The 1987 Ford F250 featured a robust 4-speed manual transmission designed for heavy-duty towing and hauling applications. This transmission was known for its durability and reliable performance in various driving conditions. Below are detailed specifications, gear ratios, operation guidelines, and maintenance information for the 4-speed manual transmission system.
The 4-speed manual transmission in the 1987 F250 was designed for heavy-duty applications with synchronized gears in 2nd, 3rd, and 4th gears for smooth shifting.
| Feature | Description |
|---|---|
| Transmission Type | 4-speed manual with overdrive |
| Case Material | Cast iron housing |
| Gear Synchronization | 2nd, 3rd, 4th gears synchronized |
| Input Shaft | 10-spline design |
| Output Shaft | 31-spline heavy-duty |
| Shift Mechanism | Floor-mounted shift lever |
| Clutch Type | 11-inch diaphragm spring |
| Bearing Type | Tapered roller bearings |
| Lubrication | Splash lubrication system |
| Weight | Approximately 85 lbs |
Detailed gear ratios for the 4-speed manual transmission with overdrive.
| Gear | Ratio | Description |
|---|---|---|
| 1st Gear | 6.69:1 | Low gear for heavy loads and steep grades |
| 2nd Gear | 3.34:1 | Medium range for city driving and moderate loads |
| 3rd Gear | 1.79:1 | Direct drive for highway cruising |
| 4th Gear | 1.00:1 | Overdrive for fuel economy |
| Reverse | 6.69:1 | Same ratio as 1st gear for maximum reverse power |
| Final Drive | 3.55:1 or 4.10:1 | Available rear axle ratios |
Standard H-pattern shifting configuration for the 4-speed transmission.
WARNING! Do not force gears; ensure complete clutch engagement before shifting.
Key components of the 4-speed manual transmission system.
Proper operation techniques for the 4-speed manual transmission.
CAUTION! Avoid riding the clutch pedal and do not rest hand on shift lever during normal driving.
Recommended maintenance intervals for optimal transmission performance.
| Service | Interval | Procedure |
|---|---|---|
| Fluid Change | 30,000 miles | Drain and refill with specified gear oil |
| Clutch Adjustment | 15,000 miles | Check free play and adjust as needed |
| Linkage Inspection | 10,000 miles | Check for wear and proper adjustment |
| Seal Inspection | Oil change intervals | Check for leaks at input and output shafts |
| Bearing Inspection | 60,000 miles | Check for noise and excessive play |
Recommended fluids and capacities for the 4-speed manual transmission.
Common issues and solutions for the 4-speed manual transmission.
| Symptom | Possible Cause | Corrective Action |
|---|---|---|
| Hard shifting | Low fluid, worn synchronizers | Check fluid level, replace synchronizers if needed |
| Gear grinding | Worn clutch, damaged synchronizers | Adjust or replace clutch, inspect synchronizers |
| Transmission noise | Low fluid, worn bearings | Check fluid, replace worn bearings |
| Jumping out of gear | Worn shift forks, detent springs | Inspect and replace worn components |
| Fluid leaks | Worn seals, cracked case | Replace seals, repair case as needed |
Complete technical specifications for the 1987 F250 4-speed manual transmission.
The 1987 F250 4-speed manual transmission was covered by Ford's standard powertrain warranty of 5 years/50,000 miles. Contact Ford Customer Service for specific warranty claims and coverage details.
Service Support: 1-800-392-3673; www.ford.com