Butcher,
Thanks for the reply. This is my first RC car, but i am a toolmaker by trade and have lots of experience building full size drag race car diffs and this is why i feel there is too much clearance in this setup.
I have just measured the spacer ring that goes between the two bearings and it is 0.1mm thicker than the shoulder on the pinion gear, so there is 0.1mm i can get rid of. Next to measure is the depth of the bulkhead (what i am calling the diff case) that it mounts into. i will let you know how deep it is v's the overall thickness of the bearings and pinion. once i do that i will know the clearance in there and the amount of shim i will need to remove all the clearance.
I believe the 0.1mm i have found in the spacer ring is too much and i wiant to get the whole assembly down to at least 0.01~0.02mm clearance when it is bolted into the case.
The diff centre is shimmed so there is a very very small amount of backlash when the pinion is all the way in. however with the axial movement there is a heap more backlash when the pinion is pulled out (pulling on the drive lin end)
Once i have made the new shims up i will take some pics of it.
Hi Eric,
As i said above i think the diff centre is shimmed properly for gear mesh when the pinion is all the way in. the problem as i see it is the axial clearance in the spacer ring and diff case that allows the pinion to be further in and no backlash, or float back and have a lot of backlash.
As i said this is my first RC car and maybe this is what it is supposed to be like, but i come from an industry where we work in 0.001mm and it just feels to me like there is to much clearance.
I'll have photos and more details by the end of the week to share.
Cheers and thanks.
Darren
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