Originally Posted by THEBIGBULL

I just rebuilt the front and rear diffs on a TC4 I just got used. They were very clean and in very good condition when I took them apart. I washed all the parts, reapplied black grease to the thrust washers and balls, reapplied silicone grease on the ring gear and diff balls. Reassembled the diff according to the manual. Backed the bolt out 1/2 turn (composite diffs) as stated in the instructions. The diff action is extremely stiff and they don't diff freely. Is this normal....I am used 1/12 scale where diff action has almost no resistance.