Is this normal?  Rebuilt by George Hammer in 05, didn't say anything and I didn't notice until this winter. Don't think I did this as driveshaft was gone though along with a new clutch, etc.   Along  with the rebuild he put in a new rear bushing in the tailhousing.  I took it out this winter to try and repair a leak at the front hole for the countershaft.  Picked it up today to move and start the repair and notice the hairline cracks around the housing for the revers shift fork and where the transmission mount is bolted to the tailhousing.   Need to be fixed?  Appreciate all opinions and suggestions.

Thanks, Jim

Photo's are hard to tell, but those lines almost look like parting lines from the casting process... but like I said, the photo...

Give this a try:
(photos 1 & 2) Use some fine sandpaper and dress down that line a bit, then remove the mount from the pad, and re-thread a longer bolt (like a 3") into the hole, and very gently put some pressure against it perpendicular to the "crack". See if it opens up a bit.

It does look like a small crack coming from the dowel pin on photo 3, but again it could be a parting line or "flash" from the casting mold.

Look to be cast flash. Typically a crack would stop at a hole. Try what John suggested about seeing if the crack can open.

Looks normal to me.  It has to do with the polish on the die casting tool.  Trans housing's are a 'rough' casting, and unless they are machined they will have this type of finish where you can see some of the lines from the tool in the part.

You can see similar lines elsewhere in the casting pics.  I wouldn't say that these are cracks, just lines from the tool.

If you're still concerned, you could do as J.D. says and do some fine sanding to see if the line goes deeper into the material.

Or, if this is an injection casting, it could be a 'knit' line where the material flow comes together in the tool.  This happens more in a plastic injection molding process though.

Thanks guys, when I rolled it over to pick it up there was a little oil around the area of the reverse shift lever fork housing that got my attention, then I saw what I thought might be cracks when I cleaned it off. Maybe that oil came from the seal or ta leak along the dowel pin. Going to the garage to try the sandpaper thing.

Ditto what others have said. That's your typical crappy Muncie casting. I've seen some much worse then that. But agian, it's just the casting and nothing to be concerned about.

Thanks everyone, I'll be able to sleep extra well tonight. See you all @ Karl's