The 2018 Grand Caravan with the 3.6L Pentastar V6 is a solid platform marred by two major weaknesses: the 62TE transmission runs hot and fails prematurely, and the 3.6L engine suffers catastrophic rocker arm/lifter failures that destroy the valvetrain and often require full engine replacement.
62TE Transmission Failure (Overheating and Internal Clutch Pack Damage)
Common · high severityTypical onset: 80,000-130,000 mi
Symptoms: harsh or delayed 2-3 upshifts, transmission slipping in 4th or 6th gear, limp mode with P0750 or P0871 codes, burnt ATF smell, complete loss of forward gears
Fix: Transmission rebuild or replacement required. External cooler typically fails first, causing internal damage. Full rebuild: 8-12 hours labor. Reman unit swap: 6-8 hours.
Estimated cost: $3,200-5,500
3.6L Pentastar Rocker Arm/Lifter Failure Leading to Valvetrain Destruction
Occasional · high severityTypical onset: 60,000-110,000 mi
Symptoms: sudden loud ticking or rattling from cylinder heads at startup, P0300 random misfire or cylinder-specific misfire codes, metal shavings in oil, catastrophic loss of power, check engine light with cam/crank correlation codes
Fix: Rocker arms seize or needle bearings fail, damaging camshaft lobes, valves, and pistons. Often requires both cylinder heads, camshafts, and sometimes short block if debris circulates. Conservative repair: both heads R&R with cam replacement, 16-20 hours. Worst case: short block or long block replacement, 24-30 hours.
Estimated cost: $4,500-9,000
Totally Integrated Power Module (TIPM) Electrical Gremlins
Occasional · medium severitySymptoms: fuel pump not priming (no start), wipers activating randomly, horn honking on its own, power locks cycling, ABS or airbag warning lights with no stored codes
Fix: TIPM internal relays fail due to corrosion or heat. Chrysler updated part numbers multiple times. Replacement: 1.5-2 hours labor. Programming sometimes required.
Estimated cost: $600-1,200
Transmission Oil Cooler Line Corrosion and Leaks
Common · medium severityTypical onset: 70,000-120,000 mi
Symptoms: ATF puddles under vehicle near radiator, low transmission fluid warning, transmission temperature warning, pink fluid mixing with coolant (internal radiator leak)
Fix: Steel cooler lines rust through at crimps or where they pass frame rails (salt belt especially). External lines: 2-3 hours. If cooler in radiator fails, flush cooling system and replace radiator, add 4-5 hours total.
Estimated cost: $400-1,100
Front Lower Control Arm Bushing Failure
Common · low severityTypical onset: 80,000-130,000 mi
Symptoms: clunking over bumps, steering wander, excessive tire wear on inside edge, alignment won't hold
Fix: Rubber bushings separate or tear. Replace control arms as assemblies (bushings not sold separately from Mopar). Both sides: 2.5-3 hours.
Estimated cost: $450-750
Evaporative Emissions System Leak (ESIM Module and Purge Valve)
Occasional · low severityTypical onset: 60,000-100,000 mi
Symptoms: P0456 small EVAP leak code, P0457 loose fuel cap code (when cap is tight), fuel smell near tank, check engine light
Fix: ESIM (Evaporative System Integrity Monitor) pump module on fuel tank fails, or purge valve sticks. ESIM replacement requires dropping tank: 3-4 hours. Purge valve only: 0.5 hours.
Estimated cost: $300-900
Buy only if under 70,000 miles with documented transmission services and extended warranty coverage — the trans and engine failure risks make this a dice roll beyond that point.
AI-assisted summary drawn from NHTSA recall data, our labor-times database, and platform knowledge. Not a substitute for a pre-purchase inspection on a specific vehicle.