Check the fuses, if fuses are okay, it is probably the VSS (Vehicle Speed Sensor) or wiring to it At Fault.
Most likely speedometer cable
I have the same problem hope someone tells us what to do Mel
There isn't a transmission capacity the only thing you go by is the amount of gears it has.
I assume you have a cable speedometer. If so, just follow the cable on the firewall in the engine compartment to the transmission. When you take the cable out there is a small gear in there. That's it.
Transmission shift linkage installed incorrectly or out of adjustment.
Dexron 3 will do just fine.
Possibly. Look at the model # on each transmission. If they are the same, then they are interchangeable.
Mercury Topaz was created in 1983.
The 1993 Mercury manual transmission linkage will have adjustment nuts on each end of the linkage. Turning the adjustment nuts will move the linkage back in forth.
The switching is done within the transmission by internal pressure. YOu may just be low on fluid. I have had this happen to my 93 topaz three times (plus a fourth that happened before I got the car). Every time it happened the fluid level was full. The tranny used (ATX) on the topaz has a governor on it. If the governor is not set right it will not shift. I have had to have the governor gear replaced Dec. 2005 because of this. Once you have one problem with the transmission you may have problems the rest of the car's life. I am now on my 4th transmission.
where is the fuel reset swith for a 1989 mercury topaz
Battery + cable goes to one of the large posts Starter cable goes to the other Large post Trigger wire goes to the small post (if there are 2 disregard 2nd)