Thanks for the addition to the site. This post was from many years ago so they will most likely not benefit from it but others surely will.
However, I think they are experiencing an issue with an automatic transmission issue not going into gear.
I suspect this issue is either low fluid or a valve body issue. The first thing to do is check the fluid level and if it is low or burned then we need to change the fluid.
https://www.2carpros.com/articles/how-to-service-an-automatic-transmission
If this is okay then we need to pull the valve body down and do an air check. If the air check is okay then we need to suspect the valve body is not allowing the transmission to engage first but will allow direct pressure to reverse. This is indicative of a valve body issue so suspect this is what they would find.
Tanks again for updating this and hopefully this info will help others as they visit this page.
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Thursday, May 27th, 2021 AT 7:01 PM