at least tell me if a 87 ecm controls my speedometer and vss
Supreme Member
Joined: Jul 1999
Posts: 1,577
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From: Baton Rouge, LA, USA
Car: 87 T/A
Engine: 441 SBC 12.5:1 0.680" Lift
Transmission: T-56
Axle/Gears: 4.10 TruTrac Moser 9"
Nope, the VSS signal goes through the dash for display, and into the ECM as an input to control other parameters like TCC. If you're angling toward whether a gear change will require speedo/VSS/tranny changeup, the answer is yes.
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