This article is from the Chrysler-Plymouth-Dodge FAQ, by Dr. David Zatz with numerous contributions by others.
(Courtesy Daniel Adams <email@example.com>)
On the new transmissions (e.g. 41TE), the numbers and letters actually
4 amount of forward gears
1 the torque rating for the trans (on a 1-8 scale 1 lowest 8 strongest)
t or r transaxle or rear wheel drive
e or h electronic or hydraulic
The 1999 Grand Cherokee will have an optional 5-speed automatic.
Transmission list with details on many types of transmission: