Sleeve Gear Bearing Installation

I'm in the process of rebuilding my Atlas gearbox. When disassembling the GB I was able to easily pull the sleeve gear out of the output bearing. After pulling the bearing out of the GB case (required heat + puller) I find the bearing slips on and off the sleeve gear with no effort at all. My new replacement sleeve bearing (AN / Old Britts) goes tight on the shaft just about where the sprocket splines end. Is this bearing supposed to be a sliding or interference fit on the sleeve gear? I seem to recall seeing the output sleeve gear being installed into the bearing in the GB with little effort. The recent post regarding the quality of AN tranny parts has me a little spooked.

No it is an inference fit between sleeve gear an bearing inner race. If there are no bumps rust or other damage then it should gently but firmly be tapped into place once bearing is fitted in GB.
In his DVD Mick Hemmings puts it on the mainshaft then taps mainshaft with soft hammer. I just used wooden shaft of hammer to tap it so as not to harm the sleeve gear.
Once the out LH nut is tightened against the sprocket and seal spacer the sleeve gear can't move.

If you warm the bearing up in boiling oil, it will probably be an easier fit.

Boiling oil still has its uses. !
And it doesn't have to be quite boiling, either.
Especially if you want the outer seal to function.

Perhaps I should explain that warming the bearing is to get the sleeve gear through it.

To get the bearing into the gearbox housing, the housing needs to be warmed, and the bearing cooled....

The bearing installed fine with few taps with a big socket and a plastic mallet.
It turns out there was a tight spot where the splines end, probably a result of the machining process.
The new bearing fits just like the old one so I'm happy.

Mark, don't forget to remove the inner side seal from the bearing to enable the G/box oil to splash feed it.

The seal has already been removed, by Fred at Old Britt's presumably.