Hey guys i have a summit which is mostly stock. Last week i had a problem i thought was a bad pack so i ordered two brand new traxxas 3000 packs. Charged them up and within a drive 20 feet to and from me they were already losing power. I drove it around full throttle to see what it would do. Only lasted another 3 mns maybe!!! I took the motor out. The motor and drivetrain all spin freely... what could be the issue??? Never seen this in 20+ years of rc exp. Thanks everyone!!!