DodgeRAM Pickup19983.9L V6/dodge/ram-pickup/1998/3-9l-v6/
BR platform

1998 Dodge RAM Pickup — 3.9L V6

Factory specifications, fluid capacities, torque values, EPA fuel economy and the federal safety record for the 1998 RAM Pickup 3.9L V6.

Engine 3.9L V6Transmission Automatic 4-spd

The 1998 Dodge RAM Pickup rides on the BR platform powered by a 3.9L V6 paired with a four-speed automatic, a configuration that requires 4.0 quarts of 10W-30 or 5W-30 API oil and carries EPA fuel-economy ratings of 14 mpg city and 18 mpg highway. Within the 1995–2002 model run, this year generated 20 owner complaints—a moderate count compared with the generation’s peak of 33 in 1999 and low of 8 in 2000—and recorded zero recalls, positioning it as a relatively uneventful entry in the line’s reliability history.

Model year199919981997199619951994

Quick specs

Fluid capacities, tune-up values and fuel economy at a glance.

Engine oil capacity4.0 qtOEM · verified
Engine oil type10W-30 / 5W-30 APIOEM · verified
Lug nut torque130-160 ft-lbsOEM · verified
EPA fuel economy14/18/16 mpgEPA · verified

Fitment & sizes

Replacement part sizes and factory part numbers — battery, bulbs, filters and belts.

From the factory this vehicle uses a BCI 27 · 600 CCA battery, OE oil filter 05281090AB. Note the factory fuel filter and front wiper blades are now discontinued — plan on a superseded or quality aftermarket equivalent, which the part pages below list where known. Each part links to every other vehicle that shares it, so a part you already stock may fit more of your fleet than you'd expect.

Battery groupBCI 27 · 600 CCAOEM · verified
Tire size6400 GVWROEM · verified
Wheel / rim9 inOEM · verified

OE service part numbers OEM · verified

Engine oil filter05281090AB
Engine air filter53004383AC
Fuel filter04798825AD discontinued
Spark plug68303921AA
BatteryBB27F101AA alt BB34U900AA
Front wiper blades55076910AA discontinued
Serpentine belt53010303AC alt 53010304AB
Thermostat52028185AC alt 53021051AB

Full specifications

Engine, drivetrain, dimensions and economy.

Engine & drivetrain NHTSA vPIC

TransmissionAutomatic 4-spd

Dimensions & weight NHTSA vPIC

Overall length240.2 in
Overall width79.5 in
Overall height71.7 in
Wheelbase154.7 in
Curb weight4795 lb
Track (front / rear)66.5 / 66.9 in

Ratings & economy EPA / vPIC

EPA city / highway / combined14 / 18 / 16 mpg
DrivetrainRear-Wheel Drive
Recommended fuelRegular Gasoline

Service quick specs OEM factory data

Capacities, torques and tune-up values from the factory service manual.

This engine holds 4.0 qt of 10W-30 / 5W-30 API engine oil, 75W-90 · GL-5 in the differential, DOT 3 brake fluid. Torque lug nuts to 130-160 ft-lbs, the oil drain plug to 25.0 ft-lbs.

Lubricants & capacities

Brake FluidDOT 3
Differential Gear Oil80W-90 · GL-5
Differential Gear Oil Capacity7.6 Pints,
Differential Gear Oil75W-90 · GL-5
Differential Gear Oil Capacity4 Pints,
Differential Gear Oil75W-90 · GL-5
Differential Gear Oil Capacity7.5 Pints, non_mvc
Engine CoolantETHYLENE GLYCOL

Engine torques

Connecting Rod (Large End) Bearings45 ft-lbs
Cylinder Head StepsStep 1 -
Engine Flywheel Bolts55 ft-lbs
Main Bearings85 ft-lbs
Engine Oil Pan Drain Plug25.0 ft-lbs
Oil Pump to Cylinder BLock Bolts/Studs30 ft-lbs

Chassis torques

Leaf Spring to Axle (U-bolts)6010
Leaf Spring to Chassis Bracket6010
Leaf Spring to Rear Shackle6010
Leaf Spring Rear Shackle to Chassis Bracket6010
Lug Nuts130-160 ft-lbs
Transfer Case Fill Plug30.0-40.0 ft-lbs
Transfer Case Drain Plug30.0-40.0 ft-lbs
Front Wheel Hub180 ft-lbs

Ignition

Curb Idle Speed (No Load)700 rpm
Curb Idle Speed Variance (No Load)200 rpm
Spark Plug Gap0.040 in
Spark Plug Torque30.0 ft-lbs

Battery & A/C

RefrigerantR134a
Refrigerant Capacity2.00 lbs
Oil GroupPAG
Oil TypeSP-10
Oil Capacity8.10 oz
Standard BCI Group Number27
Standard BCI Cranking Performance600 cca
Optional BCI Group Number27

Service checks

Pressure Test15 psi
Radiator Cap Pressure Relief14-18 psi
Thermostat Opening Temperature192-199 °F
Fuel Pump Pressure Minimum54.0 psi
Regulated Fuel System Pressure (With Vacuum)44.0-54.0 psi
Injector Primary Resistance10.8-13.2 @ 68 degreesF ohms
Engine Compression100 Minimum psi
Engine Oil Pressure30-80 psi

Brakes

Torque to Knuckle38 ft-lbs
Torque to Knuckle38 ft-lbs
OtherHeavy Duty
Torque to Knuckle38 ft-lbs
OtherLight Duty / Heavy Duty
Torque to Knuckle38 ft-lbs
Torque to Knuckle38 ft-lbs
Rotor Max Parallel Variation0.001 in

Factory maintenance schedule OEM · verified

Normal service, condensed from the factory interval matrix.

Under the factory schedule, replace the coolant every 30,000 mi. The big-interval services (every 30,000 mi for coolant, and the transmission fluid) are the ones owners most often skip — on a lower-mileage example, assume the original fluids are still in it and check them first.

Every 6,000 miBrake Line (inspect) · CV Joint Boot (inspect) · Differential (inspect fluid level) · Driveshaft U-Joint (lubricate) · Engine Coolant System (leak inspection) · Exhaust System (Complete) (inspect)
Every 18,000 miBrake Linings (inspect)
Every 24,000 miBands (adjust) · Transmission Fluid & Filter (replace)
Every 30,000 miEngine Coolant System (drain, flush & refill)
At 60,000 miEngine Coolant System (drain, flush & refill) · PCV Valve (inspect)
Every 60,000 miPCV Valve (inspect)

Owner how-tos

Condensed service procedures for routine maintenance. Procedures that require dealer diagnostic equipment are identified and summarized only.

Common procedures

Key fob — remote (RKE) programming programming new fob buttons Dealer tool OEM · verified
Tool requiredDRBIII scan tool (dealer / locksmith)
WhyTransmitter codes are written into the receiver in the passenger door module
Anti-theft (SKIS) — module initialization after immobilizer module replacement Dealer tool OEM · verified
When neededAfter Sentry Key Immobilizer Module (SKIM) replacement
Tool requiredDRBIII scan tool
Also requiredThe vehicle's four-digit PIN code

Reliability & federal safety record

Owner-reported issues, recalls, investigations and service bulletins on record with NHTSA — an unfiltered look at what owners actually experience.

Across this generation, federal complaints trended sharply upward from 9 in 1995 to a peak of 33 in 1999, before dropping to 8 in 2000 and rising again to 24 in 2002. The 1998 model year sits directly at the beginning of this escalation, doubling the 1995 complaint count to 20 with zero recalls or investigations. The 1998 data shows specific vulnerabilities in Structure (4 complaints), Air Bags (3), and Power Train (2), alongside one crash and one fire complaint, though the data does not specify the root causes. This positions the 1998 RAM as a transitional model where emerging issues foreshadowed the much higher complaint volume seen in the subsequent year. Consequently, the 1998 Dodge RAM Pickup is a relatively risky year to purchase used, and buyers would be better served seeking the lower-complaint 2000 model year instead.

0
Open recalls
NHTSA campaigns
12
Service bulletins
Manufacturer communications
0
ODI investigations
Office of Defects Investigation
20
Owner complaints
1 involved a crash · 1 a fire
Owner complaints by model year NHTSA · this generation & adjacent

Owner complaints filed with NHTSA, by component

All 20 complaints on record, top 8 components.

Structure4
Air Bags3
Power Train2
Fuel System, Gasoline1
Seat Belts1
Engine & Engine Cooling,Power Train1
Electrical System,Exterior Lighting,Latches/Locks/Linkages,Vehicle Speed Control1
Steering1

Source: NHTSA Office of Defects Investigation complaint database.

Recalls NHTSA · verified

No recall campaigns on record with NHTSA for this vehicle as of the last data refresh.

Technical service bulletins NHTSA · verified

Showing 5 of 12 bulletins on record with NHTSA.

BulletinDateComponentSummary
90028492014-09-03EquipmentPart Description: Insulator on Lever Assy Manual Valve - Valve Body - RWD Transmission…
08010032003-04-25Seat BeltsSEAT BELT CINCH BAR SERVICE FOR VARIOUS MODELS INCLUDING 2004 MODELS. *TT
14002032003-04-11Fuel System, DieselDIESEL FUEL TRANSFER PUMP DIAGNOSIS. *TT
08010012001-05-25Electrical SystemSUBJECT REGARDING AIRBAG / CLOCK SPRING SERVICE FOR VARIOUS MODELS INCLUDING 2002 MODEL…
0827002000-09-29Air BagsSUBJECT REGARDING NON-DEPLOYED AIRBAG HANDLING PROCEDURES. *TT

Common OBD-II trouble codes

The most common OBD-II codes for this vehicle's emissions system. These are standardized SAE J2012 definitions, not vehicle-specific fault reports.

P0420
Catalyst system efficiency below threshold — Bank 1
P0300
Random / multiple cylinder misfire detected
P0171
System too lean — Bank 1
P0455
Evaporative emission system leak detected — large leak
P0128
Coolant thermostat below regulating temperature
P0442
Evaporative emission system leak detected — small leak

VIN tools

Decode factory build data for a specific vehicle by VIN.

VIN
Decode a VIN to confirm the transmission and build data for a specific RAM Pickup. OEM
Build data
Plant, GVWR class, engine and body data for any 17-character VIN.
Recalls
Check open recall campaigns against a specific vehicle by VIN.

Vehicles with shared specs

Find every vehicle that shares this one's battery, bulbs, oil capacity, platform or parts.

Reference guides

Cross-vehicle references for the kinds of data on this page.

Frequently asked

How much oil does the 1998 RAM Pickup 3.9L V6 take?

4.0 qt of Above 0 F: 10W-30 API, Below 32 F: 5W-30 API, per the factory manual.

Does the 1998 RAM Pickup have open recalls?

NHTSA lists 0 recall campaign(s) for this model year. Check your specific vehicle by VIN.

What gas mileage does the 3.9L V6 get?

EPA figures are 14 city / 18 highway / 16 combined mpg.