Replaced transmission, cant shift into 3rd?

[Koray]

I replaced the transmission on an '05 kx85, and ive put the cases back together and everything spins freely, it shifts through all the gears, but once you put that tensioner thing that presses on the shift drum (dont know what the part's called) you cant shift into 3rd, itll get stuck halfway between second and 3rd, but once you take off that tensioner thing you can spin the drum and shift through all the gears just fine, whats going on?

[Koray]

Anyone else have this happen?

[Boshwa]

Are you turning the drive shaft while you shift? Things just might not be lined up correctly sitting still

[turbo dan]

18 minutes ago, Boshwa said:

Are you turning the drive shaft while you shift? Things just might not be lined up correctly sitting still

That could help.  Hold the output shaft stationary and turn the input shaft while trying to shift.  The dogs don't always drop into place until the gears have moved relative to each other.

[Koray]

4 hours ago, turbo dan said:

That could help.  Hold the output shaft stationary and turn the input shaft while trying to shift.  The dogs don't always drop into place until the gears have moved relative to each other.

I do spin the shaft while trying to shift, and it'll get stuck in between random gears, after playing around a bit it'll shift but then it'll happen all over again, everything is spinning correctly and there are no grinding noises or anything, could it have something to do with not having oil although I put tons of assembly lube before re assembling?