The 1987 Toyota Supra features a robust manual transmission differential system designed for optimal performance and durability. This rear-wheel drive sports car utilizes a limited-slip differential with gear ratios optimized for the 7M-GE engine. The differential assembly includes final drive gears, pinion gears, and axle shafts engineered to handle the vehicle's torque output while providing smooth power delivery and reliable traction.
The 1987 Toyota Supra manual transmission differential features precision engineering for optimal performance characteristics.
| Specification | Details |
|---|---|
| Differential Type | Limited Slip Differential (LSD) |
| Gear Ratio | 3.73:1 (standard) |
| Case Material | Cast Aluminum Alloy |
| Axle Shaft Type | 31-spline forged steel |
| Ring Gear Diameter | 8 inches |
| Weight | Approximately 85 lbs |
| Compatible Transmissions | W58 5-speed manual |
| Torque Capacity | Up to 350 lb-ft |
| Lubricant Capacity | 1.5 quarts |
| Bearing Type | Tapered roller bearings |
Understanding the key components of the differential system is essential for proper maintenance and repair.
WARNING! Differential components operate under extreme pressure; handle with care during disassembly.
Proper installation ensures optimal performance and longevity of the differential system.
CAUTION! Use proper lifting equipment; differential assembly is heavy and requires secure handling.
Proper lubrication is critical for differential longevity and performance.
Recommended Fluids: Toyota Genuine Differential Fluid, 75W-90 GL-5 Gear Oil, Limited Slip Differential Additive
Capacity: 1.5 quarts (1.4 liters) including limited slip additive
Change Procedure: Warm differential, remove fill plug first, then drain plug, refill until fluid runs out fill hole
Important: Always use limited slip additive with GL-5 gear oil to prevent chatter
Common differential issues and their solutions for the 1987 Supra.
| Symptom | Possible Cause | Corrective Action |
|---|---|---|
| Whining noise | Worn ring and pinion gears | Inspect gear wear pattern, replace if necessary |
| Chattering in turns | Insufficient LSD additive | Drain and refill with proper LSD fluid |
| Fluid leaks | Worn axle seals or pinion seal | Replace seals, check breather tube |
| Vibration | Worn U-joints or improper torque | Check driveshaft U-joints, retorque fasteners |
| One wheel spin | Worn LSD clutch packs | Rebuild limited slip unit |
| Gear oil smell | Overheating differential | Install cooler or synthetic fluid |
| Knocking sound | Worn spider gears | Rebuild differential assembly |
Enhance your Supra's differential for improved performance and durability.
Note: Some upgrades may require professional installation and tuning.
Critical safety measures when working with differential systems.
WARNING! Always use jack stands; never work under vehicle supported only by jack. Wear safety glasses when servicing differential. Hot differential fluid can cause severe burns. Ensure parking brake is engaged and wheels are chocked. Use proper torque specifications for all fasteners.
The original differential was covered under Toyota's 5-year/60,000-mile powertrain warranty. Current replacement parts may have varying warranty coverage from manufacturers. Always retain receipts and follow maintenance schedules to preserve warranty coverage. For technical support, contact Toyota Customer Service at 1-800-331-4331 or visit www.toyota.com.