Dodge RAM 1500 DIY Maintenance Guide

The RAM 1500 is America's second best-selling truck — and one of the most DIY-friendly full-size pickups on the market. Whether you're running the 5.7L Hemi, the 3.6L Pentastar V6, or the 3.0L EcoDiesel, the RAM has generous engine bay access, a straightforward layout, and a huge aftermarket. Dealers charge $150–$200 for basic services you can knock out in your driveway in under an hour.

This guide covers every major service item — with exact specs.

---

Oil Change (5.7L Hemi)

The Hemi is a legendary engine, but it needs clean oil. RAM recommends 5W-20 full synthetic for the 5.7L in most climates (check your door jamb sticker — some late models call for 0W-20).

Capacity: 7.0 quarts with filter Filter: Mopar MO-285 or FRAM PH16 equivalent Drain plug torque: 20 ft-lbs (M14x1.5 plug, aluminum pan — do not overtighten) Oil change interval: 6,000–10,000 miles depending on driving conditions (RAM OLM system)

DIY cost: $45–$70 in Pennzoil Platinum or Mobil 1 5W-20 + filter Shop cost: $110–$160 at a RAM dealer, $80–$100 at Jiffy Lube

V6 (3.6L Pentastar) Specs

• Oil: 5W-20 full synthetic, 5.9 qt with filter
• Drain plug torque: 20 ft-lbs
• Filter: Mopar MO-499 or equivalent

EcoDiesel (3.0L) Specs

• Oil: 0W-40 or 5W-40 full synthetic diesel-rated (API CK-4)
• Capacity: 10.5 quarts with filter
• Drain plug torque: 22 ft-lbs
• Interval: 8,000–10,000 miles

---

Transmission Fluid (8HP70 8-Speed)

The 8HP70 ZF transmission in modern RAM 1500s is a sealed unit — no dipstick. Many dealers claim "lifetime fluid," but Mopar recommends a fluid check/service at 60,000 miles and a full change at 120,000. In towing/heavy use, service at 60,000.

Fluid spec: Mopar ATF+4 or ZF Lifeguard 8 equivalent Capacity: 8.0–9.5 quarts (depends on torque converter drain) Drain plug: M22 fill plug on the side of the pan (fill to overflow method) Pan bolt torque: 7 ft-lbs

DIY cost: $80–$120 in ATF+4 + new pan gasket Shop cost: $250–$400

Tip: The 8HP70 requires filling from the side fill hole to the overflow point — not by quart count. Use a fluid transfer pump and fill until it drips from the fill hole with the fluid at 86°F.

---

Front and Rear Differential Fluid

The RAM 1500 uses a 9.25" front axle (3.6L models) or 9.25" AAM front axle (Hemi/EcoDiesel) and a 9.25" rear axle on base models, with an 11.5" AAM rear on Heavy Duty trims.

Fluid spec: Mopar synthetic gear lube 75W-140 (with limited-slip additive if equipped with Trac-Lok) Drain plug torque: 35 ft-lbs Fill plug torque: 35 ft-lbs Rear differential capacity: 2.6 quarts (9.25"), 3.5 quarts (11.5") Front differential capacity: 1.5–1.8 quarts

Service interval: 30,000 miles under normal use; 15,000 miles if towing or off-road DIY cost: $40–$60 per differential Shop cost: $150–$250 per differential

For the full procedure, see our differential fluid change guide.

---

Transfer Case Fluid (4WD Models)

Case: NV244 / BorgWarner 44-45 (varies by year) Fluid spec: ATF+4 (Mopar — not gear oil) Capacity: 1.8–2.0 quarts Service interval: 30,000 miles, or after any water crossing Drain plug torque: 30 ft-lbs

DIY cost: $20–$30 Shop cost: $120–$180

Read the full walkthrough in our transfer case fluid guide.

---

Coolant / Antifreeze

The RAM 1500 uses OAT (Organic Acid Technology) coolant — specifically Mopar 5-Year 50/50 Antifreeze.

Do NOT mix: Old green antifreeze with OAT — causes gel contamination. Capacity: 13–16 quarts depending on engine (5.7L is approximately 15 quarts) Service interval: 5 years / 100,000 miles Drain plug (lower radiator): Remove the lower radiator hose or use the petcock valve

DIY coolant flush cost: $25–$40 in Mopar OAT + distilled water Shop cost: $130–$200

See the full procedure in our radiator coolant flush guide.

---

Brake Service

Front rotors (5.7L Hemi 4x4): 13.4" vented rotors Rear rotors: 13" vented Brake pad wear indicator: Electronic on most DT trims (warning light)

DIY brake pad replacement cost: $35–$70 per axle for pads + $60–$120 for rotors if needed Shop cost: $250–$450 per axle

Common issue: RAM rear drum brakes (on some base V6 trims) — rear drums rarely need service but are prone to seizing from lack of use on vehicles used primarily on pavement.

---

Spark Plugs (5.7L Hemi)

The Hemi uses 16 spark plugs (two per cylinder — a dual-plug head design). This sounds intimidating, but they're all accessible.

OEM plugs: Champion RE14MCC4 or equivalent Gap: 0.040" Torque: 13 ft-lbs (aluminum heads — use anti-seize on threads) Interval: 30,000–60,000 miles depending on plug type (copper vs. iridium)

DIY cost: $80–$120 for a full 16-plug set (copper); $160–$240 iridium Shop cost: $300–$500

---

Maintenance Schedule Summary

Service	Interval	DIY Cost	Shop Cost
Oil change (5.7L)	6,000–10,000 mi	$45–$70	$110–$160
Transmission service	60,000–120,000 mi	$80–$120	$250–$400
Diff fluid (front+rear)	30,000 mi	$80–$120	$300–$500
Transfer case fluid	30,000 mi	$20–$30	$120–$180
Coolant flush	100,000 mi / 5 yr	$25–$40	$130–$200
Spark plugs (16)	30,000–60,000 mi	$80–$240	$300–$500

---

Bottom Line

The RAM 1500 is built to last 200,000+ miles — but only if you actually maintain it. The 5.7L Hemi is nearly bulletproof on clean oil. The 8HP70 transmission is excellent when serviced; ignored, it's a $4,000 rebuild. Every service in this guide is DIY-able in your driveway with basic tools.

Access the DIY Mechanic System with torque specs, part numbers, and video walkthroughs at the full library at $29.99/mo.