Originally Posted by Roken

If your screw heads are not flush with the chassis it could simply be that the parts are not seated correctly. I noticed this with the front trans assembly. I had the screws flush but as I kept assembling I noticed that the front screw heads pooked out more and more. The problem is the tounge on the front bumper, it actually raises the trans up as you slide it in. The plastic diff housing should be seated flush with the kick up of the chassis and the section that goes through the chassis should be flush with the bottom of the chassis. I had to grind the thickness and sides of the bumper tounge to finally get the front diff assembly to fit properly. I mean I had to remove a lot of material, I bet I took 5 degrees of kick up out of the thing.