No up shift no reverse
SOURCE: automatic 3 speed transmission wont shift out of first gear
that is what they consider safe mode for those transmissions, they are a very smart electronic transmission it does that so you dont ruin the trans.
It has detected a problem and you must take it to a tech and have the codes pulled, could be as simple as a sensor or solenoid pack
SOURCE: automatic transmission won't upshift
has something stuck between the linkage visually inspect it as well as check the gear oil level hmmm check the vacuum line going to it ..ensure it is connected and not dry-rotted causing a leak
SOURCE: AUTOMATIC TRANSMISSION SHIFTS BUT DOES NOT TRANSFER POWER
Check the oil level of the gearbox while the car is idling. if the oil level is to low it will give you those symptoms. If the oil level is on its mark it might be that the clutches in the gearbox that is slipping
SOURCE: Transmission does not upshift. Shifts from park to
Sounds like one of the speed sensors are bad. It has an input speed sensor and an output shaft speed sensor. You need to have the TCM scanned for codes to see if one of them is bad.
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SOURCE: transmission shifting very hard
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