1969 Dodge Dart issue with installing axles after thrust block removal.

From a previous post yrs ago.

Put the wheel on the axle thats in all the way,, and drop it on the ground,, block it front and back..

The axle that won't go all the way in, depending on diff, may have a 2 piece side-gear that can mis-align the splines, you may be able to see a misalign,, put the axle in as far as it'll go,, get a lever long enuff to to fit thru the lugs,, and try to turn the axle/outer gear a tad at a time,, and tap the axle after each movement until it pops in..

Or,, as mentioned,, there's a button that coulda dropped out on SOME diffs, maybe have a look in there..