You have to remove the speedometer cable (follow it from the firewall, all the way down to the transmission) Remove the cable, then wiggle the speedometer gear out... add fluid there. Here's a link I found when I was looking into the same thing:
http://www.mx-3.com/phpBB3/viewtopic.php?f=1&t=70176&hilit=speedometer+cable
The gear oil is put in just to the right of the gearbox facing foward when you're under the car. It shouldn't be too hard.
The transmission is slipping/dying, take it to a certified mechanic..
yes, you will have to remove all the plastics from the 94 and put them into the 92, as well as the wiring.
bad ignitor or coil .
Put on your seatbelt!
don't accelerate as much or change up a gear
You have to push the key & ignition switch in as you rotate it counterclockwise into the off position !!
In the fuse box under the hood, driver's side
1-3-4-2 distribitor rotation: counterclockwise
Right hand thread
R12 -not sold in stores. can get filled or serviced at most auto repair shops.
check the power steering fluid, and check the battery