Stub shaft

[1nc 2000]

When I responded to you a second ago I wanted you to understand I do have the same shaft as the '18 and up

Good deal.
I would put this in my other sleds if it worked on the 1049 models.

 

[Clintww]

Can anyone explain the difference from 1049 models? I'm guessing spline length inside the shaft?

 

[KnappAttack]

Can anyone explain the difference from 1049 models? I'm guessing spline length inside the shaft?

1049 has the reluctor wheel on the outside of the stub shaft for ignition pickups, 998 doesn't.

 

[Ryan07]

Correct. Crank end of stub goes into the ID of that ball bearing. That ball bearing only supports stub, not crank. Crank has a main bearing right next to that ball bearing.
Another clever design feature of this is that no matter what you do with stub assy, you cannot preload the crank. The worst that can happen (if you only partially install the stub shaft into outer bearing) is to preload outer bearing but only to a minor degree. The depth of the female spline in stub is deeper than length of male spline on crank so it cannot touch crank. If someone doesn't have stub pressed into outer bearing far enough, that boss on stub will contact the ball bearing inner race and ball bearing will contact case and stop the whole assy from coming in any farther. You'd know it fast if yours was this way because the outer flange would be a gap to the case.
Here's another bigger view.

Regarding the seal and reinstalling it..... If I'm interpreting this correctly the ID of the seal will not be riding on anything as where it sits in the engine doesn't line up with the surface on the shaft? It only seals on the OD. The surface on the shaft must only be for alignment purposes on assembly? I am perhaps overthinking this but that doesn't make sense to me. Can someone that's put these back together comment?

I have mine apart, bearing had moved, I just pressed it back into the housing using bearing mount, and am going to attempt to reinstall on the engine tonight.

 

[KnappAttack]

Push the assembly in, its pretty simple. You cant mess it up. The housing will push the seal into the engine.

The seal sits on the small portion of the shaft, not the larger portion, its only there because it got forced there when it got pulled out, slide it back so its next too the housing. Don't overthink it.

 

[Ryan07]

Push the assembly in, its pretty simple. You cant mess it up. The housing will push the seal into the engine.

The seal sits on the small portion of the shaft, not the larger portion, its only there because it got forced there when it got pulled out, slide it back so its next too the housing. Don't overthink it.

it is pretty simple, went better than I thought. Thanks