The 1989 Dodge Ram 50 is a rebadged Mitsubishi Mighty Max with the 2.4L 4G64 engine and typically an automatic transmission. Solid engine, but the transmission and related components are the Achilles' heel of this platform.
Automatic Transmission Failure (A/W4 or KM148)
Common · high severityTypical onset: 120,000-180,000 mi
Symptoms: Delayed engagement into drive or reverse, Slipping between 2nd and 3rd gear under load, No upshift past 2nd gear or stuck in limp mode, Whining or grinding noise from bellhousing area
Fix: Full rebuild or replacement required in most cases. These Mitsubishi automatics don't tolerate neglected fluid changes. Expect 8-12 hours labor for R&R plus rebuild time. Torque converter often needs replacement simultaneously.
Estimated cost: $1,800-3,200
Transmission Mount Collapse
Common · medium severityTypical onset: 80,000-140,000 mi
Symptoms: Excessive clunking when shifting from park to drive, Vibration at idle that changes when shifting into gear, Visible sag of transmission tailhousing
Fix: The rubber mount deteriorates and allows the transmission to drop, stressing linkage and cooler lines. Replace both transmission and engine mounts at same time. 1.5-2 hours labor.
Estimated cost: $180-320
Shift Linkage Wear and Misadjustment
Common · medium severityTypical onset: 100,000+ mi
Symptoms: Shifter feels loose or sloppy, Difficulty selecting park or reverse reliably, Shifter indicator not matching actual gear, Engine starts in gear despite being in park
Fix: Bushings wear out in the column linkage and at the transmission lever. Adjustment procedure is finicky and often needs multiple attempts. Parts are cheap but labor is 1.5-2.5 hours due to access.
Estimated cost: $150-280
Transmission Oil Cooler Line Leaks
Occasional · high severityTypical onset: 90,000-150,000 mi
Symptoms: ATF puddles under front of vehicle, Transmission fluid level drops rapidly, Lines rusted or split at crimped fittings, Sudden loss of all gears after leak develops
Fix: Steel lines rust through where they pass the frame rail, especially in salt states. Leaking cooler lines can drain the trans in under 10 miles. Replace both lines and inspect cooler for blockage. 2-3 hours labor.
Estimated cost: $250-450
Knock Sensor Failure with Check Engine Light
Occasional · low severityTypical onset: any mileage
Symptoms: Check engine light illuminated (Code 52 or similar), Slight ping under acceleration, Reduced fuel economy by 2-3 mpg, Engine runs but with retarded timing
Fix: Sensor is buried under the intake manifold. Goes bad from heat cycles. Engine runs fine but ECU retards timing as failsafe. Must pull intake plenum for access. 3-4 hours labor.
Estimated cost: $280-480
Clutch Throw-Out Bearing Failure (Manual Trans)
Occasional · medium severityTypical onset: 90,000-140,000 mi
Symptoms: Grinding or rattling noise when clutch pedal is depressed, Noise disappears when pedal is released, Difficulty shifting into first or reverse, Progressively worsens over weeks
Fix: Bearing seizes or comes apart, requires transmission removal. Always replace clutch disc, pressure plate, pilot bearing, and throw-out bearing as a set. 5-6 hours labor.
Estimated cost: $650-950
Buy one if the transmission has been recently rebuilt or replaced with records; otherwise, budget $2,000-3,000 for eventual transmission work and walk away if the owner has no service history.
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.