Good morning,
This issue is mechanical, not electrical.
https://www.2carpros.com/articles/automatic-transmission-problems
The first thing I would do is drop the pan and change the fluid and filter. A clogged filter will cause this.
https://www.2carpros.com/articles/how-to-service-an-automatic-transmission
Beyond that, it is either the torque converter that has failed or the front pump in the transmission itself. that would require removal of the transmission and either rebuilding it or replacing it.
https://www.2carpros.com/articles/transmission-replacement-removal-manual
Roy
1. With torque converter removed from trans-axle, position Holding Wire tool No. T77L-7902-A or T77L-7902-R or equivalent in thrust washer slot.
2. Install one-way clutch torquing tool No. T81P-7902-B or equivalent in reactor spline while holding wire in position.
3. Turn torquing tool counterclockwise using a suitable torque wrench. If torque tool begins to turn before torque wrench reads 10 ft lbs, replace converter assembly.
Images (Click to make bigger)
SPONSORED LINKS
Tuesday, April 13th, 2021 AT 6:47 PM