2007 Dodge Ram 1500 powertrain problems

Rear differential gears fracture, producing metal fragments that circulate in the fluid. The differential seizes or produces loud whining/humming, sometimes accompanied by violent bouncing and rear-wheel lockup. Failure occurs across a wide mileage range (as early as under 2,000 miles to 160,000+ miles) and at various speeds.

When: Various mileages: reported at 19,964 miles, 25,165 miles, 49,975 miles, 81,000 miles, 89,000 miles, 101,309 miles, 111,000 miles, 123,000 miles, 160,000+ miles; speeds range from 15 mph to 65 mph

Symptoms owners cite: Violent rear-end bouncing when reaching ~35 mph or higher; Loud whine or hum from rear differential; Chirping from rear wheels; Rear wheels lock up unexpectedly; Metal chunks found in differential fluid when inspected

Repairs/costs cited: Differential rebuild or replacement; repair costs reported as $1,800–$4,300. One owner paid $3,000 out-of-pocket for second failure despite being within 12-month/12,000-mile warranty period.

Recalls/TSBs owners mention: Dealer noted the problem occurs frequently and performed rework and fluid changes (diff fluid plus limited-slip additive). Subsequent failures not covered by warranty. References to recalls on 2005 and 2009–2010 models (NHTSA 13V038000, 14V796000) but 2007 models reportedly excluded or not eligible.

Pinion nut on the driveshaft yoke backs off or becomes loose, allowing the driveshaft to partially or completely separate from the rear differential. This triggers immediate rear-wheel lockup and often a loud bang or grinding noise. The driveshaft may fall to the ground or snap off entirely.

When: Reported at mileages including under 300 miles after prior incident, ~111,000 miles, ~160,000 miles, ~165,000 miles; speeds range from 15–20 mph to 65 mph

Symptoms owners cite: Loud bang or popping sound from the rear; Severe grinding or dragging noise; Rear wheels lock up without warning; Driveshaft lies on road or snaps at the axle; Fluid leaking from rear differential; Loss of vehicle control or inability to move vehicle forward

Repairs/costs cited: Driveshaft replacement and/or rear-end rebuild. Estimated/actual repair costs $2,000–$3,000. Aftermarket repair kits mentioned to prevent C-clip failure.

Recalls/TSBs owners mention: Owners reference recalls on 2005 (14V796000) and 2009–2010 models (12V474000, expansion 14V796000) with same issue. 2007 models not always eligible. Chrysler told one owner manufactured-in-Canada trucks don't qualify for campaign 06V341000. No TSB noted in complaints.

Transmission shifts abruptly into reverse while driving forward at highway speeds (60+ mph) or fails to engage reverse when commanded. The reverse shift is brief and unintended, causing tire lockup. In other cases, reverse simply will not respond. Diagnostic code 1577 (ATM reverse solenoid) retrieved in one case.

When: Reported at mileages under 2,000 miles, 21,400 miles, 24,000 miles, 46,731 miles, 53,806 miles; speeds 15 mph (parking lots) to 65+ mph (highway)

Symptoms owners cite: Vehicle shifts into reverse on its own at highway speeds without driver input; Tires briefly lock up when unintended reverse engagement occurs; Vehicle refuses to shift into reverse when pedal is depressed; Reverse gear fails intermittently or hesitates to respond; No warning or error codes captured (in some cases)

Codes mentioned: 1577 (Reverse solenoid detected by code reader during highway test)

Repairs/costs cited: Valve body assembly replacement ($950 covered by extended warranty, $50 deductible in one case). PCM reprogramming attempted but symptoms persisted or returned. Some failures not repaired.

Recalls/TSBs owners mention: TSB noted for this defect. Dealers attempted PCM reprogramming without full resolution. Failure frequencies declined but problem recurred.

Transmission drops out of drive, fails to shift into overdrive, slips to lower gears unexpectedly, or locks up at stops. Symptoms range from intermittent to chronic, sometimes with a loud clunk preceding the loss of power.

When: Reported at mileages less than 8,800 miles, 20,000 miles, 40,000 miles, 46,731 miles, 232,575 miles

Symptoms owners cite: Vehicle intermittently drops out of drive; does not accelerate when accelerator depressed; Transmission will not shift into overdrive, causing high engine RPM and poor fuel economy; Loud clunk followed by no power when starting out from a stop; Transmission slips to lower gears without driver input, throwing occupants forward; Grinding noise when shifting into reverse; Transmission jumps when placed into drive; Vehicle locked in one gear and won't shift

Repairs/costs cited: Transmission rebuild at 40,000 miles; one owner believes high idle RPM (1,300–1,500 on startup) was the root cause. Some diagnoses required check engine light to illuminate before dealers would investigate.

Recalls/TSBs owners mention: Dealers unable to replicate in most cases. One dealer advised driver to manipulate foot pedal and claimed vehicle was operating as designed. No recalls or TSBs mentioned by dealers in these complaints.

Transfer case shifts into 4WD Low or 4WD Lock without driver input, sometimes at highway speeds where this is unsafe. Vehicle may partially lock, preventing full turning or causing right-front tire to lock up. Some owners report simultaneous loss of electrical systems and brake function.

When: Reported at speeds ranging from idle to 60+ mph; mileages include 52,000 miles, at various intervals over vehicle life

Symptoms owners cite: Vehicle engages 4WD Low on its own at various speeds including highway speeds; 4WD Lock engages unexpectedly and shifts transmission into neutral; Front tire locks up, preventing steering or forward motion; Loss of electrical systems (all gauges drop to zero, instrument lights go out); Brakes fail or brake function impaired; 4WD will not fully disengage; vehicle becomes undrivable; 4WD Light flashes; 'SERV 4WD' message appears; Front-end vibration or shaking when 4WD engaged

Repairs/costs cited: Replacement of front actuator, flashing of TIPM (Totally Integrated Power Module), replacement of transfer case motor. Symptoms often persist despite multiple repair attempts (one owner visited five dealerships without resolution).

Recalls/TSBs owners mention: Dealerships diagnosed various components (AC pressure switch, TIPM, transfer case actuator motor) without identifying a consistent root cause. No recalls noted. Intermittent nature makes diagnosis difficult; problem may not recur for six months.

Rear brakes lock up suddenly at highway speeds, causing severe bouncing and wheel seizure. Investigation by repair shops traced this to a leak in a rear differential seal allowing differential fluid to contact rear brake pads, causing them to swell and bind.

When: Reported after brake service; initial lockup occurred at 60+ mph, recurred over approximately two months

Symptoms owners cite: Rear wheels lock up suddenly at highway speeds (55+ mph); Severe bouncing in rear end; Brake pads swell and bind due to differential fluid contamination; Rear end locks up again despite multiple repair attempts

Repairs/costs cited: Brake service, parking brake adjustment, repair of rear differential seal leak. Repairs made but lockups recurred; owner now drives at reduced highway speeds.

Recalls/TSBs owners mention: No manufacturer response documented in narrative.

Engine accelerates uncontrollably without driver input, overwhelming the brakes. One case involved sudden acceleration when exiting a parking lot; another involved the vehicle shifting abruptly into gear at highway speed with simultaneous engine over-throttle.

When: One case at ~15 mph in parking lot; one case at 65 mph on highway

Symptoms owners cite: Vehicle accelerates uncontrollably when driver presses accelerator moderately; Brakes cannot overcome engine power; Front brakes lock up, loss of steering; Vehicle shifts abruptly into gear with loud pop, then continues to accelerate

Repairs/costs cited: Vehicle crashed into guard rail at parking-lot incident. Owner awaiting response from manufacturer; second case not repaired.

Recalls/TSBs owners mention: Manufacturer came out and towed first vehicle to shop; response pending at time of complaint filing.

Plastic clamp holding the shift cable breaks or falls off, allowing the cable to contact the muffler. Heat from the muffler burns through the cable insulation and snaps it, rendering the transmission inoperative or unpredictable.

When: Reported at 59,436 miles

Symptoms owners cite: Shift cable comes to rest on muffler; Insulation on cable burns through due to muffler heat; Cable snaps

Repairs/costs cited: Cable replacement required; repair cost not stated.

Recalls/TSBs owners mention: Chrysler denied warranty assistance, stating plastic clamps are common on vehicles and the clamp was damaged (not a defect). Offered no reimbursement.

Front axle shaft fractures, requiring replacement. Associated front hub and bearing also deteriorate, causing front-end vibration that mimics a locked caliper or wheel imbalance.

When: Reported at ~100,000+ miles (vibration noticed in March 2010, persisted through summer, diagnosis in November 2010)

Symptoms owners cite: Strong vibration in front left side of vehicle, like driving on rumble strip; Vibration present at 25 mph and above, speed-independent; Intermittent vibration throughout summer months; Feels as though driving on the rim

Repairs/costs cited: Front axle shaft replacement covered under powertrain warranty. Front hub and bearing replacement not covered by warranty.

Recalls/TSBs owners mention: Owner notes this appears to be subject of 2006 model-year recalls but not the 2007 model addressed here.

Vehicle engine shuts off while driving, causing loss of power steering and braking. Owner discovered insulated harness on passenger side had caught fire, likely due to a short to chassis. OEM wiring had no standoffs to keep harness away from the chassis on horizontal runs, creating fire risk near the oil filter.

When: No mileage or timing given

Symptoms owners cite: Engine shuts off while driving; Loss of steering and braking power; Smell from under passenger side; Insulated harness caught fire near oil filter; Check engine code: Bank 2 knock sensor, oil viscosity wrong

Codes mentioned: Bank 2 knock sensor, Oil viscosity wrong

Repairs/costs cited: Owner replaced section of harness and documented with photographs. Repair cost not stated.

Recalls/TSBs owners mention: No manufacturer response documented.