Ram›4500 / 5500 Cab›2015›6.4L/ram/4500-5500-cab/2015/6-4l/

DP platform

2015 Ram 4500 / 5500 Cab — 6.4L

Factory specifications, fluid capacities, torque values, EPA fuel economy and the federal safety record for the 2015 4500 / 5500 Cab 6.4L.

Engine 6.4L

The 2015 Ram 4500 and 5500 Cab represent the heavy-duty workhorses of the DP platform, powered by a robust 6.4L engine that demands a substantial 7.0 quarts of 0W-40 API-rated oil to keep its operations running smoothly. Designed for demanding vocational applications, these trucks balance capability with a relatively low volume of owner-reported issues, though their eight recalls underscore the importance of staying current with manufacturer remedies. With only seven total owner complaints—primarily centered on wheels—this model year stands as one of the more dependable iterations in the series, offering fleet managers and tradespeople a proven option with fewer reliability red flags than earlier generations.

Quick specs

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

Engine oil capacity7.0 qtOEM · verified

Engine oil type0W-40 APIOEM · verified

Fitment & sizes

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

From the factory this vehicle uses OE oil filter 05083285AA. 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.

OE service part numbers OEM · verified

Engine oil filter	05083285AA alt 04892339BE
Engine air filter	68190705AB alt 53034051AB
Fuel filter	68157291AA alt 68197867AB
Spark plug	SP138239AC
Battery	BBH7F001AA
Front wiper blades	55277446AB
Serpentine belt	04627751AA alt 04627589AA
Thermostat	68534176AA alt 05086740AA

Service quick specs OEM factory data

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

This engine holds 7.0 qt of 0W-40 API engine oil, 310 in the differential, DOT 3 · DOT 3 · DOT 4 brake fluid. The firing order is 1-8-4-3-6-5-7-2. Note the cylinder-head bolts finish on a torque angle (torque-to-yield) — they stretch permanently and should be replaced, not reused, during any head service.

Lubricants & capacities

Automatic Transmission Fluid	ATF+4
Automatic Transmission Fluid Capacity	5.0-6.5
Brake Fluid	DOT 3 · DOT 3 · DOT 4
Differential Gear Oil	310
Differential Gear Oil Capacity	310 RBI Rear Axle
Engine Coolant Capacity	16.6
Engine Oil	synthetic · API · 0W-40 · MS-12633
Engine Oil Capacity	7.0 qt

Engine torques

Exhaust Manifold to Cylinder Head Bolts	32
Intake Manifold to Engine Bolts	9

Chassis torques

Leaf Spring to Axle (U-bolts)	360.0 ft-lbs
Leaf Spring to Chassis Bracket	360.0 ft-lbs
Leaf Spring to Rear Shackle	160.0 ft-lbs
Leaf Spring Rear Shackle to Chassis Bracket	317.0 ft-lbs

Ignition

Cylinder Firing Order	1-5-3-6-2-4
Cylinder Firing Order	1-8-4-3-6-5-7-2

Battery & A/C

Refrigerant	R134a
Refrigerant Capacity	18.08 lbs
Refrigerant	R134a
Refrigerant Capacity	1.18-1.38 lbs
Oil Group	PAG
Oil Type	46
Oil Capacity	6.00-6.10 oz
Refrigerant	R134a

Brakes

Brake Caliper Bolt to Carrier Torque	Front: 98; Rear: 98 /
Brake Caliper Carrier to Hub Bolt Torque	Front: 260; Rear: 190 /
ABS Sensor Torque	Front: 9.5; Rear: 17.3 /
Minimum Pad Thickness	Front: 0.040; Rear: 0.040 in
Vented Rotor Minimum Thickness for Replacement	1.472
Variation from Parallelism Thickness Variation	.0004
Maximum Rotor Runout	.0009

Multi-step torque procedures OEM · verified

Steering Track (Rod End) Bolts — tightening sequence 1 stages

105

Cylinder Head — tightening sequence 7 stages

1	Bolts 1-10	25 ft. lbs
2	Bolts 11-15	15 ft. lbs
3	Bolts 1-10	40 ft. lbs
4	Bolts 11-15	15 ft. lbs
5	Bolts 1-10	45 ft. lbs
6	Bolts 1-10	90 degrees
7	Bolts 11-15	25 ft. lbs

Factory maintenance schedule OEM · verified

Normal service, condensed from the factory interval matrix.

Under the factory schedule, replace the engine oil and filter every 15,000 mi; spark plugs every 100,000 mi.

Every 7,500 mi	Diesel Emissions Fluid (inspect fluid level) · Driveshaft U-Joint (lubricate) · Tie Rod (lubricate) · Tire & Wheel Assembly (rotate)
Every 8,000 mi	Battery (inspect) · Brake System (inspect) · Driveshaft U-Joint (lubricate) · Engine Coolant System (inspect fluid level) · Engine Coolant System Hoses (inspect) · Exhaust System (Complete) (inspect)
Every 15,000 mi	Engine Oil (drain & refill) · Engine Oil Filter (replace) · Fuel Filter (replace) · Suspension System (inspect)
Every 20,000 mi	Differential (inspect fluid level) · Drive Axle Assembly (inspect)
Every 22,500 mi	Accessory Drive Belt (inspect) · Brake Linings (inspect) · Parking Brake System (inspect)
Every 30,000 mi	CV Joint Boot (inspect) · Engine Air Filter Element (replace) · Transfer Case Assembly (inspect fluid level) · Transmission Assembly (drain & refill) · Wheel Bearing (inspect)
Every 67,500 mi	Engine Breather Filter (replace)
Every 97,500 mi	Power Steering System (drain, flush & refill)
Every 100,000 mi	PCV Valve (inspect) · Spark Plugs (replace)

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 required	DRBIII scan tool (dealer / locksmith)
Why	Transmitter 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 needed	After Sentry Key Immobilizer Module (SKIM) replacement
Tool required	DRBIII scan tool
Also required	The 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.

Owner complaints about the 2015 Ram 4500 / 5500 Cab top in one area — the wheels, 1 of 7 reports (14%), well ahead of the next concern. That matters, because the wheels are also the target of recall 21V-398 on this vehicle — so the single most useful check before buying or servicing one is confirming it was actually performed. 1 of the reports describe a crash and 2 a fire — a small share of the total, but worth weighing against the wheels pattern above. These are tallies of what owners actually reported to the federal government, not an editorial score — and higher-selling models naturally rack up more reports.

Open recalls

NHTSA campaigns

398

Service bulletins

Manufacturer communications

ODI investigations

Office of Defects Investigation

Owner complaints

1 involved a crash · 2 a fire

Owner complaints filed with NHTSA, by component

All 7 complaints on record, top 7 components.

Wheels1

Engine1

Unknown Or Other1

Power Train,Unknown Or Other,Service Brakes1

Steering,Suspension,Wheels1

Electrical System1

Service Brakes1

Source: NHTSA Office of Defects Investigation complaint database.

Recalls NHTSA · verified

Showing 2 of 8 campaigns on record for this vehicle.

18V332000Electrical System:WiringReported 17/05/2018

Chrysler (FCA US LLC) is recalling certain 2014-2018 Dodge Journey, Charger and Durango, RAM 2500, 3500, 3500 Cab Chassis (more than 10,000lb), 4500 Cab Chassis and 5500 Cab Chassis, Jeep Cherokee and Grand Cherokee and… Remedy: Chrysler will notify owners, and dealers will inspect the software, and perform a software flash on the engine or powertrain control module, free of charge. The recall began June…

21V398000Wheels:Lugs/Nuts/Bolts/StudsReported 27/05/2021

Chrysler (FCA US, LLC) is recalling certain 2012-2021 RAM 3500, 3500 Cab Chassis, 4500 Cab Chassis, and 5500 Cab Chassis vehicles. Incorrect information in the Service and Owner's Manuals may cause the flanged lug nuts… Remedy: Dealers will update the torque specification in the owner's manual and other published service documents. Dealers will also inspect the vehicle's wheel studs, replacing them if…

Technical service bulletins NHTSA · verified

Showing 5 of 398 bulletins on record with NHTSA.

Bulletin	Date	Component	Summary
S1203000003 REV.A	2026-06-26	Service Brakes	Trac-Rite Operation Diagnosis, Chatter, Shudder, Moving From A Stop And Turning
112906	2026-06-17	Engine	BEARING - CRANKSHAFT THRUST and KIT
112906	2026-06-17	Engine	BEARING - CRANKSHAFT THRUST and KIT
S1623000028 Rev. K	2026-06-12	Electrical System	Outside Power Fold Rearview Mirror Noise Or Loose At Pivot. Mirror Contacts Door Window…
S1623000028 REV.J	2026-06-05	Structure	Outside Power Fold Rearview Mirror Noise Or Loose At Pivot. Mirror Contacts Door Window…

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 4500 / 5500 Cab. 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.

Vehicles taking 7.0 qt DP-platform vehicles Engine oil filter 05083285AA Engine air filter 68190705AB Fuel filter 68157291AA Spark plug SP138239AC

Reference guides

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

Vehicle recalls & TSBs OBD-II trouble codes Torque specifications Maintenance schedules Fluid capacities & specs

Frequently asked

How much oil does the 2015 4500 / 5500 Cab 6.4L take?

7.0 qt of Full synthetic engine oils that meet the American Petroleum Institute categories of SN. The manufacturer recommends the use of Pennzoil UltraTM 0W-40 or equivalent MOPAR engine oil meeting the requirements of Chrysler Material Standard MS-12633 for use in all operating temperatures., per the factory manual.

Does the 2015 4500 / 5500 Cab have open recalls?

NHTSA lists 8 recall campaign(s) for this model year. Check your specific vehicle by VIN.