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Check your Automatic Transmission fluid level
No the transmission does not have a governor.
The automatic has one for the lock up torque converter
Don't bother, neither the manual or automatic use it
Best top speed for a stock V-6 Fiero: 135 mph Worst: 115 mph Both Fieros were '85 GT's, the latter with an automatic transmission.
Yes. The THM125C has a governor. The governor is just below the speedometer sensor. 1986 Pontiac fiero service manual section 125C page 22.
The Automatic was generally known as the THM125 The manual was built by Getrag
You will need a timing light, set it at 10 degrees BTD
The GT is cooler The 5 spd will get better fuel mileage and better racing times The auto is easier to drive, smoother and all around a more pleasant car.
Only one type of automatic transmission was used on the Fiero, the Turbo-Hydramatic-125C. The TH-125c is a 3 speed automatic. The C signifies that it has a torque converter clutch. In theory from a stop to cruising speed there should be a 1-2 shift a 2-3 shift. If you sense the transmission is hunting between 2 gears it is likely that the torque converter clutch is locking then releasing.
Keys are not necessary, but is not a DIY procedure. Contact a locksmith or mechanic
This is a large job and requires a manual, and removal of the engine from the car to do properly.