The 1996 Eagle Summit is a rebadged Mitsubishi Mirage/Lancer built during Chrysler's Diamond-Star partnership. While generally economical, these suffer from typical '90s Mitsubishi weak spots: automatic transmission failures, head gasket issues on higher-mileage examples, and oil control problems that accelerate engine wear.
Automatic Transmission Failure (F4A21/F4A22)
Common · high severityTypical onset: 90,000-140,000 mi
Symptoms: Slipping between gears, especially 2nd to 3rd, Delayed engagement when shifting from Park to Drive, Transmission overheating, burnt fluid smell, Check engine light with P0700-series codes
Fix: These 4-speed automatics grenade their clutch packs and valve bodies. Rebuilds require 8-12 hours but many shops won't touch them due to parts scarcity—you're often looking at a used replacement. Oil cooler lines rust through and contaminate fluid, accelerating failure. Always replace cooler and lines during any trans work.
Estimated cost: $1,800-3,200
Head Gasket Failure (1.8L and 2.4L engines)
Occasional · high severityTypical onset: 120,000-180,000 mi
Symptoms: White smoke from exhaust, especially on cold starts, Coolant loss with no visible leaks, Overheating under load or in traffic, Oil cap shows milky residue, coolant in oil
Fix: The 4G64 and 4G93 engines develop external leaks first, then internal. Head must be resurfaced (often warped .008"+ by the time you catch it). Budget 10-14 hours for proper job including timing belt, water pump, and new head bolts. The 1.5L is less prone but not immune.
Estimated cost: $1,200-2,000
Harmonic Balancer Separation
Occasional · medium severityTypical onset: 100,000-150,000 mi
Symptoms: Severe vibration at idle that worsens with RPM, Visible wobble on crankshaft pulley, Serpentine belt walking off or shredding, Squealing or grinding from front of engine
Fix: The rubber isolator delaminates between the hub and outer ring. If the outer ring flies off, it takes out the crank sensor, timing cover, and radiator. Replacement is 2-3 hours but requires special puller—many shade-tree guys hammer them on and crack the new one. Do NOT ignore the wobble.
Estimated cost: $300-550
Excessive Oil Consumption (1.5L 4G15)
Common · medium severityTypical onset: 80,000-120,000 mi
Symptoms: Burning 1 quart every 800-1,200 miles, Blue smoke on deceleration or at startup, Fouled spark plugs (oil-soaked), Failing emissions tests for HC
Fix: Valve stem seals harden and piston rings lose tension. Many owners just top off oil every tank of gas. Proper fix requires head removal for seals (6-8 hours) or full ring job if compression is down (15-20 hours). Ring job often not economical on a $1,500 car.
Estimated cost: $800-1,400 (seals only), $2,000-3,500 (rings/rebuild)
Distributor O-Ring Oil Leak (1.5L/1.8L)
Common · low severityTypical onset: 70,000+ mi
Symptoms: Oil pooling on top of transmission bell housing, Oil dripping from distributor base, Occasional misfire if oil gets into cap, Oil smell in cabin with heat on
Fix: The distributor mounts at the back of the head with a single O-ring that hardens. Leaks down onto the firewall and creates a mess. Fix is 1-2 hours: pull distributor, replace O-ring, remark timing. Cheap part but annoying access on the firewall side.
Estimated cost: $150-300
Clutch Hydraulics Failure (Manual Trans)
Occasional · medium severityTypical onset: 90,000-130,000 mi
Symptoms: Clutch pedal sinks to floor and stays there, Difficulty shifting, grinding into gear, Soft or spongy pedal feel, Fluid leak at master or slave cylinder
Fix: Master and slave cylinders fail within 20k of each other—replace both together or you'll be back in 6 months. Slave is external (thank god), 2-3 hours for the pair including bleeding. Aftermarket parts quality is sketchy; OEM if you can find it.
Estimated cost: $400-650
Buy only if you find a one-owner manual transmission example under 100k miles for $1,500 or less—automatics are ticking time bombs and high-mileage ones nickel-and-dime you to death.
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.