2000 RANGER AUTO TRANNY DING DONG

[FJB]

INSTALLED REBUILT VALVE BODY AND IS RUNNING FINE!

All Automatics run on Fluid Pressure
Pressure is supplied by the pump inside transmission hooked directly to torque converter, so spins at engine RPMs

The Valve body routes this fluid pressure to the Clutches and Bands(brakes)
The pressure holds clutches engaged or disengaged, and brakes(bands) on or off, this is how the different ratios(gears) are selected

There are pressure ports on the outside of transmissions to test pressures in various "gears"

Obviously internal fluid leaks will lower pressure, sometimes overall and sometimes just for one valve, and valve seals can leak
These leaks usually occur in the Valve Body

The 4R44E or 55E were first used in 1995 Rangers, the 5R44E or 55E are THE SAME transmission internally, so any info on either applies to all

Good article to read here: https://atracom.blob.core.windows.net/gears/2003/2003-05/2003_5_50.pdf

Explains what is happening inside as ratios change, what valves are used and not used
Also explains why answering "why is trans slipping" is not easy or specific, there are multiple reasons/causes and they overlap
Wholesale changing of Valve Body "may" fix it
But not a waste of money because if it doesn't fix it then you need a rebuild and already have the new valve body for that

INSTALLED REBUILT VALVE BODY FOR $135, RUNNING GREAT! THANKS!

 

[CrabGuy]

Maybe you should install a rebuilt valve body

 

[FJB]

Maybe you should install a rebuilt valve body

i DID, I PURCHASED A REBUILT ONE FOR $135 ON EBAY AND IT IS RUNNING GREAT! THANKS!

 

[FJB]

It could be...

There were some valve body gasket issues... but I think those would cause issues all the time and not temp related.

Let's see if someone else chimes in with something more helpful.

I RELACED THE VALVE BODY AND IS RUNNING GREAT! $135 FOR REBUILT ONE ON EBAY!

 

[FJB]

Miles on Vehicle? Miles on Transmission?
ATF Level+Color+Smell? How long since ATF+Filter Change & Band Adjust?
TechServiceBulletin 2010\Earlier for ValveBody Kit+BondedGasket repair in this era 4r\5r Trans; has this been done?

INSTALLED REBUILT VALVEBODY AND IS RUNNING GREAT! THANKS!