Okay, I bought a 140MPH speedo from a dude online, and its on its way now. I would like to have al lthe stuff ready when it gets here. Heres my questions:

1.) I know I need a VSS, but a.)will it bolt right in to my tranny b.) will and f-body VSS or even any GM VSS work, or do I need one for 3.23 gears?

2.) I know there is a D/A convertoer module by the ECM, but does it have anything to do with the ECM? Can i just swap it?

3.) Will the cluster wire up correctly to the dash? There is a printed circuit on the back that plugs into the dash. Will all of my lights and gauges work correctly? Ill re-wire this **** if I have to.

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1983 Firebird
TH700R4 Auto
Small Block 400
LG4 ECM, Intake, Carb, Distributor, etc.
Soon to be non-computer.
Clarion Head Unit 45X4
2 Pioneer 400W 12" Subs
Third Gen Performance
"A four cylinder is half an engine."

 

^^^btt^^^

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1983 Firebird
TH700R4 Auto
Small Block 400
LG4 ECM, Intake, Carb, Distributor, etc.
Soon to be non-computer.
Clarion Head Unit 45X4
2 Pioneer 400W 12" Subs
Third Gen Performance
"A four cylinder is half an engine."

 

Look for a link on the 'tech' page in my sig...that will tell you how to hook it up; the only question is, will the cluster fit your stock dash? I'm not sure how much things changed between the 82-84 dash and those from later years....

Pete

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Pete's Place
HiOutput Tech Page
83 SC
originally a V6...now
206+k mile LG4/5-speed
14.935@94.14

 

You need to pull the old Speedo cable connection in the transmission and count the teeth, then go and get a VSS with the same # of teeth. I know at the dealer they are quite pricey. Your ECM doesn't support an electronic speedo, and if I remember correctly the electronic speedo doesn't even use the ECM, but a piggybacked speed buffer like the one that Pete describes on his page. I know this because a guy in our club here has an 86 carbed T/A that has the 140mph electronic speedo and he has no ECM and it works fine.

By the way, last time I checked that little yellow speed buffer was about $45 at the dealer.

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Kevin Irving
85 Trans Am WS-6, 305 TPI, custom burned '86 PROM with '87 "165"ECM, Accel Supercoil & 8.8 Wires, Rapidfire #2 @ .055", MSD 6AL, 1.6:1 Roller tipped rockers, Homemade AFPR, K&N cone, no airbox, Aluminum Driveshaft, Wonderbar, TB Coolant Bypass, Ported Plenum, Descreened MAF, Syclone Fuel Pump, JET Airfoil, Mobil 1 synth in all but transmission.

15.556 @ 86.65mph, Nov 10, 2000.... I know it sucks.. but it will get better!

http://www.geocities.com/transam85tpi/

Member - The Tidewater Trans Am Club, Norfolk VA http://www.geocities.com/ttacva/