2018 JEEP GRAND CHEROKEE SRT

Typical onset: 60,000-90,000 mi

Symptoms: Transmission slipping or harsh shifting, Milky or pink transmission fluid (coolant cross-contamination), Check engine light with transmission codes, Overheating transmission temps on display

Fix: Replace transmission oil cooler and flush entire system. If contamination occurred, transmission often needs complete rebuild or replacement due to internal damage. 8-12 hours labor for cooler only, 18-25 hours if transmission needs rebuild.

Estimated cost: $1,200-2,800 for cooler/flush, $4,500-7,500 if transmission damaged

Typical onset: 80,000-120,000 mi

Symptoms: Sudden loss of power and violent knocking noise, Metal shavings in oil during changes, Misfires on one or more cylinders that don't resolve with plug/coil changes, Cylinder compression loss on leak-down test

Fix: The 6.4L Hemi can drop valve seats, which destroys pistons, rods, and cylinder walls. Requires complete engine rebuild with machine work or short block replacement. 25-35 hours labor for short block swap, more for full rebuild with head work.

Estimated cost: $8,000-15,000

Typical onset: 50,000-80,000 mi

Symptoms: Clunking when shifting from Park to Drive or Reverse, Vibration at idle that changes when shifting to Neutral, Excessive movement visible when engine is revved in Park

Fix: Replace transmission mount(s). The SRT's power output and weight tears through mounts faster than regular Grand Cherokees. 1.5-2.5 hours labor depending on access.

Estimated cost: $350-650

Typical onset: 70,000-100,000 mi

Symptoms: Hesitation or stumble during hard acceleration, Engine cutting out under high load (like highway passing), Difficulty starting when fuel tank is below 1/4, P0087 code (fuel rail pressure too low)

Fix: The high-pressure fuel system on the SRT can suffer from clogged filters or failing pumps, especially if lower-quality fuel was used. Filter replacement is 1-2 hours, pump replacement requires dropping tank for 3-4 hours.

Estimated cost: $400-800 for filter, $1,200-1,800 for pump

Typical onset: 90,000-130,000 mi

Symptoms: White smoke from exhaust, Coolant loss with no visible leaks, Oil that looks milky or has coolant mixed in, Overheating that doesn't resolve after thermostat/water pump replacement

Fix: Head gasket replacement requires removing both heads, machining if warped, and replacing all related gaskets. Common on engines that were overheated or tracked. 16-22 hours labor for both sides.

Estimated cost: $3,500-6,000

Typical onset: 100,000+ mi

Symptoms: Deep knocking noise from bottom of engine that increases with RPM, Low oil pressure warning at idle, Metallic debris on oil pan magnet or in filter media, Rod knock that's louder when cold

Fix: Bearing failure requires complete disassembly and crankshaft inspection. Often caused by extended oil change intervals, low oil level, or high-performance driving without adequate cooling. If caught early, bearings can be replaced; severe cases need full rebuild. 20-30+ hours labor.

Estimated cost: $4,500-8,000 for bearings only, up to $12,000+ for full rebuild with crank work