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Old 11-14-2012, 05:41 PM   #1
WarShrike
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Default Speedometer calibration on my T-56 conversion...

Kinda confused about the whole speedometer tables and stuff, figured I'd post up and then add the proper things to my Write up.

Okay, I have a T-56 swap and want to make sure I have the trans settings as close as possible.

I have a GTO T-56 so the ratios are:
2.97/2.07/1.43/1.0/.84/.63

For my car, I have a 3.42 rear gear and running 275/40/R17s for tires.
What all do I need to change on the speedometer tables? This is running a PCM flashed with the T-5 tables from the dealer.

Current settings are:
Code:
General
VSS Pulses Per
Mile:  43700
Rev - Trans  10.5703
Final Drive Ratio
Drive Sprocket Ratio   0.000
Trans Revolutions/Mile   0.000
 
Gear/Tire Calc
Current: 7.85
Auto Scale Transmission Tables: Yes
FWD: No
GTO Tables look like this:
Code:
General
VSS Pulses Per
Mile:  47992
Rev - Trans  40.0000
VSS Output Pulses Per
Mile:   10020
Mile - ABS:   128000
Final Drive Ratio
Drive Sprocket Ratio   3.46
Trans Revolutions/Mile   2448.5741
 
Gear/Tire Calc
Current:
Tire Size: 24.72
Gear Ratio: 3.46
Auto Scale Transmission Tables: Yes
FWD: No
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Old 11-14-2012, 05:50 PM   #2
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All you really have to change is the gear ratio. Figure it up and put in whatever makes it right.
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Old 11-15-2012, 05:33 PM   #3
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Got it. Almost have it dialed in now.
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