There is not a gear in the engine, they do have a speed limiter in the computer. Also some older automatic transmissions have a "governor" to adjust shift points.
85W90 gear oil.
Yes it will.
80W90 gear oil.
the wheel hops when it turns
Most likely, 355.
Any type of gear will wear over time..but bad maintenance won't help.
if you are looking for parts for any vehicle i recommend car-part.com
most common ratio is 373
U-joint is the first place to look. Second would be worn ring and pinion gear.
SAE 75W90 synthetic gear oil
The only governor I can think of is part of the automatic transmission the helps to control the shift points at which the transmission changes gear ratios.
What is the gear ratio on a 1996 2wd suburban 1500?