Help please

[itsbeen1]

So I'm driving my truck today when I take of from light and all of a sudden engine just revs and lucky I was on a hill coasted into a parking lot was about 5 blocks from my house so I just shut it off for like 15 minutes started up and went into gear barely made it home and boom went out again fluid is low and does not smell burnt what could have happened and should I be worried when hot doesn't catch when cold goes into gear works for a bit the acts like its in neutral

 

[Grimes]

Just to get away from the simple fix, you're sure you're not in the 1, 2, 3 high grade modes, correct? I know I have done that once, and it scared the crap out of me when I wasn't expecting it.

 

[itsbeen1]

No it just revved like I was in neutral till it cooled down then put in gear and it would work but only for a little bit then start slipping again and none of the gears would work when it was completely stopped until it cooled down from being off and couldn't get past 20 mph

 

[jomulk56]

You said the fluid is low? I'd fill it up and see how it works then.