Back in 1991 I THINK that they still used a mechanical cable from the transmission to the speedometer. Only later did they change to electronic readout, but I'm not sure what year. It sounds like the speedo cable needs to be lubricated, possibly replaced.
You can get a speedometer cable for your 1990 Toyota pickup truck at most auto-parts stores. Many Toyota dealerships have auto part departments open to the public.
8.9 Quarts for a 1980 Toyota Pickup with a 20R.
The fuel filter is located on the firewall on a four cylinder 1995 Toyota pickup truck!
Nope 91 was the last year of that
on the passenger side of the transmission
waths the wey to torque the cylinder head
shudafup
Check coil pack.
Chain
116hp stock
What about the master cylinder? They go out, ha. That's all I can help you with though.
1342 number one being the front cylinder