Probably a bad driveshaft. Have it inspected at by a mechanic.
Sounds like you need to check your CV joints. To my knowledge a front wheel drive vehicle does not have a driveshaft.
Mercury Topaz was created in 1983.
check your crank sensor
the thermostat is underneath the manifold, follow the top radiator hose and unbolt the manifold. fairly simple.
Clean them and see.
picture of the fan relay for 1993 mercury topaz
where is the fuel reset swith for a 1989 mercury topaz
The 1994 Mercury Topaz has a chain and not a belt.
A 1991 mercury topaz has drum brakes on the rear wheels.
picture on how to replace a water pump for mercury topaz
does some one know the fireing block numbers for a 1994 mercury topaz 4
1994 mercury topaz 4cyl
how to set timing on 92 ford mercury topaz 2.3 engine