big problem

[Kestrelsuper]

hi guys
hope you can shed some light on my problem,i have a 1/10 truggy nothing special with a vertex ,18 engine..its had probably a gallon through it no problem and starts second pull every time..i got it out today and it stripped the gears in the gearbox...thinking it was a dodgy gear cog i replaced the gears and tried again..this time it stripped the gears in the gearbox and the teeth off the clutch bell WTF!!..I've taken the gearbox off and it spins freely no problem..engine turns over as normal..can't work it out????
any help will be greatly appreciated
cheer
Andy

 

[Phins Fan]

What kinda truggy?

 

[Kestrelsuper]

hi mate
its a hsp behemoth,not a £1000 dollar model i know but its been a good truck so far with no problems..its still on the original glow plug !!!tuned and running great...when i started it it wouldn;t move then it jumped a few times..then as i throttled it it just stripped the gears..could it be clutch??gearbox is spinning free as are both front and back diffs????