At a minimum, gasoline should meet ASTM specification D 4814. Some gasolines containan octane-enhancing additive called methylcyclopentadienyl manganese tricarbonyl (MMT).We recommend against the use of gasolines containing MMT. See “Prohibited Fuels" inRecommended Fuel.
Drive Range, First Gear Engine Braking Automatic Transmission Unit
When the gear selector lever is moved to the Drive-(D) range from the Neutral-(N)position, the transmission will provide engine braking. In this operating range, thenormally-low 1234-pressure control solenoid-5 is commanded ON and in the engine brakingmode the following changes occur within the hydr ...