Originally Posted by rogueldr

I need help and I hope someone here can help me out. I recently installed a Penguin 3500 LM chassis in my MRS4 and replaced the belt along with it. I'm running a ball diff in the rear w/ a stock diff in the front (until I can get my hands on a one-way), team orion micro modified motor, w/ a Novak spy esc and a Team Orion 1600 6 cell pack. My problem comes while running. The car runs fine for a few seconds then seems to bind up and freeze. When I pick it up and put it on the bench while its bound up the rear wheels will spin nice and free but the fronts seem to be locked up. I though it was the front diff so I pulled it apart and inspected it. The plastic gears seemed all right except for one tooth that seemed nicked. After reassembly the car rolled smooth as glass. Then once I put the motor back in and put power to it the same thing happened. I just placed an order for new gears and I hoping that will do it. Anyone have any other ideas? Plus does anyone know where I can get a front one way for this little guy. I need to get this thing running because all of the M18 and RC18 guys at my local track talk a lot of smack and I need to show them what my little HPI can do. Also is there a way to put some tension on the belt? I have the chassis set to 150 w/ a 150 belt but it is real loose and I think part of the problem is the belt slipping off of the front spool.