Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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1991 Ford Ranger 2D Pickup, 4.0 X, 4WD
Quick Lookups: Fluids
1991 Ford Ranger 2D Pickup, 4.0 X, 4WDSECTION Fluids
| FLUID CAPACITIES | |||||||
|---|---|---|---|---|---|---|---|
| Fluid Type | Application | Standard | Metric | Fluid Spec | Note | S/H | |
| Air Cond Refrigerant | 1.75 LBS. | 0.79 KG | R-12 | S | |||
| Automatic Transmission Fluid | 4WD | 10.00 QTS. | 9.46 L | Automatic Transmission Fluid MERCON | S | ||
| Brake Fluid | N/A | N/A | MOTORCRAFT High Performance DOT 3 Motor Vehicle Brake Fluid | Fill to line on reservoir. | S | ||
| Differential Gear Oil | 4WD | Front,Dana 28 | 1.10 PTS. | 0.52 L | FORD Hypoid Gear Oil | Fill with 17 oz. to bottom of fill hole. | S |
| Differential Gear Oil | 4WD | Front,Dana 35 | 3.50 PTS. | 1.65 L | FORD Hypoid Gear Oil | Fill with 56 oz. to bottom of fill hole. Add .5 oz. of Friction Modifier (EST- M2C118-A). | S |
| Differential Gear Oil | Rear,Ford Conventional & Traction-Lok 7.5" | 5.00 PTS. | 2.36 L | FORD Hypoid Gear Oil | Fill 1/4" to 9/16" (6 mm to 14 mm) below bottom of fill hole. Add 4 oz. of EST-M2C118-A Friction Modifier. | S | |
| Differential Gear Oil | Rear,Ford Conventional & Traction-Lok 8.8" | 5.30 PTS. | 2.5 L | FORD Hypoid Gear Oil | Fill 1/4" to 9/16" (6 mm to 14 mm) below bottom of fill hole. Add 4 oz. of EST-M2C118-A Friction Modifier. | S | |
| Engine Coolant | 4.0L Eng | w/Air Cond | 8.60 QTS. | 8.13 L | 50/50 mixture of FORD Premium Cooling System Fluid and water | S | |
| Engine Coolant | 4.0L Eng | w/o Air Cond | 7.80 QTS. | 7.38 L | 50/50 mixture of FORD Premium Cooling System Fluid and water | S | |
| Engine Oil | 5.00 QTS. | 4.73 L | SAE 10W-30/40 (0Deg.F to 100Deg.F), 20W-40/50 (20Deg.F to Above 100Deg.F). SAE 30 Single Weight Super Duty, 10W-40 Super Premium, 20W-40 Premium | S | |||
| Fuel Tank | Pickup | 16.30 GALS. | 61.7 L | S | |||
| Power Steering Fluid | N/A | N/A | Automatic Transmission Fluid Type F | Fill to line on dipstick. | S | ||
| Transfer Case Fluid | 4WD | 1.25 QTS. | 1.18 L | MOTORCRAFT Automatic Transmission Fluid MERCON | S | ||
| Windshield Washer Fluid | N/A | N/A | Ultra-Clear Windshield Washer Fluid | Follow the Manufacturer's Instructions for the mixture ratio. | S | ||
RENDER: 1.0x
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.