Ive been looking for this specific theme from the movie,but didnt find it in any OST or Score.I'd be overjoyed if anyone could provide me with a DL link.
You can hear a piece of the theme here,at around 2:40 :
http://www.youtube.com/watch?v=6CybNg1b58w

Thanks in advance

I don't have a download link, but I can tell you the cue name and which soundtrack it appears on. It is the track named "Scorponok" from the Transformers score by Steve Jablonskey. The theme you are looking for is most likely Scorponok's himself, but the part you're talking about is when it changes to the military's theme. Unfortunately, the electric-sounding part is doubled as Frenzy's theme when he's at Hoover Dam. I hate it when they use the wrong cue for the wrong scene lol.

well,its that military theme i'm looking for.
But u say i might find it at the first movie's Score?
Ill see what i can find.
Thanks.

No problem. As far as I can recall, the military theme is present mostly at the end of the Scorponok track on the first film's soundtrack. So I'd check there first. I hope you're able to find it, and I apologize for not being able to give a link!