I have a 99 f350 V10 gas dually dumper. Today while driving I stopped at a stop sign. When I went to continue the transmission seemed to be in neutral, then it caught and I drove through the intersection. It 2-3 seconds later disengaged again. I pulled over. When I attempted to put it in park it grinded.(bad enough I just turned off the key). I checked the fluid. It was close to full and red. While in park I restarted. Truck started fine. I shifted into drive and nothing. It was like it was in neutral still. I attempted to put in park again and more grinding. Also while in park it does not hold the truck from rolling. After getting towed home I checked the tranny fluid again and it was still looking ok. I drained the transfer case also. The fluid in there was near black an appeared to have a metallic look. Does this problem seem to be just my tc or tranny issues also? Any help would be great.

 

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You don't need to read codes this time. Your transfer case is dead. Rebuild or replace it.

 

I agree. If it's grinding going into park, then the problem is behind the transmission, not inside it.

 

was the transmission fluid level OK before you emptied it?

when you pour the fluid into another container, does it still look really black or reddish? (the redder the better) it's possible it was way overdue for a change...

It's normal for there to be a little metal in the fluid and on the magnet in the pan [which you should clean off before reinstalling].

 

The tranny fluid was fine. It was nice and red and changed 3 months ago. It's the transfer case that had the blackish fluid and metallic look. Metallic like paint. Quite sparkly.

 

I am removing this morning.

 

I notice that when I try to loses the bolts to separate the driveshafts I can make the truck roll. Is there something between the tranny and tc that could go?

 

Between the transmission and the torque converter is the input shaft. Between the transmission and the transfer case is the output shaft.

If the input shaft broke it would not cause your problems. If the output shaft broke you wouldn't have the black fluid in the transfer case and it wouldn't grind when you put it in park.