IMS Bearing failure mode?

[thom4782]

I'm not clear in what you're saying so part of my comment may be off base

If you've taken the IMSB flange off and the bearing has a lot of play, then it's degraded and nearing failure. New bearings have little or no play whatsoever.

There is a better solution out there than the ball bearing design. It's called the IMS Solution. It is for single row bearing cars only. It sounds from another thread that you might have a dual row bearing car. Dual row cars do not have a snap ring whereas single row cars do.

PS: IIRC, 99s were dual row bearings.