1990 Ford LN9000

1990 Ford LN9000

The 1990 Ford LN9000 is a medium-duty truck that is available with a variety of engine and transmission options. The most popular engine option is the 7.8L V8 diesel, which produces 220 horsepower and 520 lb-ft of torque. Other engine options include a 6.6L V8 diesel, a 7.5L V8 gasoline, and a 9.0L V8 gasoline. Transmission options include a 5-speed manual, a 6-speed manual, and a 4-speed automatic.

The LN9000 is popular for its durability and reliability. However, there are a number of common issues that owners have reported.

Engine

7.8L V8 Diesel

• Blown head gasket: This issue is caused by a failure of the head gasket, which allows coolant to leak into the engine. Symptoms include overheating, white smoke from the exhaust, and a loss of power. The solution is to replace the head gasket. Estimated cost to fix: $1,500 - $2,500+.
• Fuel injector failure: This issue is caused by a failure of the fuel injectors, which prevents fuel from being delivered to the engine. Symptoms include a lack of power, black smoke from the exhaust, and a rough idle. The solution is to replace the fuel injectors. Estimated cost to fix: $500 - $1,000+ per injector.
• Turbocharger failure: This issue is caused by a failure of the turbocharger, which reduces the amount of air that is delivered to the engine. Symptoms include a loss of power, black smoke from the exhaust, and a high-pitched whine. The solution is to replace the turbocharger. Estimated cost to fix: $1,500 - $2,500+.

6.6L V8 Diesel

• No common issues found.

7.5L V8 Gasoline

• Intake manifold gasket failure: This issue is caused by a failure of the intake manifold gasket, which allows air to leak into the engine. Symptoms include a loss of power, a rough idle, and a decrease in fuel economy. The solution is to replace the intake manifold gasket. Estimated cost to fix: $500 - $1,000+.
• Fuel pump failure: This issue is caused by a failure of the fuel pump, which prevents fuel from being delivered to the engine. Symptoms include a lack of power, a rough idle, and a stalling engine. The solution is to replace the fuel pump. Estimated cost to fix: $500 - $1,000+.

9.0L V8 Gasoline

• No common issues found.

Transmission

5-Speed Manual

• Clutch failure: This issue is caused by a failure of the clutch, which prevents the transmission from engaging. Symptoms include a slipping clutch, a grinding noise when shifting gears, and a loss of power. The solution is to replace the clutch. Estimated cost to fix: $1,000 - $1,500+.
• Transmission bearing failure: This issue is caused by a failure of the transmission bearings, which can lead to a number of problems, including gear grinding, difficulty shifting gears, and a loss of power. The solution is to rebuild the transmission. Estimated cost to fix: $2,000 - $3,000+.

6-Speed Manual

• Synchronizer failure: This issue is caused by a failure of the synchronizers, which prevents the transmission from shifting gears smoothly. Symptoms include difficulty shifting gears, a grinding noise when shifting gears, and a loss of power. The solution is to replace the synchronizers. Estimated cost to fix: $500 - $1,000+ per synchronizer.

4-Speed Automatic

• Torque converter failure: This issue is caused by a failure of the torque converter, which prevents the transmission from engaging. Symptoms include a slipping transmission, a lack of power, and a high-pitched whine. The solution is to replace the torque converter. Estimated cost to fix: $1,500 - $2,500+.
• Transmission fluid leak: This issue is caused by a leak in the transmission fluid lines, which can lead to a loss of transmission fluid. Symptoms include a slipping transmission, a lack of power, and a grinding noise when shifting gears. The solution is to replace the leaking transmission fluid lines. Estimated cost to fix: $200 - $500+.

Suspension

• Ball joint failure: This issue is caused by a failure of the ball joints, which can lead to a loss of control of the vehicle. Symptoms include a clunking noise when driving over bumps, a loose steering wheel, and uneven tire wear. The solution is to replace the ball joints. Estimated cost to fix: $500 - $1,000+ per ball joint.
• Spring failure: This issue is caused by a failure of the springs, which can lead to a loss of ride height and a decrease in handling. Symptoms include a sagging suspension, a rough ride, and a decrease in braking performance. The solution is to replace the springs. Estimated cost to fix: $500 - $1,000+ per spring.
• Shock absorber failure: This issue is caused by a failure of the shock absorbers, which can lead to a decrease in handling and a rough ride. Symptoms include a bouncy ride, a lack of stability when braking, and a decrease in cornering performance. The solution is to replace the shock absorbers. Estimated cost to fix: $300 - $600+ per shock absorber.

Electrical

• Battery failure: This issue is caused by a failure of the battery, which can prevent the vehicle from starting. Symptoms include a dead battery, a dim dashboard, and a lack of power. The solution is to replace the battery. Estimated cost to fix: $100 - $200+.
• Alternator failure: This issue is caused by a failure of the alternator, which prevents the vehicle from charging the battery. Symptoms include a dead battery, a dim dashboard, and a lack of power. The solution is to replace the alternator. Estimated cost to fix: $200 - $500+.
• Starter failure: This issue is caused by a failure of the starter, which prevents the vehicle from starting. Symptoms include a clicking noise when trying to start the vehicle, a dead battery, and a lack of power. The solution is to replace the starter. Estimated cost to fix: $200 - $500+.

Exterior

• Rust: This issue is caused by exposure to the elements, which can lead to the formation of rust on the body of the vehicle. Symptoms include peeling paint, bubbling paint, and holes in the body. The solution is to sand the rust off and repaint the vehicle. Estimated cost to fix: $500 - $2,000+.
• Dents: This issue is caused by impact with other objects, which can dent the body of the vehicle. The solution is to remove the dent using a dent puller or by replacing the damaged body panel. Estimated cost to fix: $200 - $1,000+ per panel.

Interior

• Cracked dashboard: This issue is caused by exposure to sunlight, which can cause the dashboard to crack. The solution is to replace the dashboard. Estimated cost to fix: $500 - $1,000+.
• Fading seats: This issue is caused by exposure to sunlight, which can cause the seats to fade. The solution is to replace the seats. Estimated cost to fix: $500 - $1,000+ per seat.

Summary

The 1990 Ford LN9000 is a reliable and durable truck. However, there are a number of common issues that owners have reported. The most serious issue is the blown head gasket, which can lead to catastrophic engine failure. Other common issues include fuel injector failure, turbocharger failure, clutch failure, transmission bearing failure, and ball joint failure. These issues can be expensive to fix, but they can be prevented by following a regular maintenance schedule.