is that the "no limit" one? i had a duratrax ESC and it was doing that from the word go....... but worked fine each time i took it back to the store....... funny that.....

after two years you would be best to get a new ESC probably not a duratrax go for a name brand like Novak, LRP etc.

if your truck has twin motors and batteries you cant go past a Novak Super Duty ESC, i have one in my E-Zilla and it works great

if not then a LRP IPC Sport series esc would be a good choice.
http://www2.towerhobbies.com/cgi-bin...?&I=LXRE96&P=7
I have one of these in my F-201 and have had one in my TA-04 and DF-02 buggy. they have never let me down and they are much better quality than duratrax.