how can i fix my input gear from sliding

[typhon#5]

so im having a problem in witch my input gear leading to the rear diff is sliding and it causes the front wheels to spin anybody know what i might be doing wrong

 

[Exc3l]

Is ur rear diff stripped? Pics?

 

[K-BASH]

On 6s??? Lots of loctite.these exb ones are way better..grub screw bites good on the D.? sounds funny

 

[typhon#5]

nvm the rear gearbox cover isn't set properely and the diff can move