Backlash on a new crown and pinion

[73eldorado]

A question on backlash on a loop gearset, i have a perfect pattern on my crown gear with bluing . The pinion has .002 of axial movement but when I check for backlash there is none. The pinion and crown turn over perfectly in the case, with auto and heavy duty vehicles there is a few ways to set up backlash. I am using Stein Dinse gears and they use a method called Klingeinberg Palloid toothing which they claim has parallel high teeth along the entire tooth width. The pattern is perfect and turns over easily but I have never installed a gear set without backlash.  I see that there are some different size shims behind the cover but have heard they are unavailable, any advice would be appreciated.

[guzzisteve]

I use a puller on the ring gear to keep it against the cover then check the blueing like the later manuals state. I think you can still get all the shims. At least I could a few years ago. Pinion shims are the same on all, and if you only need a bit more I use extra gaskets.
When checking all bolts & nuts must be torqued.

[Wayne Orwig]

What Steve said. Try an extra gasket on the ring gear cover.
If there is no backlash, when the gears heat up you may be too tight.

[73eldorado]

Thanks guys, I was fairly certain that I needed to get some backlash.

[pete roper]

I go the same way as Steve and Wayne. With the earlier gears with smaller teeth set-up is more critical than later sets like the 8/33’s but backlash is a critical factor.

Pete