I have a 1993 Mitsubishi 3000gt and the TCU is located under the console / dash. It is mounted by a metal bracket to the floor pan. You will need to remove the side carpet panels and the entire front console to access the TCU.
The TCM is located behind the center console (same as eclipse, lazer talon).
tcm locatation on 2001 intreped
where the location the TCM unit in mitsubishi sport 2000
Driver side (inside) below dash
It is located under the carpet on the passenger side floor. (under dash) there are two computers you will see. The TCM is the one on the right
A 96 GC has the TCM as an integral part of the PCM for both 6 and V8 models. On some earlier 6 cylinder Grand Cherokees, the TCM is separate and is bolted to the firewall; nuts to remove are next to the brake booster, under the hood, tho the TCM on these is inside the vehicle.
TCM Underground was created in 2006.
TCM Nordic was created in 1998.
TCM Fuse = Transmission Control Module
On my 1995 it is under the the dash where the clutch would be located. It is chrome colored and has plugin visible. I am certain the 1992 is identical.
you can know more TCM knowledge:www.tcmdiscovery.com
TCM Transmission Control Module