Help with a lionel legacy

Are you running it in command mode or conventional?

In command possibly you have set the speed limit when it was at a very slow speed. If so you can un set the speed limit. 

There are several vintages of Legacy with slightly different characteristics.  What model, specifically, is it?

Not sure any promises can be made for a long-distance diagnosis but:

• You have the switch in "RUN" - so you are running it conventionally and it does this, yes?  
• You say it sounds fine and creeps, so the sound is apparently working and it does move.  When it moves, even slowly, do you get anything other than idle sounds from the tender? - i.e., chuffing, even if a very infrequent chuffing as you would expect at a creep?
• If you have a way to measure current, what reading do you get at idle and what at full throttle?

I've done this.....on the hand held cab-2, do you have the brake lever on.....towards the + symbol or slid down?

TEX

Steve