The AT in the old Cherokee was the Aisin-Warner AW-4, and yes its related to the Aisin-Sekei automatics used in rear-drive Toyotas. But it was ONLY used behind the 4.0 six cylinder in the Grand Cherokee (190 HP), never behind the v8 (220 HP for the 5.2 starting in 1992-3). The early 5.2 Grand Cherokee v8s got the Chrysler 43RH, and then starting with the 4.7L and later the Hemi, they the 45RFE and ultimately the
545RFE which is also used in Ram pickups.The AW-4 was pretty solid and reliable, very well suited to serious off-roading in the Cherokee if you give it a big enough fluid cooler. But it was a bit weak in the knees for the added weight of the Grand Cherokee, and in all forms it shifted like the true definition of a sludgebox. Its the reason I went out of my way to find a Cherokee with a
5-speed (AX-15, also built by Aisin, but its on its last legs and will be replaced by an NV3550 from a 2000 or newer Jeep).