Which trans do you have - the E4OD or the AOD? With 15.5
qts fluid, I suspect E4OD. If so, you may be looking at a
bad solenoid pack. It can be checked externally for
electrical problems. You will ned the ATSG manual for it to
get all the correct values. You may also have a related
fault code stored in the ECM if you scan it. Keep in mind
that many transmission problem like this are related to
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