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clinebarger · 07-06-2013, 09:04 PM

Swap positions with the speed sensors, If the ISS sensor is bad, It will now effect the OSS signal to the ECM instead of the ISS signal.

Swap sensors.....Drive till it acts up....If the sensor is in fact Bad, It will not want to up-shift at all.....Stuck in 1st gear.

07-06-2013, 09:04 PM	#70
clinebarger Senior Member Join Date: May 2009 Location: Fort Worth, TX Posts: 6,370	Re: 4l80e shifting ? Swap positions with the speed sensors, If the ISS sensor is bad, It will now effect the OSS signal to the ECM instead of the ISS signal. Swap sensors.....Drive till it acts up....If the sensor is in fact Bad, It will not want to up-shift at all.....Stuck in 1st gear.