hey everyone first time here i need some input if anyone can help i have a 2003 ford ranger edge 3.0 v6 2 wheel drive automatic and had for a couple years its been driving fine but just last friday i got in to leave my house cranked it and put it in reverse wouldnt move put it in drive wouldnt move put it in low 2 it go get on highway change to drive and it just rev da engine but cut the overdrive button off then go from low 2 to drive it operate like normal til u stop and cut it off what could be da problem transmisson fluid is full

 

Welcome to the forum

Automatic transmissions run on Pressure
The electronic controls(solenoids) only help smoother shifting after they are in gear they can't prevent a transmission from working, at least the Ranger automatics, which are retro fit electronic models, Ford added elec. shift control to the A4LD transmission a trans that worked without it

Reverse requires the highest pressure(150+psi) so slow or no Reverse is often the first sign of low pressure in the transmission.
This is caused by internal leaks inside trans, gaskets and seals that are failing and leaking pressure, this happens to ALL automatics over time, same as clutches wear out on manual transmissions, time and HEAT, heat is the biggest killer of automatics, 2 trans coolers is a must on car or truck.

Main pump(front pump) is what provides the pressure, it is driven directly by the engine via exterior case of the torque converter, so pumps RPMs and pressure output is based on engine RPM, which is why REVing the engine can often get a transmission to engage, forward or reverse

The Valve Body on the transmission is where "most" of the gaskets and seals are located and it can be changed without removing transmission but.................."most" is the key word, you can invest time and money in valve body repair and still have the same problem.

There are pressure test ports on the transmission, trans service shops can use these to "maybe" pin point the problem, but it is often not definitive, more of a best guess

The miles on the transmission would be what would decide "what to do"
Automatics have bands(brakes) and clutches that do wear out, just like brake pads on a car, these last longer but still wear out.
if you are close or over 200k then full rebuild would be best course, IMO