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Drivetrain (Excluding Engine) Transmission, axles, clutches or other drive-line related discussion.

3.91-3.63

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Old 08-09-2016, 06:23 AM
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3.91-3.63
If I swapped my HHR transmission for my Saturn transmission the gear ratio difference would wig out the sensors.
Anything I can do about that to make it work?
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Old 08-09-2016, 07:20 AM
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Hptuners allows you to calibrate the gear ratio and tire size so you could get your speedo accurate again.
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Old 08-09-2016, 08:30 AM
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Not the sensors, the computer. I imagine the sensors are identical, program is different.

You might be able to swap the TCMs.
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Old 08-09-2016, 06:42 PM
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Think GM dealership could shed some light. The higher gears could give better mpg on the highway. 95% of our driving is highway anyway.
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Old 08-09-2016, 06:44 PM
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Also, the shifter linkage on the transmission is different. Wonder if my tower can be swapped in?
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