Peter 5498

Hello, I have a DCF899 1/2 inch impact. It's a little over a year old. It worked great until recently when it started cutting out under load. If you free wheel it will spin on all settings. I made an attempt to clean all the battery contacts. I disassembled the gun to check the 2 smaller wires to see if they were loose. All looks good. I have a brand new battery and charger. It still cuts out. Looking for any suggestions... Thx in advance, Peter H