The 2004 Grand Caravan with the 3.3L/3.8L V6 is a workhorse minivan plagued by catastrophic transmission failures and engine bottom-end problems. When they run, they're practical family haulers, but major powertrain repairs often total the vehicle.
41TE Transmission Failure (Complete Rebuild or Replacement)
Common · high severityTypical onset: 80,000-140,000 mi
Symptoms: harsh or delayed 2-3 upshift, slipping between gears under load, shuddering during acceleration, no movement in drive or reverse, burnt transmission fluid smell
Fix: The 41TE four-speed automatic is notorious for valve body issues, clutch pack failure, and input/output shaft problems. Transmission cooler line leaks contaminate the fluid and accelerate failure. Requires complete transmission rebuild (12-16 hours) or replacement with remanufactured unit (10-14 hours). Always replace transmission oil cooler and flush lines during rebuild.
Estimated cost: $2,200-3,800
Lower Engine Failure (Spun Bearings, Piston Slap, Crankshaft Damage)
Occasional · high severityTypical onset: 120,000-180,000 mi
Symptoms: heavy knocking noise from bottom of engine, especially when cold, metallic rattle that worsens with RPM, low oil pressure warning, sudden loss of power, metal shavings in oil
Fix: The 3.3L/3.8L engines develop rod bearing wear and piston slap, often from sludge buildup or inadequate oil changes. Can progress to spun bearings or cracked pistons. Requires complete engine rebuild with crankshaft machining (22-28 hours) or short block replacement (18-24 hours). Often more cost-effective to install a used/remanufactured engine (14-18 hours).
Estimated cost: $3,500-5,500
Intake Manifold Plenum Gasket Failure
Common · medium severityTypical onset: 70,000-110,000 mi
Symptoms: rough idle or stalling, coolant loss with no visible leaks, white smoke from exhaust on startup, check engine light with lean/misfire codes, sweet smell from vents
Fix: The lower intake plenum gasket deteriorates and allows coolant into the cylinders or oil passages. Can cause hydrolock if ignored. Requires intake manifold removal, plenum gasket replacement, and often valve cover gaskets while you're in there (5-7 hours). Replace all vacuum lines and PCV components during repair.
Estimated cost: $650-1,100
Power Steering Hose Failure and Pump Leaks
Common · medium severityTypical onset: 90,000-150,000 mi
Symptoms: power steering fluid puddles under vehicle, whining or groaning when turning, intermittent loss of power assist, fluid spraying onto exhaust manifold causing smoke, low fluid warning or stiff steering
Fix: High-pressure steering hoses crack and leak at crimped connections, often near the exhaust where heat accelerates failure (recall 04V-343 addressed some models but problem persists). Pump seals also fail. Hose replacement requires 2-3 hours; pump replacement adds another 2-3 hours if needed. Flush system completely to remove contamination.
Estimated cost: $400-900
Transmission Mount Collapse
Common · low severityTypical onset: 60,000-100,000 mi
Symptoms: heavy clunk when shifting into drive or reverse, excessive engine movement during acceleration, vibration at idle in gear, visible sag on passenger side of engine bay
Fix: The front transmission mount (also called dogbone mount) fails from the weight of the transaxle and torque loads. Rubber tears or separates from metal brackets. Replacement requires 1.5-2 hours and supporting the engine/transmission. Replace both engine and transmission mounts together for best results.
Estimated cost: $250-450
Head Gasket Failure (Both Banks)
Occasional · high severityTypical onset: 100,000-160,000 mi
Symptoms: chronic overheating, coolant mixing with oil (milky residue on dipstick), white exhaust smoke, bubbles in coolant reservoir, external coolant leaks at head/block junction
Fix: Head gaskets fail from overheating episodes or age-related degradation. Often both banks require replacement due to thermal stress. Requires cylinder head removal, resurfacing, and complete gasket set replacement (14-18 hours). Check for warped heads; machining adds cost. Replace thermostat, water pump, and timing components while apart.
Estimated cost: $2,800-4,200
Rear Window Latch/Regulator Failure
Occasional · low severitySymptoms: rear window won't latch closed, window drops or pops open while driving, warning chime and dash light on, electrical operation failure
Fix: The rear liftgate window latch mechanism and electric window regulator fail from repeated use and age. Plastic components break. Latch replacement requires 1-2 hours; regulator replacement adds another 1-1.5 hours. Safety recall 04V-470 addressed some latch issues but many units still fail.
Estimated cost: $300-650
Only buy if under 80,000 miles with documented transmission services and you can handle $3,000+ repair bills—otherwise walk away, the major failures are when, not if.
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.