I posted this in off road nitro but probably should have put it here in monster trucks so I am sorry for the double post.

I acquired a T-MAXX and need some help. This is all I have to offer from the pics I've put up. I need to identify the engine and the model. It starts up but the engine sounds really really bad. Sounds like a bunch of things rattling around in there like rocks or almost like plastic parts that have snapped. I am assuming it probably has to be replaced and if so I may try the TRADE UP if they take this one or possibly drop another one in. I have been in RC for years but never in Nitro. This is all new to me and am looking foward to a project for this year. Any help would be appreciated.

Thanks