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.
1990 Jeep Wrangler Laredo, AutomaticFACTORY OEM SERVICE PROCEDURE
Engine Controls - Specifications: Capacities
BATTERY SPECIFICATIONS
| Application | Cold Crank Amps @ 0°F (-18°C) | Reserve Capacity Minutes | |
|---|---|---|---|
| YJ Vehicles | |||
| Standard Duty | 421 | 75 | |
| Heavy Duty | 452 | 81 | |
| XJ & MJ Vehicles | |||
| Standard Duty | 390 | 75 | |
| Heavy Duty | 475 | 82 | |
| SJ Vehicles | 475 | 82 | |
FLUID CAPACITIES
| Application | (1) Quantity | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Crankcase (2) | |||||||||||||||
| 2.5L | 4.0 Qts. (3.8L) | ||||||||||||||
| 4.0L/4.2L | 6.0 Qts. (5.7L) | ||||||||||||||
| 5.9L | 5.0 Qts. (4.7L) | ||||||||||||||
| Cooling System (Includes Heater) | |||||||||||||||
| 2.5L (Cherokee & Comanche) | 10.0 Qts. (9.5L) | ||||||||||||||
| 2.5L (Wrangler) | 9.0 Qts. (8.5L) | ||||||||||||||
| 4.0L | 12.0 Qts. (11.4L) | ||||||||||||||
| 4.2L | 10.5 Qts. (9.9L) | ||||||||||||||
| 5.9L | 15.5 Qts. (14.7L) | ||||||||||||||
| Automatic Transmission (Mercon or Dexron-II) (3) | |||||||||||||||
| AW-4 | 8.5 Pts. (4.0L) | ||||||||||||||
| 727 | 8-10 Pts. (3.8-4.7L) | ||||||||||||||
| 999 | 8.0 Pts. (3.8L) | ||||||||||||||
| Manual Transmission (API GL-5 75W-90) | |||||||||||||||
| AX-4 - 2 WD 4 Speed | 7.8 Pts. (3.7L) | ||||||||||||||
| AX-5 - 4 WD 5 Speed | 7.0 Pts. (3.3L) | ||||||||||||||
| AX-15 - 4 WD 5 Speed | 6.6 Pts. (3.1L) | ||||||||||||||
| AX-5 - 2 WD 5 Speed | 7.4 Pts. (3.5L) | ||||||||||||||
| AX-15 - 2 WD 5 Speed | 6.7 Pts. (3.2L) | ||||||||||||||
| Front/Rear Axles (API GL-5 75W-90) | |||||||||||||||
| Cherokee & Wagoneer (4) | 2.5 Pts. (1.2L) | ||||||||||||||
| Comanche & Wrangler (5), (6) | 2.5 Pts. (1.2L) | ||||||||||||||
| Comanche & Wrangler (HD Axle) (5), (6) | 3.0 Pts. (1.4L) | ||||||||||||||
| Grand Wagoneer (5), (6) | 3.8 Pts. (1.8L) | ||||||||||||||
| Transfer Case (Mercon or Dexron-II) | |||||||||||||||
| Selec-Trac 242 | 3.0 Pts. (1.4L) | ||||||||||||||
| Command-Trac 231 | 2.2 Pts. (1.0L) | ||||||||||||||
| Command-Trac 231 (Wrangler) | 3.3 Pts. (1.5L) | ||||||||||||||
| Model 229 | 6.0 Pts. (2.8L) | ||||||||||||||
| Fuel Tank | |||||||||||||||
| Cherokee & Wagoneer | 20.2 Gals. (76.4L) | ||||||||||||||
| Comanche | |||||||||||||||
| Short Bed | 18.5 Gals. (70.0L) | ||||||||||||||
| Long Bed | 23.5 Gals. (89.0L) | ||||||||||||||
| Grand Wagoneer | 20.3 Gals. (76.8L) | ||||||||||||||
| Wrangler | 20.0 Gals. (75.7L) | ||||||||||||||
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Factory Service Tools
Use the Manual With the Right Hardware
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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.
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