Transmission pops out of first

I have a 2001 Tacoma TRD manual 3.4l 4x4 that’s first gear keeps popping out. Im looking to swap the transmission what year Tacomas would that transmission be compatible with?

 

Have you tried the easy fix of a new shifter bushing and seat??

Any of the W-59 95.5 through 2004 4x4`s 2.7`s

 

I haven’t tried that yet would that cause a constant pop out of 1st gear but no others?

 

Never hurts to try.

Would you have a bearing kit installed in what used Transmission you might get??

 

Wasn’t planning on doing that but it’s probably a good idea

 

Mine used to occasionally pop out of 1st while parked. Truck almost rolled into the street while I was in a convenience store once. Hasn't done it since upgrading the shifter seat.

 

Okay I’ll give that a look so far it hasn’t done it while I’m park only if I try to move in first it pops right out but all other gears are fine

 

Just checked the bushing and seat both are in good condition