Need Help With Helical Diff Gears

[RCRacing88]

Hello,

today I picked up a helical pinion gear for my 1/8 buggy's front diff, and also had to pick up the diff gear to go with it.

When re-assembled the diff after changing out to hardened outdrives too, the diff gear and pinion will not sit correctly in the housing.

Hopefully these pictures will give a clearer understanding:











Hope fully you can see that the diff gear is not sitting on the pinion well, lifting it up at one side.

What is causing the problem? and how can I resolve it?

Thanks