Burnt trans fluid, won't engage ANY gear?

[Expl0d3r]

Hey guys, I've got a 99 explorer, 4.0 sohc with awd/4wd with dark stinky fluid that intermittently (most of the time) won't move in any gear. I understand that with potentially burnt/darkened fluid (& likely never being serviced) that may be the problem but something tells me it's something more. I believe it to have the 5r55e trans, but don't know for certain...

I don't have a way to measure transmission pressure yet, but when I get paid this Friday I plan on purchasing a gauge to check this. I have an obd2 scanner that won't pick up trans codes, wish I did because always the OD light is flashing. what would you recommend troubleshooting first? I have studied up on the 5r55e trans for a while now, and today I want to start working on it. I am wondering if the problem would be the EPC solenoid, or pump? A pressure loss would not allow it to shift...Any and all advice is appreciated, thanks!

 

[PopRichie77]

Burnt fluid usually means that the clutches or bands were slipping and it may need rebuilt. Get the code read and a pressure check and go from there.

 

[Expl0d3r]

here's the tag on the truck i'm working on. any way to identify exactly which transmission is in it guys?

 

[Expl0d3r]

nevermind, just found the chart showing that it is in fact a 5r55e. got the truck to operating temperature today and cycled through all the gears, not one of them grabs. no access to a scanner that'll show codes..and still having trouble getting ahold of a pressure gauge. *sigh* if the transmission won't move in any gear, would that indicate a pump, or pressure regulator/EPC solenoid failing? i've read countless guides and i have the ATSG manual but no solid answers..