The 2013 Ram 3500 with the 6.7L Cummins is a capable workhorse, but the 68RFE automatic transmission is its Achilles heel—expect multiple solenoid failures, cooler line leaks, and potentially a full rebuild if neglected or towed heavy regularly.
68RFE Transmission Solenoid Failures (Overdrive, TCC, Shift Solenoids)
Common · medium severityTypical onset: 80,000-150,000 mi
Symptoms: harsh or delayed shifting between gears, check engine light with P0871 or P0868 codes, limp mode or stuck in third gear, slipping during acceleration under load
Fix: Dropping the pan to replace individual solenoids takes 3-4 hours; many techs replace the entire solenoid pack while in there to prevent comebacks. Transmission filter and fluid service is mandatory during this job.
Estimated cost: $800-1,800
Transmission Oil Cooler and Cooler Line Leaks
Common · high severityTypical onset: 100,000-180,000 mi
Symptoms: transmission fluid pooling under the front of the truck, low fluid warnings or burnt smell, overheating transmission especially when towing, corroded or weeping hard lines at frame rail
Fix: Cooler lines rust out at mounting clips; replacing both lines takes 2-3 hours. If the external cooler itself is leaking or clogged, figure 3-4 hours total for cooler and lines. Flush system after replacement to clear debris.
Estimated cost: $600-1,400
Torque Converter Shudder and Lockup Clutch Failure
Occasional · high severityTypical onset: 120,000-200,000 mi
Symptoms: vibration or shudder at 40-50 mph during light acceleration, slipping feel when cruise is engaged uphill, metallic debris in transmission pan during fluid changes, overheating transmission with burnt fluid smell
Fix: Torque converter replacement requires full transmission removal—8-10 hours of labor. Often discovered during a rebuild when metal shavings are found. High-performance aftermarket units are common upgrades for trucks that tow regularly.
Estimated cost: $2,200-3,800
Complete 68RFE Transmission Rebuild
Occasional · high severityTypical onset: 150,000-250,000 mi
Symptoms: multiple solenoid failures within short intervals, slipping in multiple gears or won't move, metal shavings in fluid or pan, burnt transmission fluid that's dark brown or black, history of heavy towing or neglected fluid changes
Fix: Full rebuild involves removing transmission, replacing clutch packs, bands, bearings, seals, and torque converter—typically 12-16 hours. Many owners opt for upgraded aftermarket clutch packs and billet torque converters at this point.
Estimated cost: $3,500-6,000
Transmission Mount Failure
Common · low severityTypical onset: 80,000-140,000 mi
Symptoms: clunk or thud when shifting from park to drive, excessive vibration at idle in gear, visible tearing or separation of rubber mount, transmission sitting lower than normal when inspected on lift
Fix: Rear transmission crossmember mount wears out from engine torque and weight. Replacement takes 1-1.5 hours with a transmission jack to support the tail. Polyurethane aftermarket mounts last longer but transmit more NVH.
Estimated cost: $250-500
Transmission Shift Cable Binding or Detachment
Occasional · medium severityTypical onset: 90,000-160,000 mi
Symptoms: shifter feels loose or disconnected, can't shift out of park even with brake applied, gear indicator doesn't match actual gear, cable frayed or broken at transmission linkage
Fix: Cable routing under the truck exposes it to road salt and debris. Replacement involves new cable and bushing at both ends—2-3 hours. Adjustment is critical to ensure proper park pawl engagement.
Estimated cost: $400-750
Fuel Filter Clogging (Diesel Particulate Contamination)
Common · medium severitySymptoms: loss of power under load or uphill, hard starting after sitting overnight, rough idle or surging, fuel filter housing shows water or black sludge during changes
Fix: The 6.7L Cummins has a combined fuel/water separator filter that needs changing every 15,000-20,000 miles in real-world conditions—more often with questionable fuel quality. Takes 0.5 hours; always prime the system properly to avoid air locks.
Estimated cost: $150-300
Buy it for the bulletproof Cummins engine, but budget $2,000-4,000 for inevitable 68RFE transmission work—transmission health and service history should be your primary inspection focus.
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.