gm 8.5"
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Calibrating speedometer.
I recently replaced my 3.08 gearing to 3.42 on my 8.5" and since then my speedo is out to lunch when I'm trying to do highway speed (100km/h). Needle is buried when I'm only doing 109km/h. How could I recalibrate this. Also have my winter tires on and the are 235/75r15. Also will have to...- fast_n_low86
- Thread
- 3.42ratio different tire size gm 8.5" speedometer th350c
- Replies: 10
- Forum: Automatic Transmission
