Here is the process from a file over on the 3FE yahoo group. I did it a while ago and the procedure below if fairly straight forward, but there is one think to look out for. Make sure you use a wrench on both sides of the bolt that holds the shift lever in place when you loosen it. You may be tempted to put a wrench on one side and use the shift lever itself for tension on the other... this is bad. You can end up reaming out the slot in the shift lever that is used to engage the linkage. What you end up with is a shifter that no longer is loose side to side, but has a bit play from front to back. Ask me how I know.
Oh yeah, anyone got a spare shift lever laying around?
From: "csafj62"
Date: Thu Dec 23, 2004 10:17 am
Subject: Re: Loose Shifter on fj62 automatic trans (part Nos. for ya)
You will want two (2) of part number 90385-16008. They are plastic bushings and are about a buck a piece.
Here's what worked for me on the install. Put the shifter in first gear. Remove the four screws securing the outer shifter cover and take it off. Remove the the four small nuts that secure plastic mechanism that shows you what gear the truck is in. At this point, you might need to CAREFULLY clip a wire tie securing some wiring cable in order to lift the mechanism up. You don't need to remove the mechanism entirely; just tilt it back so that you can access the 14mm and 16mm nuts securing the shift lever. Hold the shift lever to keep it from moving and remove the 14mm nut on the left hand side. Remove the 16mm nut from the right hand side. Make a mental note of how everything fits together before proceeding (particularly the flat spot on the "bolt" from which you removed the 14mm and 16mm nuts. Pull the shift lever off the "bolt" but otherwise leave the shift lever where it is. Remove the 19mm nut from the left hand side. Remove the bushing from the left hand side (if it is still there). Remove the bushing from the right hand side (if it is still there). Install the new bushings. The rest is pretty much the reverse of what you just did. Note: Before you rescure the mechanism or the cover, test the shifter to make sure it is not binding. If it is, loosen the 19mm nut a tad and try it again. You want the shifter to be secure but not stiff.
My description makes it sound involved, but it is really about a 10 minute job.