The 1992 D250 is a workhorse platform split between the legendary 12-valve Cummins diesel and the Magnum 360 gas V8. Cummins trucks are highly sought after but come with weak automatic transmissions and injection pump issues, while gas models face typical LA-series V8 oiling problems and carburetor headaches.
47RH/A518 Automatic Transmission Failure (Cummins models)
Common · high severityTypical onset: 100,000-180,000 mi
Symptoms: Slipping in 3rd or 4th gear under load, Delayed engagement when cold, Burnt transmission fluid smell, Loss of overdrive function
Fix: The 47RH was never built to handle the Cummins torque. Clutch pack wear and overdrive unit failures dominate. Rebuild with upgraded clutches and bands runs 12-16 hours labor plus parts. Many opt for aftermarket valve bodies and billet input shafts during rebuild.
Estimated cost: $2,200-3,800
Bosch VE Injection Pump Wear (Cummins diesel)
Common · high severityTypical onset: 150,000-250,000 mi
Symptoms: Hard starting when warm, Loss of power above 2000 RPM, Black smoke under acceleration, Rough idle with fuel knock
Fix: The VE rotary pump wears internally — plungers and cam ring fail. Requires pump removal and rebuild or replacement. Book time is 6-8 hours; most shops send pumps out for rebuild (2-3 day turnaround). Timing must be reset on reinstallation.
Estimated cost: $1,800-2,800
Front Axle U-Joint and Ball Joint Failure
Common · medium severityTypical onset: 80,000-140,000 mi
Symptoms: Clunking when turning or accelerating, Vibration during 4WD engagement, Wandering steering or play in wheel, Grease leaking from CV boots on Dana 60 front
Fix: Dana 60 front end sees heavy loads. U-joints in the axle shafts wear first, followed by upper and lower ball joints. U-joints are 3-4 hours per side; ball joints add another 4-6 hours for the pair. Many do both at once to avoid double teardown.
Estimated cost: $800-1,400
Cylinder Head Cracking (5.9L V8 gas)
Occasional · high severityTypical onset: 120,000-200,000 mi
Symptoms: Coolant loss with no external leaks, White smoke from exhaust on startup, Overheating under load, Oil contamination in coolant reservoir
Fix: LA-series 360 heads crack between valve seats or exhaust ports, especially if overheated. Both heads typically need replacement or machining. Book time 14-18 hours including gasket set, head bolts, and machine work. Often discover intake manifold warpage during teardown.
Estimated cost: $2,500-4,200
Lift Pump Failure (Cummins diesel)
Common · medium severityTypical onset: 100,000-180,000 mi
Symptoms: Extended cranking before start, Loss of power on hills or under load, Air in fuel system requiring repeated bleeding, Engine dies when fuel tank below 1/4
Fix: Factory mechanical lift pump on the side of the engine fails — diaphragm tears or check valve sticks. Replacement is 1.5-2 hours labor. Many upgrade to electric in-tank or frame-mounted pumps during replacement for reliability.
Estimated cost: $250-600
Steering Box Wear and Pitman Arm Failure
Occasional · medium severityTypical onset: 100,000-160,000 mi
Symptoms: Excessive play in steering wheel (more than 2 inches), Wandering on highway requiring constant correction, Clunk felt through steering column over bumps, Leaking gear oil at steering box
Fix: Recirculating ball steering boxes wear internally; sector shaft bushings and worm gear see the most damage. Rebuild kits available but most replace the box (3-4 hours). Pitman arm splines strip from play. Always check drag link and tie rod ends during replacement.
Estimated cost: $450-900
Exhaust Manifold Cracking (5.9L V8 gas)
Occasional · low severityTypical onset: 80,000-150,000 mi
Symptoms: Loud ticking from engine bay when cold, Exhaust smell in cab at idle, Visible cracks near center ports on manifolds, Failed emissions test due to pre-cat leaks
Fix: Cast iron manifolds crack from thermal cycling. Driver side more common due to tighter clearances. Replacement is 4-6 hours per side due to seized studs in heads. Budget extra for broken stud extraction and retapping.
Estimated cost: $600-1,200
Buy a Cummins-equipped D250 if you find one with transmission and injection pump already addressed — they're nearly bulletproof otherwise; avoid high-mileage gas V8 models unless priced for an engine rebuild.
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.