Rear End Backlash Rated G for general audences...I promise

[Ed Saniewski]

I am in the process of assembling 2 rears, one a standard 3:78 rear that will go in my 160B with a 4 speed O.D. transmission. The other is a 3:54 that I will put in my 29' CCPU. The question I have is I was able to get the backlash to come out great in the 3:78 rear, but there seems to be a lot more "slop" or play in pinion to ring gear of the 3:54 rear. A friend that was helping thinks that it is because of the space between the gears. He feels the 600 wt. oil will make up the difference. When we put the marking grease on the gears it looks O.K. but you can feel a little more play in the gears then the 3:78.
Has anyone else found more play in the high speed rear then a standard rear? Dose this make any sense??? Thanks, Ed Saniewski