I have just rebuilt my diffs and put my normal oil in each 5K front 7K middle and 1K rear I have also put a new Pro UK Chassis and new HO BAO HYPER 7 FRONT/REAR CENTRE CVA SWINGSHAFT.

This is the 2nd time I have rebuilt my diffs, but this time when I push the car along the ground it does not free wheel like it did before, there seems to be a lot of resistsnce and one good push only sends it about 2 feet before the resistance brings the car to a halt. have I missed something? Will this resistance go after a few runs? I don't remember having this problem the last time I rebuilt. I have check breaks and clutch both are OK.

Diffs only filled 3/4 full with oil.

Regards
Mike