The 1993 Grand Voyager pioneered the modern minivan but suffers from catastrophic transmission failures and premature engine death, primarily due to cooling system neglect and inadequate transmission cooling design. Budget heavily for powertrain work if buying used.
Transmission Failure (A604 4-Speed Automatic)
Common · high severityTypical onset: 80,000-140,000 mi
Symptoms: Delayed or harsh 2-3 upshift, then loss of all forward gears, Slipping under load, especially when hot, Burnt ATF smell, dark red or brown fluid, Check engine light with transmission codes
Fix: The A604 Ultradrive is legendary for solenoid pack and clutch failures. Transmission cooler inadequate for towing or hot climates. Rebuild requires 12-16 hours; expect new solenoid pack, clutches, and bands. Many shops won't touch these—find a transmission specialist. Add auxiliary cooler during repair.
Estimated cost: $1,800-3,200
Engine Overheating Leading to Head Gasket Failure
Common · high severityTypical onset: 100,000-150,000 mi
Symptoms: Coolant loss with no visible leaks, White smoke from exhaust, sweet smell, Milky oil on dipstick or oil cap, Overheating in traffic or under load, Misfires on startup when cold
Fix: 3.3L and 3.8L V6s warp heads when overheated due to clogged radiators or failed water pumps. Both head gaskets run 18-22 hours labor. Heads must be checked for flatness and frequently require machining ($150-250 each). Always replace timing belt/water pump/thermostat during repair. If neglected, leads to cracked block requiring short block replacement (25-30 hours).
Estimated cost: $2,200-3,800
Transmission Oil Cooler Line Leaks
Common · medium severityTypical onset: 70,000-120,000 mi
Symptoms: ATF puddles under radiator area, Low transmission fluid on dipstick, Transmission slipping or delayed engagement after leak develops, Rust stains on cooler lines at crimp connections
Fix: Steel cooler lines rust through where they crimp to rubber hoses, or hoses burst. If ATF contaminates coolant (internal radiator leak), requires radiator replacement AND transmission flush. External line repair: 1.5-2.5 hours. Internal contamination scenario adds 3-4 hours and often kills transmission within weeks if not caught immediately.
Estimated cost: $180-450
Intake Manifold Plenum Gasket Leak
Occasional · medium severityTypical onset: 90,000-140,000 mi
Symptoms: Rough idle, hunting idle speed, Whistling or hissing sound from engine bay, Poor fuel economy, hesitation on acceleration, P0300-series misfire codes
Fix: Upper plenum gasket deteriorates, creating vacuum leak. Requires removing upper intake plenum (3-4 hours). While in there, replace lower intake gaskets too—they're next. Use Mopar or FelPro gaskets, not cheapo sets. This job reveals whether valve cover gaskets are next (usually are).
Estimated cost: $450-750
Front Engine Mount and Transmission Mount Collapse
Common · low severityTypical onset: 80,000-130,000 mi
Symptoms: Heavy clunk when shifting from Park to Drive, Vibration at idle in Drive with brake applied, Engine rocks excessively during acceleration, Transmission shifter shakes
Fix: Hydraulic engine mounts fail, letting 3.3L/3.8L torque rock the drivetrain violently. Transmission mount (left side) goes first, then right engine mount. Replace both at once: 2.5-3.5 hours. Aftermarket mounts acceptable but OE lasts longer. Clunking worsens CV joint and strut wear if ignored.
Estimated cost: $350-600
Power Sliding Door Latch and Cable Failures
Occasional · low severitySymptoms: Door won't latch, stays ajar while driving, Cable pops off or frays at latch mechanism, Manual operation works but power function dead, Grinding or clicking from latch actuator
Fix: If equipped with power sliding door (passenger side), plastic latch components and cables wear. Requires door panel removal and latch R&R: 2-3 hours. NLA from Chrysler; aftermarket latches marginal quality. Many owners convert to manual-only operation. Recall addressed hinge attachments but not latch internals.
Estimated cost: $280-550
Evaporative Emissions Purge Solenoid and Leak Detection Pump Failure
Occasional · low severityTypical onset: 100,000+ mi
Symptoms: Check engine light with P0441, P0455, P0456 codes, Fuel smell after filling tank, Difficulty filling tank, pump clicks off repeatedly, Failed emissions test
Fix: Purge solenoid sticks or leak detection pump diaphragm ruptures. Solenoid replacement: 0.5-1 hour. LDP harder to access (behind fender liner): 1.5-2 hours. Often misdiagnosed as gas cap. Check for cracked EVAP lines first—common on 25+ year old plastic. Smoke test recommended.
Estimated cost: $150-400
Only buy if under $2,000 with proof of recent transmission rebuild and timing belt service—otherwise you're buying someone else's $4,000 repair bill.
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.