Does anyone know whats involved with addind a button to switch between AWD and RWD. Is it easy, is it dependable or pretty harsh on the tranny.

It's harsh

go for it

Its not hard on the tranny, but you can KISS you transfer case GOOD BYE!!!!

Newfie.

So probably not a good idea.

worthless mod....I have it & thinking about removing it....

Its not reccommended, people have fried their transfercase with it

Thanks for the input. That is pretty much what i figured.

It is easy to do but it will wear the clutches in the transfercase.

I did it and the rear went south and the dealer would not fix it They said it was misused.

The "mod" in its current form, which is simply a switch installed in place of the ABS and EDIFF fuses, its useless.

A 2WD switch could EASILY and EFFECTIVELy be developed if someone put some effort into it. I've been pondering this mod for a while now and I think someone like paramount could do us all wonders with a "manual transfer case control module".

A wiring harness goes to the transfer case which somehow feeds voltage and resistance to the tranfer case itself, driving the tripple-plantetary reduction drive system, which in turn pushes on a lever, which in turn pushes the clutch packs together. All one would have to do is tap into the correct wires to see what signals cause the motor to drive in either direction. By doing so, you could set up a box or simple rheostat that manually drives the motor in either direction. You could have "full lock", "full unlock", and "auto mode". By driving the motor to full unlock it would theoretically be possible to have absolutely no damage to the clutches in the transfer case. The reason, as I understand, that the clutches eat themselves is becuase:

1) The original material is soft and prone to excessive wear (kevlar clutches would be in order).

2) When the ABS and Ediff fuses are disengaged, the motor does not drive fully out, it remains at 10% engagement causing excessive heat and wear when doing 2WD type stuff. This is also the reason that everyone's fluid is always black, becuase the clutches are always engaged at 10% during normal driving, grinding past one another when you go around turns.