Help with RRP primary/reverse.

[MyJeep]

I bought RRP primary gear & reverse gear. They doesn't fit.

RRP Primary

RRP Reverse

Did i bought the wrong part? By the way it is for Maxx 2.5

 

[MyJeep]

? No one can help me ?

 

[Lessen]

try fitting them together both ways (turn one 180 degrees). Mine only fit one way and I had to force them a hair. The primary kinda grinded a bit of the alluminum away when I put them together, no big deal.