The 2020 Chrysler Voyager is essentially a stripped-down Pacifica minivan with the proven 3.6L Pentastar V6 and 9-speed automatic. While the platform is solid for a minivan, transmission cooler failures and oil consumption issues plague higher-mileage examples, and the 9-speed has known shift quality problems that can escalate if ignored.
Transmission Oil Cooler Failure
Common · high severityTypical onset: 60,000-100,000 mi
Symptoms: Transmission fluid leaking from radiator area, Pink milkshake appearance in coolant reservoir (fluid cross-contamination), Transmission slipping or delayed shifts, Engine overheating in severe cases
Fix: Replace transmission oil cooler assembly, flush both cooling system and transmission completely. This is a 4-5 hour job including fluid exchanges. If contamination occurred, internal transmission damage may follow within months, requiring full rebuild.
Estimated cost: $800-1,400
Pentastar 3.6L Oil Consumption / Piston Ring Failure
Occasional · high severityTypical onset: 80,000-120,000 mi
Symptoms: Burning more than 1 quart per 1,000 miles, Blue smoke on cold start or acceleration, Misfires and rough idle from fouled spark plugs, Check engine light with P0300-series misfire codes
Fix: Early-generation Pentastar engines (pre-2016 design carried into some 2020 builds) suffer piston ring land cracking. Requires engine teardown, new pistons, rings, often head gasket replacement. Machine work if cylinder scoring present. 18-25 labor hours for proper rebuild or short block swap.
Estimated cost: $4,500-7,500
9-Speed Transmission Shift Quality Issues
Common · medium severityTypical onset: 40,000-80,000 mi
Symptoms: Harsh 2-3 or 3-4 upshifts, Hesitation or clunking when downshifting, Transmission hunting between gears at cruising speed, Shudder during light acceleration
Fix: Often starts with software updates (TSB 21-004-19) and transmission fluid flush using Mopar ZF 8&9 Speed ATF. If mechanical, torque converter or valve body replacement required. Fluid service is 2 hours; valve body adds 8-10 hours.
Estimated cost: $300-2,800
Transmission Mount Failure
Occasional · low severityTypical onset: 70,000-110,000 mi
Symptoms: Clunking noise when shifting from Park to Drive, Excessive vibration at idle, Visible engine movement when revving in Park, Transmission tunnel vibration during acceleration
Fix: Upper transmission mount (dogbone mount) deteriorates from heat and stress. Replacement requires supporting powertrain, removing mount bolts. 1.5-2.5 hours labor depending on access.
Estimated cost: $250-450
Fuel Filter Clogging (Ethanol-Related)
Occasional · medium severitySymptoms: Hard starting after sitting overnight, Sputtering or loss of power under load, Intermittent stalling, Fuel pump whining noise
Fix: In-tank fuel pump module includes integrated filter that clogs prematurely with higher ethanol blends or contaminated fuel. Requires dropping fuel tank, replacing entire pump assembly. 3-4 hours labor.
Estimated cost: $600-950
Side Curtain Airbag Deployment Issue (Recall)
Rare · high severitySymptoms: Airbag warning light illuminated, No symptoms until crash event where side airbags fail to deploy
Fix: NHTSA recall for side curtain airbag wiring harness chafing. Dealer inspection and harness replacement if affected. Covered under recall at no cost. Check VIN at NHTSA.gov.
Estimated cost: $0
Buy only with full service records showing transmission cooler proactively replaced and zero oil consumption history; otherwise budget $3K-5K for deferred powertrain issues within 20K miles of purchase.
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.