1990 DODGE RAM VAN

Typical onset: 100,000-150,000 mi

Symptoms: Transmission fluid in radiator or coolant in transmission pan, Milky or strawberry-colored transmission fluid, Delayed or slipping shifts after mixing fluids, Overheating transmission

Fix: Replace transmission cooler lines and external cooler, flush entire cooling system and transmission. If fluids mixed significantly, transmission rebuild is often necessary. 3-4 hours for preventive cooler replacement, 12-18 hours if transmission rebuild required.

Estimated cost: $400-800 for cooler/lines only, $1,800-3,200 with transmission rebuild

Typical onset: 150,000-200,000+ mi

Symptoms: Heavy knocking or rod knock from bottom end, Excessive oil consumption (quart per 500-1000 miles), Blue smoke on acceleration or deceleration, Low oil pressure at idle, Metal shavings in oil or filter

Fix: Common on neglected or overheated engines. Requires complete engine rebuild with new pistons, rings, bearings, and machine work, or short block replacement. The 5.2L and 5.9L V8s are more prone due to heavier service use. 20-30 hours for in-frame rebuild, 16-24 hours for engine R&R with short block.

Estimated cost: $3,500-6,500 depending on block condition and parts availability

Typical onset: 120,000-180,000 mi

Symptoms: White smoke from exhaust (coolant burning), Overheating without obvious external leaks, Coolant loss with no visible puddles, Oil contamination in coolant or vice versa, Rough idle or misfire on specific cylinders

Fix: V8 engines often blow both gaskets due to overheating or age. Requires head removal, resurfacing, and complete gasket set. 12-16 hours labor for both heads on V8, includes valve adjustment and timing chain inspection.

Estimated cost: $1,800-3,000 including machine shop work

Symptoms: Hard starting or extended cranking, Loss of power under load or at highway speeds, Stalling after 15-20 minutes of driving, Surging or hesitation during acceleration

Fix: Original steel fuel tanks rust internally after 30+ years, sending debris through system. Requires fuel filter replacement (often neglected), tank cleaning or replacement, and fuel line inspection. Filter replacement is 0.5-1 hour, tank replacement adds 3-4 hours.

Estimated cost: $80-150 for filter service, $600-1,200 with tank replacement

Typical onset: 80,000-120,000 mi

Symptoms: Clunking when shifting from park to drive or reverse, Excessive vibration at idle in gear, Visible sagging of transmission tail housing, Harsh engagement into gear

Fix: Rubber mount deteriorates from age and fluid contamination. Simple replacement requiring transmission support during swap. 1-1.5 hours labor.

Estimated cost: $150-250

Typical onset: 150,000+ mi

Symptoms: Grinding noise when engaging clutch (manual) or excessive end play, Clutch pedal pulsation or difficulty shifting, Metallic scraping heard during cold starts, Visible crankshaft movement front-to-back

Fix: Requires engine removal and complete disassembly to replace thrust bearings and inspect crankshaft for damage. Often found during rebuild diagnostics. 18-24 hours for full R&R and bearing replacement.

Estimated cost: $2,800-4,500