Transmission has lost forward moving gears

If the transmission goes in reverse, then more than likely the fluid is okay, but we always need to check and make sure the level and condition is okay.

Here is a guide that will help with this. Plus, the condition of the fluid will help figure out what may be happening.

https://www.2carpros.com/articles/how-to-check-and-add-transmission-fluid

Next, we should check the pressure in the unit and find out if they are correct.

I suspect the pressure is going to be low in drive which means we have internal issues and would need to drop the pan.

Please see the process below and let us know what the pressure is, and we can go from there.

Thanks