Thanks for the reply I've put 1000 in the rear, 10000 in the centre and 5000 in the front. Also when there was grease in the diff it was real easy to turn but when i put the oil in the centre diff it was far harder to turn. Why is this. Also i heard that you only fill it 2/3 thirds of the way up is this true. My dads taking a pyhsco because he thinks it is rubbish. Will it change when i get to the track.

Could you tell me how to check if someone replys to you without going through all the forums i've posted.