Ok, here is the accurate info.....
The ONLY year you could find a 1.6 8V engine in a 4 door is 91. If it had the auto (which will be a 3 speed, and also the only year you could find a 3 speed auto in a 4 door.....all other year 4 doors with autos had the 4 speed auto), it will have 4.62 gears. If it has the 5 speed, then it has 5.38 gears.
92-98 4 door trackicks all had either the 1.6 16V (regular trackicks), or the 1.8 16V (96-98 sidekick sports). Personally, I would not get a sidekick sport....because the 1.8 engine is hard to find reasonably priced used parts for.
All the 4 doors from 91-98 are going to weigh basically the same (within a few hundred pounds...maybe even closer).
All 4 door trackicks from 92-98 have 5.12 gears, no matter what tranny they have.