im wanting to get rid of my harness im puttting in a 383 and i am wanting to clean up the engine compartment if i pull the computer and the wires that go with it will i loose any gauges or mess up the auto trans also i bought a different gauge cluster off ebay it has a 120 mph speedo 90 psi oilgauge 8000 tach i have in it now a 140mph speedo 6000 tach and 60psi oil gauge will the new ones just plug in and work or do i need to change anything i plan to post pics of my project

 

The torque converter lock-up signal is bundled with the ECM harness. If you're taking the ECM out, you're going to have to do something about the lock-up anyway, so that's about the only thing your'e going to have to address.

No problems with the rest of the stuff you mentioned.

 

Hey five7,

1) What will happen if the lockup signal is not there?

2) What would you do to supply it?

thanks,
Franchise

 

The cluster you bought is a V6 cluster, you will have to run a V6 sending unit to make the oil pressure read right, and the tach will run off a different pulse width and will read wrong.

 

The transmission is designed for lockup in cruise situations. Without the lockup, you'll build up heat that will damage your 3-4 clutch pack.

The lockup operation is fairly simple. The factory powered the solenoid through the brakelight switch (brake off, power on). The lockup is commanded by the ECM by providing a ground to complete the circuit. The options available are to: ground the circuit with a manual switch; use a single-pole, normally open pressure switch in the 4th gear pressure port and route the solenoid ground wire to it instead of back through the harness (grounds the solenoid when the tranny shifts to 4th gear OD); get a kit that provides the switches and harnesses to do the job, typically includes a vacuum switch to disengage the lockup in high load situations.

You need to be aware of what type solenoid you have. Most of the f-body transmissions I've heard of have a 2-wire solenoid, but I came across an '83 transmission, origin unkown but probably not f-body, that has a single wire solenoid - meaning it is grounded through the case, and engages when power is applied. Completely different than my '86 f-body TH700. However, the '83 system will be nice when the transmission goes in my non-computerized '57...

 

is there anyway i can run this tach with my v8

 

Not that one without an adapter which costs more than finding and buying an 8k tach with a 5500 RPM redline which came in the GTA and Trans Am's with the L98

 

thanks for the info five7.

I will enlist your knowledge again after i finish the fuel tank swap.

Franchise

 

ok how much is this adapter and do you have a part # also will the v6 oil sending unit fit inthe same place as the v8

 

is there an after market tach that matches theese in the trans am