Crack Inspection in Aluminum

[Wayne <wmc_st@xxiii.com>]

Hey Guys,

Looking for input on the best way to inspect for cracks in a cast 
aluminum part.

The transaxle in my car developed one (known problem with this model) 
and I'm trying to determine its extent, and if it's 
repairable.  There's a visible hairline at one edge, but I think it's 
more extensive than what I can see.

I'm familiar with MagnaFlux, but doesn't that only work on ferrous 
metals?  Are there any dyes or other tricks you can suggest?

Thanks,
    Wayne