How does the speedometer gear stay in? MY bud took this apart and I cannot find a clip

Just my 2 cents... it is my understanding that the retainer ring in ToolManMikes image is there to retain the oil seal.




When you say the gear keeps falling out do you mean that the gear gets out of place in the transmission under use or that the gear will not stay in the housing before you insert it into the trans?
The seal drives into the housing. I tapped mine in with a deep 1/4" drive socket. Let me look in the manual to see if it tells. I remember doing a gear and seal change but I don't remember how the ring worked. It does look like it snaps in the housing.