INTRODUCTION
Use this article to quickly find specifications related to servicing and on-vehicle adjustments. This is a quick-reference article to use when you are familiar with an adjustment procedure and only need a specification.
BATTERY SPECIFICATIONS
| Application & Group | Cold Cranking Amps | Amp Hr. Rating |
|---|
| 8.0L | 750 | (1) |
| (1) Information not available at time of publication. |
| (1) | Information not available at time of publication. |
FLUID CAPACITIES
| Application | (1) Quantity |
|---|
| Automatic Transmission (Mopar ATF Plus Type 7176) |
| Drain & Refill | 4.0 Qts. (3.8L) |
| Dry Refill | (2) 17.0 Qts. (16.1L) |
| Cooling System (Includes Heater) | 26.0 Qts. (24.6L) |
| Crankcase (Includes Filter) (3) | 7.0 Qts. (6.6L) |
| Front Differential (SAE 80W-90/API GL-5) |
| Dana 44 (2500) | 6.8 Pts. (3.2L) |
| Dana 60 (2500 & 3500) | 7.6 Pts. (3.6L) |
| Manual Transmission (4) |
| NV4500 (Mopar M/T Lube P/N 4637579) (5) . | 4.0 Qts. (3.8L) |
| Power Steering Fluid (6) | 2.7 Pts. (1.3L) |
| Rear Differential (SAE 80W-90/API GL-5) (7) |
| 9 1/4" Ring Gear (2500) | 4.8 Pts. (2.3L) |
| Dana 60 (2500) | 6.3 Pts. (3.0L) |
| Dana 70 (2500) | 7.0 Pts. (3.3L) |
| Dana 80 (2WD) | 6.8 Pts. (3.2L) |
| Power Take-Off (PTO) Adapter (Mopar ATF Plus Type 7176) |
| 2WD With A/T | 4.6 Pts. (2.2L) |
| Transfer Case (Mopar ATF Plus Type 7176) (8) |
| NV231 HD | 2.5 Pts. (1.2L) |
| NV241 | 4.7 Pts. (2.2L) |
| NV241 HD | 6.5 Pts. (3.1L) |
| NV241 With Power Take-Off (PTO) | 9.0 Pts. (4.3L) |
| (1) Approximate quantity listed. (2) Quantity may vary by type of oil cooler/cooler lines. (3) Use engine oil with API SH or SH/CD rating for gasoline engines. Use API CE or CE/SG rating for diesel engines. (4) Verify type of transmission used before servicing. The NV3500 uses a flywheel housing which is an integral part of the transmission housing. The NV4500 uses a flywheel housing which is bolted to the front of the transmission and transmission contains a Power Take-Off (PTO) cover. (5) Heavy-duty transmission. (6) Use only Mopar power steering fluid. DO NOT use automatic transmission fluid. (7) Models with Trac-Lok or Power-Lok limited slip differentials must have Mopar Trac-Lok/Power-Lok Friction Modifier added if lubricant is changed. On all models except Dana 80 (4WD), 6 ozs. (.18L) of friction modifier is required. On Dana 80 (4WD) models, 10 ozs. (.30L) of friction modifier is required. (8) Transfer case may be identified by model number stamped on ID tag on rear of transfer case, just above filler plug. |
| (1) | Approximate quantity listed. |
| (2) | Quantity may vary by type of oil cooler/cooler lines. |
| (3) | Use engine oil with API SH or SH/CD rating for gasoline engines. Use API CE or CE/SG rating for diesel engines. |
| (4) | Verify type of transmission used before servicing. The NV3500 uses a flywheel housing which is an integral part of the transmission housing. The NV4500 uses a flywheel housing which is bolted to the front of the transmission and transmission contains a Power Take-Off (PTO) cover. |
| (5) | Heavy-duty transmission. |
| (6) | Use only Mopar power steering fluid. DO NOT use automatic transmission fluid. |
| (7) | Models with Trac-Lok or Power-Lok limited slip differentials must have Mopar Trac-Lok/Power-Lok Friction Modifier added if lubricant is changed. On all models except Dana 80 (4WD), 6 ozs. (.18L) of friction modifier is required. On Dana 80 (4WD) models, 10 ozs. (.30L) of friction modifier is required. |
| (8) | Transfer case may be identified by model number stamped on ID tag on rear of transfer case, just above filler plug. |
REPLACEMENT INTERVALS
| Component | Months | Miles |
|---|
| Air Filter |
| Normal Service | 30 | 30,000 |
| Severe Service | (2) | (3) 30,000 |
| Automatic Transmission Fluid, Filter & Band Adjustment |
| Normal Service | 24 | 24,000 |
| Severe Service | (2) | 12,000 |
| Battery |
| Normal Service | 60 | 60,000 |
| Severe Service | (2) | 60,000 |
| Coolant | (4) 36 | (4) |
| Engine Oil & Filter |
| Normal Service | 6 | 6000 |
| Severe Service | (2) | 3000 |
| Front Differential Fluid (4WD) (5) |
| Severe Service | (2) | 12,000 |
| Manual Transmission Fluid | (6) | (6) |
| Rear Differential Fluid (5) |
| Severe Service | (2) | 12,000 |
| Repack Front Wheel Bearings (2WD) |
| Normal Service | 24 | 24,000 |
| Severe Service | (2) | 24,000 |
| Spark Plugs |
| Normal Service | 30 | 30,000 |
| Severe Service | (2) | 30,000 |
| Spark Plug Wires |
| Normal Service | 60 | 60,000 |
| Severe Service | (2) | 60,000 |
| Transfer Case Fluid (4WD) |
| Normal Service | 36 | 36,000 |
| Severe Service | (2) | 36,000 |
| (1) Different interval is required for normal and severe service. Severe service is described as trailer towing, off-highway operation, snow removal operation, or operating in dusty or excessively hot conditions. (2) Monthly interval not available at time of publication. (3) Inspect air filter every 15,000 miles and replace as necessary. Replace at 30,000 miles unless previously replaced during inspection. (4) Replace coolant at 36,000 miles or 36 months whichever occurs first. Replace coolant at 36 months regardless of mileage. After first coolant change, replace coolant every 24 months or 30,000 miles thereafter. (5) Normal service interval not available at time of publication. Manufacturer lists service schedule only under severe service conditions. (6) Service interval not available at time of publication. |
| (1) | Different interval is required for normal and severe service. Severe service is described as trailer towing, off-highway operation, snow removal operation, or operating in dusty or excessively hot conditions. |
| (2) | Monthly interval not available at time of publication. |
| (3) | Inspect air filter every 15,000 miles and replace as necessary. Replace at 30,000 miles unless previously replaced during inspection. |
| (4) | Replace coolant at 36,000 miles or 36 months whichever occurs first. Replace coolant at 36 months regardless of mileage. After first coolant change, replace coolant every 24 months or 30,000 miles thereafter. |
| (5) | Normal service interval not available at time of publication. Manufacturer lists service schedule only under severe service conditions. |
| (6) | Service interval not available at time of publication. |
REPLACEMENT INTERVALS (1) (CALIF. - MEDIUM-DUTY)
| Component | Months | Miles |
|---|
| Air Filter |
| Normal Service | 24 | 24,000 |
| Severe Service | (2) | (3) 12,000 |
| Air Injection Pump Filter |
| Normal Service | 24 | 24,000 |
| Severe Service | (2) | (3) 12,000 |
| Automatic Transmission Fluid, Filter & Band Adjustment |
| Normal Service | 24 | 24,000 |
| Severe Service | (2) | 12,000 |
| Battery |
| Normal Service | 60 | 60,000 |
| Severe Service | (2) | 60,000 |
| Coolant | (4) 36 | (4) |
| Engine Oil |
| Normal Service | 6 | 6000 |
| Severe Service | (2) | 3000 |
| Engine Oil Filter |
| Normal Service | 6 | 6000 |
| Severe Service | (2) | 3000 |
| Front Differential Fluid (4WD) (5) |
| Severe Service | (2) | 12,000 |
| Manual Transmission Fluid | (6) | (6) |
| Rear Differential Fluid (5) |
| Severe Service | (2) | 12,000 |
| Repack Front Wheel Bearings (2WD) |
| Normal Service | 24 | 24,000 |
| Severe Service | (2) | 24,000 |
| Spark Plugs |
| Normal Service | 30 | 30,000 |
| Severe Service | (2) | 30,000 |
| Spark Plug Wires |
| Normal Service | 60 | 60,000 |
| Severe Service | (2) | 60,000 |
| Transfer Case Fluid (4WD) |
| Normal Service | 36 | 36,000 |
| Severe Service | (2) | 36,000 |
| (1) Different interval is required for normal and severe service. Severe service is described as trailer towing, off-highway operation, snow removal operation, or operating in dusty or excessively hot conditions. (2) Monthly interval not available at time of publication. (3) Inspect filter every 12,000 miles and replace as necessary. Replace at 24,000 miles unless previously replaced during inspection. (4) Replace coolant at 36,000 miles or 36 months whichever occurs first. Replace coolant at 36 months regardless of mileage. After first coolant change, replace coolant every 24 months or 30,000 miles thereafter. (5) Normal service interval not available at time of publication. Manufacturer lists service schedule only under severe service conditions. (6) Service interval not available at time of publication. |
| (1) | Different interval is required for normal and severe service. Severe service is described as trailer towing, off-highway operation, snow removal operation, or operating in dusty or excessively hot conditions. |
| (2) | Monthly interval not available at time of publication. |
| (3) | Inspect filter every 12,000 miles and replace as necessary. Replace at 24,000 miles unless previously replaced during inspection. |
| (4) | Replace coolant at 36,000 miles or 36 months whichever occurs first. Replace coolant at 36 months regardless of mileage. After first coolant change, replace coolant every 24 months or 30,000 miles thereafter. |
| (5) | Normal service interval not available at time of publication. Manufacturer lists service schedule only under severe service conditions. |
| (6) | Service interval not available at time of publication. |
REPLACEMENT INTERVALS (1) (FEDERAL - HEAVY-DUTY)
BELT ADJUSTMENT
Note. Automatic belt tensioner is used. Belt tension adjustment is not required.
ENGINE COMPRESSION
Check engine compression with engine at normal operating temperature at specified cranking speed, all spark plugs removed and throttle wide open.
| Application | Specification |
|---|
| Compression Ratio | 8.4:1 |
| Compression Pressure | 170-190 psi (1172-1310 kPa) |
| Minimum Compression Pressure | 100 psi (690 kPa) |
| Maximum Variation Between Cylinders | 25 psi (172 kPa) |
COMPRESSION SPECIFICATIONS
VALVE CLEARANCE
Engine is equipped with hydraulic lifters. No adjustments are required.
IGNITION COIL
| Application | Primary | Secondary |
|---|
| 8.0L | .53-.65 | 10,900-14,700 |
IGNITION COIL RESISTANCE - Ohms @ 70-80°F (21-27°C)
HIGH TENSION WIRE RESISTANCE
| Application | Ohms |
|---|
| All High Tension Wires | (1) |
| (1) Resistance should be 250-1000 ohms per one inch, or 3000-12,000 ohms per 12 inches. |
| (1) | Resistance should be 250-1000 ohms per one inch, or 3000-12,000 ohms per 12 inches. |
HIGH TENSION WIRE RESISTANCE
SPARK PLUGS (TYPE)
| Application | Champion No. |
|---|
| 8.0L | QC9MC4 |
| (1) Check spark plug application on underhood vehicle emission control label. If application differs from application listed, use application on underhood vehicle emission control label. |
| (1) | Check spark plug application on underhood vehicle emission control label. If application differs from application listed, use application on underhood vehicle emission control label. |
SPARK PLUG SPECIFICATIONS
| Application | Gap In. (mm) | Torque Ft. Lbs. (N.m) |
|---|
| 8.0L | .045 (1.14) | 30 (41) |
| (1) Check plug gap specification on underhood vehicle emission control label. If spec differs from that listed above, use specification on underhood vehicle emission control label. |
| (1) | Check plug gap specification on underhood vehicle emission control label. If spec differs from that listed above, use specification on underhood vehicle emission control label. |
SPARK PLUG SPECIFICATIONS (1)
Firing Order. Scheme 5
IGNITION TIMING
Note. Ignition timing is controlled by Powertrain Control Module (PCM). Ignition timing is non-adjustable. DO NOT attempt to adjust ignition timing.
FUEL PUMP
| Application | Pressure psi (kPa) | Min. Vol. In One Minute Pts. (L) |
|---|
| Ram Pickup | (1) 44-54 (303-373) | (2) |
| (1) Manufacturer lists fuel pressure with engine off, ignition on and using scan tool to activate fuel pump. (2) Information not available at time of publication. |
| (1) | Manufacturer lists fuel pressure with engine off, ignition on and using scan tool to activate fuel pump. |
| (2) | Information not available at time of publication. |
INJECTOR RESISTANCE
| Application | Ohms @ 68°F (20°C) |
|---|
| 8.0L | 13.3-15.7 |
IDLE SPEED & MIXTURE
Note. Idle speed and mixture are controlled by Powertrain Control Module (PCM). No adjustment is required.
| Application | RPM |
|---|
| 8.0L | (1) |
| (1) Idle speed is non-adjustable. |
| (1) | Idle speed is non-adjustable. |
IDLE SPEED SPECIFICATIONS
THROTTLE BODY MINIMUM AIRFLOW IDLE SPEED
| Application | RPM |
|---|
| 8.0L | (1) |
| (1) Does not apply to this application. |
| (1) | Does not apply to this application. |
THROTTLE BODY MINIMUM AIRFLOW IDLE SPEED SPECIFICATIONS
THROTTLE POSITION SENSOR VOLTAGE SPECIFICATIONS
| Throttle Opening | (1) (2) Volts |
|---|
| At Idle | Greater Than .20 |
| At Full Throttle | Less Than 4.80 |
| (1) Measure voltage at center terminal on throttle position sensor with ignition on. (2) Voltage should increase smoothly when moving throttle from idle to full throttle. |
| (1) | Measure voltage at center terminal on throttle position sensor with ignition on. |
| (2) | Voltage should increase smoothly when moving throttle from idle to full throttle. |
THROTTLE POSITION SENSOR VOLTAGE SPECIFICATIONS
