Typical 46RE shifting symptoms.. jumps between 1-2 when shifting from 1 to 2 holds the 1-2 shift and 2-3 shift (will hold the 2-3 shift very long, I usually let off the gas until it shifts) engine will sometimes 'flare' during shift, will rev up until shift is complete. shifts feel 'soft'
using a Snap-On Modis scanner, looking at
desired gov pressure actual gov pressure governor duty cycle pressure sensor voltage
** readings**pressure sensor voltage stays around 0.45v - doesn't change (this might be a failure of the scan tool to read)
desired & actual gov pressure stay pretty equal through 1st and 2nd gear, governor duty cycle is around 25-30
When it shifts into 3rd gear, the desired gov pressure reads 127psi, the actual runs from 40-70psi depending on road speed (goes up as road speed increases) and duty cycle goes to 1. To me, it sounds like the PCM is asking for more pressure, the governor solenoid goes to full open, but can't attain desired pressure. Desired pressure also seems high.. over 100psi?
My plans are to measure some pressures, check for good power and grounds, drop the pan, change the filter, pull the governor solenoid and look at the screens for trash. Adjust the bands and see what happens.
Anyone have any thoughts?
Jim