my original write up.
removing 85 transfer interlock pin for twin shift
you can get it out pretty easy, ask questions if you do not under stand what I am saying.
if you are going to 4.7 gears, you will all ready have it this far apart. so this will not do you much good, but if you are using the stock gearing this will save you 3 or so hours.
to start, you have just the case out, that is one case not bolted up as duals.
take the shifter out.
take a good parts magnet the ones that are on the extension rod.
now pull that (drivers side) shift rail forward with a screw driver. you may have to shift the other rail to do this.
Mark it at the edge of the case if you are cutting the rail for dual cases. use tape.
now stuff, just a bit, not to much of a paper towel or rag down and around to help the magnet catch the roll pin. remember you have to get the rag back out, so don't get carried away.
I think that it is a 3/16 punch that I used.
Also this is the shift rail that you have to some times cut flush with the case, in the forward position for dual cases. (drivers side.) a dremel tool with the cut off wheel is what i used.
remove the 6mm shift rail spring bolt. remove the spring, make sure you get the little ball also.
now knock out the roll pin and pray to the Toyota gods that the magnet catches it. mine did.
now make sure you mark the shaft or look close at how it went in.. don't rotate it.
pull it part way out. don't pull it out of the shift fork.
cut it off where you marked it.
I used paper towels to hold the shift fork and rail forward and my magnet that caught the roll pin. I then tipped the transfer case on it's side to dump out the inter lock pin. it is pill shaped and about 3/4 inch long.
now slide the shift rail back in.. make sure that you have the roll pin hole lined up.
beat the roll pin back in. I used a needle nosed vice grip so I would not loose it into the case.
took several tries to get it in to the hole that I could not see... don't mess up the roll pin by beating on it.
now put the shift ball and spring back in.
I learned this because I could not get the rear out put flange off, no matter how I tried. I even tried 4 foot breaker pipes, bars what ever.
so sat down and looked at the pictures in the manual for a long time before I saw what I could do.
catching the roll pin is important. cutting the rail is important, getting the shift rail and shift fork holes lined up to put the roll pin back in is important.
when installing the shifter.. have the two shift fork (holes) lined up to make a square.
install two bolts, one each side of the shifter and make sure that they move OK.
It is possible, I did it, to get the shifter fingers in front of the shift slots that they need to be in.
I tried the trail gear aw some shift springs and I could pick up the transfer case by the shifter and it was not shifting, to give you an idea of how hard or strong those springs are.
my wife could not move the shifters at all with out using both hands!
it should be mentioned that the heavy duty springs increase the shift resistance by about a factor of 10 times as much pull to shift!!!
I would, if you are worried about it jumping out of gear. stretch the stock springs, no more then 1/8 inch and install them.
I would only use the heavy springs if you have a problem with the case jumping out of gear, like in rock buggy racing where the weight of the shifter, and hitting something hard, will knock it out of gear.
also the shift boot and mount require tolerances that are very close. I marked and cut the hole about 1/4 inch off. It moved when I mounted up the transfer case cross member. I re cut the side that was hitting, the included mount ring is to narrow, and now have to make a new (boot ring) to cover that part of the hole.
I would like to see the present trail gear, mount ring included and a second mount ring about 1 to 2 inches wide included in the kit.
the present ring would go under the boot and be pop riveted to the wider, (go's on top) ring that I am suggesting.
For those of us that cut the hole to big!!
I hope that this helps others that are trying to go to the twin shift.
their write up with pictures.
http://www.trail-gear.com/pdf/107500-1-k.pdf