Tranfer case pops out of gear and grinds.HELP

[4544x4]

sometimes when I put my 97 in reverse the gears will engage but most of the time it grinds.also when I decel in drive it will pop out of gear and grid.I've replaced the motor on he tcase.made no differenence.Same with 4wd vs 2wd.
it a 97 explorer control trac.tcase is a 4405.no mods.just had trans rebuilt.it is a 5r55e.please help with sugestions of where to look or how to fix.

 

[gijoecam]

Search for 'transfer case buzz' or 'transfer case grind'... basically, there are a few things that can fail in the transfer case that can cause the shift fork to fail to hold the low range planetary gear set in-place. When that happens, the helicle cut of the gears forces the gears out of mesh when the gears are reverse-loaded (i.e. when coasting against the engine or when reversing).

If (when??) it happens to mine, I'm going with rebuilt case sections and a modified shift rail and fork from www.omegamachine.com. Quite a few people here have used their parts and have been quite happy with the results.

Good luck!

 

[4544x4]

thanks