Question on pinion backlash

[Skarkull]

I’m rebuilding a 8.8 and I’m currently checking tooth pattern. I’ve checked back lash and I have it set to .011” with maximum allowed at .012”. Tooth pattern is centered between crown and root but is too much on the toe on the drive side and heel on the coast side. Everything I’ve read says I need more backlash. How is that so?

 

[RocketcarX]

I keep this pamphlet in my toolbox, it is the best reference material.

https://www.yukongear.com/downloads/manuals/yukon_general_installation_instructions.pdf



This is great explanation from a mind that understands

 

[RED09GT]

Did you take a baseline reading of your pinion depth? From the pattern, it looks like it needs to come out a bit.

 

[Skarkull]

It was disassembled and prepped for powder coat before that was done. Being it had issues to begin with we didn’t think it important to take measurements from a bad setup

 

[RED09GT]

The pinion needs to be shimmed out some more.

One trick is to take an old pinion bearing and open it up with a grinder or a piece of emery cloth so that it will slip on the pinion. That way you can mock up and measure without having to press the new bearing on and off the pinion.

 

[hunter1022]

As someone else mentioned above if you are reusing your ring and pinion gear you should take a base line before disassembly and reset the backlash to what ever it was the ring and pinion already have a set wear pattern and if you are not set at the same you could end up with a real noisy rear and possibly early gear failure.

 

[Skarkull]

I have the original shim, measured and have it set up to the original spec. Also, I did use a set up bearing, tearing down isn’t that much of a hassle, just time consuming.