: I would say just use the manual harness already in the car, and correctly pinned, and sell the auto harness.

As long as he makes the connection to the TCC, that should work fine.

------------------
" THE BLACK PARALYZER" -87GT 3800SC Series III engine, custom ZZP /Frozen Boost Intercooler setup, 3.4" Pulley, Northstar TB, LS1 MAF, 3" Spintech/Hedman Exhaust, Autolite 104's, MSD wires, Custom CAI, 4T65eHD w. custom axles, HP Tuners VCM Suite.
"THE COLUSSUS"
87GT - ALL OUT 3.4L Turbocharged engine, Garrett Hybrid Turbo, MSD ign., modified TH125H
" ON THE LOOSE WITHOUT THE JUICE "

quote Originally posted by Dennis LaGrua: As long as he makes the connection to the TCC, that should work fine.

There is no TCC in a manual car.

My standard swaped 3.4 is using an auto harness with the prnd21 switch left in neutral position, column neutral safety switch left in neutral position, and extended speed sensor wires.