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1985 Volvo 740 GL, GLE, Turbo
The spark plugs should be changed every 30,000 miles (50,000 km).
However, city driving or fast highway driving may necessitate changing after 7,500 miles (12,500 km)
of driving. When installing new plugs, be sure to fit the right type and use correct torque, see
"Specifications". When changing the plugs, check that the suppressor connectors are in good condition.
Cracked or damaged connectors should be replaced.
When changing spark plugs, clean the cables and cable terminals, also the rubber seals. If the car is
driven on roads where salt is used during the winter, coat the cables with silicone.
Ignition timing
The ignition timing is set electronically and cannot be adjusted.
pg. 99 Manual transmission, rear axle
Manual transmission with overdrive (M46)
Capacity: 2.4 US qts (2.3 liters)
Fluid type: Automatic Transmission Fluid Type F or G(FLM). Engine oil (SAE 10W/40 or 10W/30) is
recommended for use in areas where the temperature seldom drops below 14°F (-10°C).
Note! Do not mix ATF and engine oil.
Replace: at 600-1,200 mile (1,000-2,000 km)service only.
The oil level should be up to the filler plug. Drain the oil immediately after driving, while it is still hot,
by removing plug.
Transmission and overdrive are lubricated by the same oil. Therefore, when the oil is drained through
the drain plug, also remove cover on the overdrive and clean strainer.
Note: Refer to "Specifications" section of this manual for additional information on transmission.
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