slash 4x4 running slowwww

I have a 2 month old slash 4x4. It's been running like a champ, but last night it just began to run like if it was on a dying nimh battery. Very slow. The truck is currently on lipo mode, with a 2s 5000k mah lipo fully charged. I already reset it back on race mode but still maintains its slow and sluggish performance. I switched from lipo to nimh to see if it was my lipo pack but it was not. I can't figure out what is wrong, since I am a noob at RCs. Any suggestions or advice is greatly appreciated!

Thanks,

-Jaime

check for binding in the drive lines, check that there are no locked up bearings
possibly overheated motor if temps ever reached 180 +

+1 on Batmans suggestion its the most likely the source of the problem.
Hope this helps! :D

since your a noob I'm guessing you dont have lots of stuff laying around so I would say talk it to your local hobby shop they can trouble shoot for you by testing the battery, ESC, and motor. My guess is its the motor though.

your pinion couldve moved closer to the spur or farther