how do you tell the difference?

I pulled the trans dip stick after my commute home (long enough of a drive) and I swear the damn thing was dry :lol I wiped it off and put it back in for a few seconds...pulled it out...dry. I wiped it off expecting to see red fluid on the blue shop cloth...nothing. Just black smudge marks.

What i've been experience lately is, especially in the cold mornings, I'll let the truck warm up as normal - then put it into OD or R depending how I was parked in the spot and it'll just roll as if it's in N. Then I'll give it some gas and it'll shift into gear.

This is any automatic trans with 4x4. 1990 Bronco II A4LD

No other issues while driving, stop and go traffic, etc etc. It shifts while driving as it should - except for shifting into Overdrive. Until I figure out the check engine light and code 54, it won't shift into OD.

I just don't want to drop $160 on a flush/fill if it won't help.:suicide

add fluid. lucas makes a great transmission additive.

Lucas blew up my S-ER Spec V :banghead Nismo headers w/out cat - full NISMO exhaust, sway bars front and back etc etc. Many 1/4 mile street races...then put that shit in with my oil and BOOM - on the way to work on morning. Pulled into the Nissan dealership with a 10 story plume of smoke behind my car and a top speed of 4mph. Got $3k for it lol and rolled out in an Altima.

I stopped using their stuff. If you read the bottle for the Lucas stop leak and other stuff...it's the same ingredients. :scratch

drained and filled the fluid and replaced the filter :punk

There wasn't enough T-fluid in the truck to fill up a 1 gallon jug of Repsol - even let the T-fluid drain overnight... lol....oops

The cork gasket that was on the trans pan was a PIA to scrape off and the filter screen for the T-fluid filter was all ripped and shit lol...old ass shit.

Replaced with a rubber gasket and Castrol DEX/MERC fluid.

Since the drain and fill - everything is working great!!

Need to pump my differentials now.