Thread: 2000 Grand prix Tranny problem

From TEP's website for no gears, But since you have reverse IDK
-Broken input shaft
-Broken drive chain or sprockets
-Extremely low fluid level
-Broken ouput shaft
-Clogged filter from excessive debris in fluid
-Broken oil pump shaft
-Stripped torque converter splines
-Broken Input clutch drum shaft
-Broken axle or CV joint
-Badly damaged geartrain or differential

Outside of checking the fluid level and axles there is not much you can do short of removing the transmission for a teardown to inspect the parts.

could have also blown a gasket which then raised pressure going through the trans cooler line and sent it to it's death.