The 2008 Grand Cherokee WK platform is generally solid mechanically but plagued by specific weak points in the drivetrain and electronics. The 3.7L V6 has catastrophic bottom-end failures, while all variants share transmission cooler and TIPM electrical nightmares.
3.7L V6 Bottom-End Failure (Spun Rod Bearings)
Common · high severity
Typical onset: 80,000-150,000 mi
Symptoms: Metallic knocking at idle that worsens with RPM, Oil pressure warning light flickering or staying on, Metal shavings in oil during changes, Sudden catastrophic loss of power with severe knocking
Fix: Engine rebuild or replacement required. Spun bearings destroy crankshaft journals. Short block replacement takes 18-24 hours labor. Many shops recommend used or remanufactured engine swap instead of rebuild due to block damage.
Estimated cost: $4,500-7,500
Transmission Oil Cooler Failure (All Engines)
Common · high severity
Typical onset: 60,000-120,000 mi
Symptoms: Transmission fluid in coolant (strawberry milkshake in overflow), Coolant in transmission (slipping, delayed engagement), Overheating transmission or engine, Check engine light with transmission codes
Fix: Factory cooler inside radiator fails, cross-contaminating fluids. Requires new radiator, full transmission flush (often multiple flushes), and external cooler installation. If driven after mixing, transmission rebuild needed. 6-8 hours labor for cooler fix, add 20+ hours if trans damaged.
Estimated cost: $1,200-2,000 (cooler only), $3,500-5,500 (if trans damaged)
TIPM (Totally Integrated Power Module) Failure
Common · medium severity
Symptoms: Fuel pump cycling randomly causing no-start or stalling, Wipers activating on their own, Horn honking spontaneously, Windows/locks operating erratically, ABS/traction control lights with no codes stored
Fix: The TIPM (fuse/relay box under hood) has internal relay failures, especially fuel pump relay. Replacement unit required; no reliable repair exists despite aftermarket 'fix' services. 2-3 hours labor including programming.
Estimated cost: $800-1,400
Transfer Case Mode Selector Failure (4WD Models)
Occasional · medium severity
Typical onset: 70,000-130,000 mi
Symptoms: Service 4WD message on dash, Unable to shift between 2WD/4WD modes, Grinding or clunking when attempting mode changes, 4WD engaging/disengaging randomly while driving
Fix: Encoder motor on transfer case fails or wiring harness corrodes. Often just motor replacement (3 hours labor), but can require full transfer case if internal shift fork damage occurred from grinding. Recall 14V388 addressed some units but not all affected.
Symptoms: Clunking over bumps from front end, Steering wander or loose feeling, Uneven tire wear on inside edges, Vibration during braking
Fix: Factory bushings separate or tear, especially in rust-belt states. Replace entire control arms (bushings not sold separately by Chrysler). 2.5-3 hours labor for both sides, requires alignment after.
Estimated cost: $500-800
Rear Brake Caliper Seizure
Occasional · medium severity
Typical onset: 50,000-90,000 mi
Symptoms: Parking brake stuck or won't release fully, Rear brakes dragging (hot wheels after driving), Premature rear pad/rotor wear, Parking brake warning stays on or flickers
Fix: Rear calipers with integrated parking brake mechanism seize from corrosion. Requires caliper replacement, cannot be rebuilt reliably. Often both sides done together. 2-3 hours labor including bleeding. Recall 10V353 covered some 2008s.
Estimated cost: $600-900
5.7L Hemi Lifter/Cam Failure (MDS Engines)
Occasional · high severity
Typical onset: 90,000-150,000 mi
Symptoms: Loud ticking/tapping from engine that doesn't quiet after warmup, Check engine light with misfire codes (P0300-P0308), Loss of power on acceleration, Metal debris in oil filter
Fix: MDS (cylinder deactivation) lifters fail, wiping camshaft lobes. Requires heads-off repair: all lifters, camshaft, sometimes heads if rocker damage present. 16-22 hours labor. Using quality oil and changing at 5k intervals helps prevent but doesn't eliminate risk.
Estimated cost: $3,500-5,500
Owner tips
Install external transmission cooler immediately if not present — the factory setup is a ticking time bomb
On 3.7L engines, use only 5W-20 full synthetic and change every 5,000 miles max to extend bearing life
TIPM failures are when, not if — budget $1,000 or keep a spare relay box if you find one at a yard
Avoid 4WD mode on dry pavement; the system is fragile and encoder motors are expensive
Check for TSB 18-024-08 (transmission shudder) and 18-027-11 (TIPM) — some dealers still honor goodwill cases
Buy only if you find a well-maintained Hemi 4WD with service records and budget $2,000/year for the inevitable TIPM and trans cooler — avoid 3.7L V6 entirely due to engine grenading risk.
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.
Unlock any single procedure for $3 — or become the founding sponsor and we generate every common job on this Grand Cherokee, with your name on each one.
Fitment notes: Standard top post battery located in engine bay
As an Amazon Associate, OLP earns from qualifying purchases — how we link. This never changes the specs we publish.
Every control module on the 2008-2010 Jeep Grand Cherokee — where it lives, replacement time, and what it takes to program a replacement. Modules marked dealer / factory tool won't work after a part swap alone — budget for programming.
⚠️ Optional equipment; sensor calibration may be needed
Backup Camera Module (BCM)0.5 hr R&Rno coding
📍 Integrated into liftgate handle or rear bumper
⚠️ Optional equipment; plug-and-play on most models
Aftermarket tool coverage varies by software version and vehicle build — treat "aftermarket tool" rows as "usually possible" and verify against your tool maker's coverage list before promising a customer. Spot a wrong location or hour? Tell us — corrections ship fast here.
Chrysler Group LLC (Chrysler) is recalling certain model year 2008 Chrysler 300 vehicles manufactured May 31, 2007, to May 12, 2008, Dodge Magnum vehicles manufactured May 23, 2007, to May 12, 2008, Dodge Charger vehicles manufactured May 24, 2007, to May 12, 2008, Jeep Commander vehicles manufactured April 3, 2007, to May 12, 2008, and Jeep Grand Cherokee vehicles manufactured March 21, 2007, to May 12, 2008. In the affected vehicles, the ignition key (FOBIK) may not return to the "ON" position after being rotated to the "START" position, instead sticking between the two positions. Potentially, while the vehicle is being driven, the ignition may inadvertently move through the "RUN" position to the "ACCESSORY" or "OFF" ignition position, turning off the engine.
Consequence: If the ignition stays between "START" and "ON" positions it could cause loss of certain electrical functions. If the ignition key inadvertently moves into the "OFF" or "ACCESSORY" position, the engine will turn off, which will then depower various key safety systems including but not limited to air bags, power steering, and power braking. Loss of functionality of these systems may increase the risk of crash and/or increase the risk of injury in the event of a crash.
Remedy: Chrysler will notify owners, and dealers will replace the ignition switch and key FOBs, free of charge. The recall began August 19, 2015. Owners may contact Chrysler customer service at 1-800-853-1403. Chrysler's number for this recall is P57.
POWER TRAIN:TRANSFER CASE (4-WHEEL DRIVE) · 13V175000
2013-05-07
Chrysler Group LLC (Chrysler) is recalling certain model year 2005-2010 Jeep Grand Cherokee vehicles manufactured February 11, 2004, through March 9, 2010; and 2006-2010 Jeep Commander vehicles manufactured January 31, 2005, through March 10, 2010. A transfer case electrical failure may result in an unintentional shifting of the transfer case into the neutral position.
Consequence: If the vehicle shifts into neutral, it may roll away increasing the risk of a crash or personal injury.
Remedy: Chrysler will notify owners, and dealers will reflash the final drive controller which governs the transfer case, with new software, free of charge. The recall began on August 15, 2013. Owners may contact Chrysler at 1-800-247-9753. Chrysler's recall campaign number is N23.
SUSPENSION · 09E039000
2009-06-19 · PE09005
ROCK KRAWLER IS RECALLING 44 PERFORMANCE SUSPENSION SYSTEMS SOLD AS AFTERMARKET EQUIPMENT FOR USE ON THE VEHICLE LISTED ABOVE. THESE SUSPENSION SYSTEMS WERE PRODUCED WITH GRADE 2 CARRIAGE BOLTS INSTEAD OF THE PROPER GRADE 5 CARRIAGE BOLTS. THE IMPROPER GRADE 2 CARRIAGE BOLTS COULD EXPERIENCE A LOSS OF CLAMPING FORCE FOR THE BOTTOM STRUT FORK.
Consequence: THIS CONDITION COULD CAUSE A LOSS OF EFFECTIVE LIFT AND LOWERING OF THE AFFECTED VEHICLE, POSSIBLY CREATING THE DRIVER TO PANIC WHICH COULD POSSIBLY LEAD TO A VEHICLE CRASH.
Remedy: ROCK KRAWLER WILL NOTIFY OWNERS AND PROVIDE A FREE REMEDY. THE SAFETY RECALL BEGAN ON OCTOBER 15. 2008. ALL THE AFFECTED UNTITS HAVE BEEN REMEDIED. OWNERS MAY CONTACT ROCK KRAWLER AT 1-518-270-9822.
ELECTRICAL SYSTEM · 08V059000
2008-02-06
CHRYSLER IS RECALLING 1,338 MY 2008 JEEP GRAND CHEROKEE AND COMMANDER VEHICLES. THE FRONT CONTROL MODULE MAY HAVE BEEN INCORRECTLY MANUFACTURED.
Consequence: THIS COULD CAUSE THE ENGINE TO STALL WHILE DRIVING OR NOT TO START AND/OR CAUSE THE WINDSHIELD WIPERS TO BECOME INOPERATIVE. ENGINE STALLING OR INOPERATIVE WIPERS COULD CAUSE A CRASH WITHOUT WARNING.
Remedy: DEALERS WILL INSPECT THE MODULE AND REPLACE IT IF NECESSARY. THE RECALL BEGAN ON FEBRUARY 18, 2008. OWNERS MAY CONTACT CHRYSLER AT 1-800-853-1403.
SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS:DISC:CALIPER · 07V415000
2007-09-12
ON CERTAIN SPORT UTILITY VEHICLES, FRONT BRAKE CALIPERS IN A CERTAIN LOT MAY HAVE BEEN MANUFACTURED FROM GRAY IRON INSTEAD OF DUCTILE IRON AS DESIGNED AND COULD FRACTURE WITHOUT WARNING.
Consequence: THIS WOULD INCREASE THE VEHICLE'S STOPPING DISTANCE AND COULD CAUSE A CRASH.
Remedy: DEALERS WILL INSPECT THE FRONT BRAKE CALIPERS TO SEE IF THEY FALL INTO THIS LOT AND, IF SO, WILL REPLACE THEM FREE OF CHARGE. THE RECALL BEGAN ON OCTOBER 22, 2007. OWNERS MAY CONTACT DAIMLERCHRYSLER AT 1-800-853-1403.
Fuel economy (EPA)
City
15mpg
Highway
20mpg
Combined
17mpg
Fuel
Regular Gasoline
Capability & size
EPA class
Sport Utility Vehicle - 2WD
Wiper blades
WK generation (2005-2010). Rear may be 13-inch on some models.
Size-standard part numbers — verify your connector type before buying. Rear blades are model-specific; check the package's vehicle list.
Fuel economy figures are EPA data via fueleconomy.gov (median across matching trims). Performance figures are compiled estimates for the 2008 Jeep Grand Cherokee 3.7L V6 and can vary by trim.
🔧 Database maintained under the daily editorial review of Chris Hackleman · Master Technician · 20+ years and Jeff Moore · Master Lexus & Toyota Mechanic · 20+ years.