2016 RAM 2500

Typical onset: 40,000-100,000 mi

Symptoms: Sudden catastrophic knock, often at highway speed under load, Metal shavings in oil, dropping oil pressure, White or blue smoke on cold start progressing to constant, Coolant in oil or oil in coolant if piston cracks through to water jacket

Fix: Complete engine rebuild or replacement. Defective piston castings (poor quality control 2013-2018) crack at the wrist pin boss or bowl rim, then take out bearings. If caught early with oil analysis, you might get away with pistons and bearings (35-45 hours labor). Most need short block or full rebuild (50-70 hours). Some owners go straight to reman long block.

Estimated cost: $8,000-18,000

Typical onset: 60,000-120,000 mi

Symptoms: Transmission fluid puddle under truck, usually passenger side near radiator, Sudden loss of all gears, neutral only, Burnt transmission fluid smell, Low fluid warning if equipped, or just slipping/no movement

Fix: The factory crimped steel lines corrode at the cooler and radiator connections, then blow out under pressure. You'll lose 12+ quarts in minutes. Replace with updated lines or aftermarket braided setup (3-4 hours), then flush cooler, drop pan, and refill. If you drove it empty, expect transmission rebuild (18-25 hours).

Estimated cost: $400-800 (lines only), $3,500-5,500 (if transmission damaged)

Typical onset: 70,000-130,000 mi

Symptoms: Clunk when shifting from Park to Drive or Reverse to Drive, Vibration at 1,500-2,000 RPM, especially under load, Driveline shudder on acceleration, Visible separation or tearing of rubber isolator

Fix: The rear transmission mount tears from torque cycling, letting the tailhousing drop and misalign the driveline. Replacement is straightforward—support transmission, unbolt crossmember, swap mount (1.5-2 hours). Inspect driveshaft and u-joints while you're under there.

Estimated cost: $250-450

Symptoms: Airbag warning light, In a collision, metal fragments propelled into cabin instead of proper deployment, No symptoms until deployment event

Fix: This is a Takata-style defect. If your VIN shows open recall (check NHTSA), get it done—free at dealer. They replace the side curtain inflators (2-3 hours dealer time). Do NOT ignore this; people have died from inflator shrapnel.

Estimated cost: $0 (recall)

Typical onset: 80,000-150,000 mi

Symptoms: Steering wander, constant correction needed on highway, Clunk over bumps felt through steering wheel, Play in wheel when wiggling at 12 and 6 o'clock with wheels on ground, Uneven or accelerated tire wear on front axle

Fix: Heavy-duty trucks eat tie rods and drag link ends, especially if oversized tires or plow duty. Inspect annually—if there's vertical play at the ball joint, replace. Drag link end is 1 hour, tie rod ends are 1.5-2 hours, alignment required after (1 hour). Do both sides at once to save alignment cost.

Estimated cost: $400-700

Typical onset: 50,000-100,000 mi

Symptoms: Diesel fuel odor in cab or outside truck, Visible fuel weeping at filter canister base, Hard start or extended crank after sitting overnight, Loss of prime, sucking air

Fix: The filter head o-rings and housing gasket deteriorate, especially in cold climates. Replace filter assembly with updated Mopar part or aftermarket (like AirDog adapter) during regular fuel filter service. Takes 0.5-1 hour if you're just doing seals, 1.5 hours if upgrading to billet housing.

Estimated cost: $150-400

Typical onset: 60,000-120,000 mi

Symptoms: Check engine light, code P2262 (turbo boost control), Loss of exhaust brake function, Slight drop in turbo boost under load, Hissing or air leak sound from turbo area

Fix: The solenoid that actuates the variable geometry turbo for exhaust braking sticks or fails. It's on the passenger side of the turbo. Replace solenoid and clean the VGT actuator (1.5-2 hours). If the actuator itself is seized, add another hour and $200 in parts.

Estimated cost: $300-600