To all e firestorm/blitz owners, I really recommend you make the diff mod I did. Before, it sounded like a small stone was stuck in the works. I did multiple rebuilds, but it still made a grinding noise, and was not working properly (it felt almost like a spool). So I took out the spring and the shims, filled it with shock oil NOT diff oil, and now have a beautifully smooth and noise free diff. This is a design fault, and is certainly not the usual hpi quality. I would like to know if any of you have had this fault.
Just thought i'd share it with you
