Originally Posted by bobmwmz
I'll try again in the morning. I'm at work tonight. You want a better pic of the 2 you posted in your last post correct? If there is other angles you would like to see, I'll try.
I'm trying to see if the needle bearing race "a" is rubbing on the inner surface of the housing "b". I don't think it is a cause of your loose sending ring but it looks to me like there might be no space between the end of the bearing race and the housing aluminum. There should be some space there. If the bearing race is rubbing, in addition to a lack of space the race will have very fine scoring from wearing on on the aluminum housing; that's why I wanted to see a sharply focused pic.
You can also tell if the needle bearing race has creep off its seat by looking into the gap between the pinion gear and the housing. The correct viewing angle (which is narrow) and good lighting will allow you to see if there is a gap between the race and its seat on the pinion shaft. The arrow in this pic shows the gap I am referring to:
If the needle bearing is creeping, I'd disassemble the input pinion and press the race fully back on.
If you can get the sending ring back onto its seat without removing the tapered roller bearing, that's what I'd do. If not, you'll probably end up replacing the tapered roller bearing. I've not been able to remove the tapered roller bearing without stress or damage to it. If you replace the tapered roller bearing, the gear lash should be checked.
BTW I can't conclude from you pics that there isn't some scoring on the rollers of the tapered roller bearing. If there is even surface scoring, I'd replace the bearing.
And while you're in there, I'd replace the crownwheel bearing and measure it for proper preload shim thickness. Too many of these FDs have crownwheel bearing problems, you have almost 50Kmiles and replacing the bearing is relatively cheap insurance. BTW, the experience of cutting open many crownwheel bearings that felt fine but were found to have varying stages of wear/damage tells me you simply cannot tell if the crownwheel bearing is okay by the feel of it.
BTW if you don't find a cause of the displaced sending ring, I'd suggest degreasing it and its seat really well and putting a little red Locktite on before pressing it back on.