g35 transmission manual

The Infiniti G35, particularly models with automatic transmissions, has faced reported issues․ Owners have noted problems within the powertrain category․ Identifying transmission problem symptoms is crucial for timely diagnosis and repair․ Let’s explore the common concerns associated with the Infiniti G35 transmission․

Common Infiniti G35 Transmission Problems

Several Infiniti G35 owners have reported automatic transmission issues․ The 2005 model is plagued by transmission control module failures․ This results in erratic shifting, hesitation, or even complete transmission failure․ Harsh shifting is also indicated by diagnostic trouble codes․ Identifying these issues is essential․

Erratic Shifting and Hesitation

One of the most frequently reported problems by Infiniti G35 owners involves erratic shifting patterns․ This can manifest as unpredictable gear changes, where the transmission shifts up or down at inappropriate times, impacting the overall driving experience․ The vehicle may struggle to maintain a consistent speed, leading to jerky movements and a lack of smooth acceleration․

Hesitation is another common symptom, where the transmission hesitates or pauses before engaging the next gear․ This delay can be particularly noticeable when accelerating from a standstill or attempting to overtake another vehicle․ The engine might rev up without a corresponding increase in speed, creating a feeling of sluggishness and unresponsiveness․

These issues can stem from a variety of underlying causes, including problems with the transmission control module (TCM), faulty sensors, or issues within the valve body․ Addressing erratic shifting and hesitation promptly is crucial to prevent further damage to the transmission and ensure safe driving conditions․ Ignoring these symptoms can lead to more significant and costly repairs down the line․

Delayed Engagement and Slipping

Delayed engagement is a frustrating issue where there’s a noticeable pause between shifting gears and the transmission actually engaging․ For instance, when shifting from Park to Drive or Reverse, there might be a delay before the car moves․ This can be accompanied by a clunking sound or a sudden jolt when the gear finally engages․

Slipping, on the other hand, occurs when the transmission fails to maintain a solid grip on the gears, resulting in a loss of power and acceleration․ This often manifests as the engine revving higher than usual without a corresponding increase in speed․ The car might feel like it’s struggling to climb hills or accelerate, and the tachometer might fluctuate erratically․

Both delayed engagement and slipping can be indicative of serious internal transmission problems, such as worn clutches, low transmission fluid, or a faulty torque converter․ These issues can significantly impact the vehicle’s performance and fuel efficiency, and they should be addressed promptly to avoid further damage and potential transmission failure․ Regular maintenance, including fluid checks and changes, can help prevent these problems․

Harsh Shifting Issues (P1710, P1716)

Harsh shifting is a common complaint among Infiniti G35 owners, often characterized by abrupt and jarring gear changes․ This can feel like a sudden lurch or jolt when the transmission shifts, making for an uncomfortable driving experience․ Diagnostic trouble codes P1710 and P1716 are often associated with these issues․

Code P1710 typically indicates a problem with the transmission fluid temperature sensor, which can affect the transmission’s ability to shift smoothly․ Code P1716 usually points to an issue with the direct clutch function․

Low transmission fluid is a frequent culprit behind harsh shifting․ When the fluid level is low, the transmission may struggle to maintain proper pressure, leading to rough gear changes․ Other potential causes include worn or damaged internal components, such as clutches or valve body issues․ Addressing harsh shifting promptly is crucial to prevent further damage and ensure a smoother, more reliable driving experience․ Regular transmission maintenance, including fluid checks and changes, can help mitigate these problems․

Identifying Symptoms of Transmission Issues

Recognizing the early warning signs of transmission problems in your Infiniti G35 is crucial for preventing costly repairs and ensuring your vehicle’s longevity․ Several symptoms can indicate underlying issues with your automatic transmission․ These include delayed engagement when shifting gears, where there is a noticeable pause before the transmission responds․

Slipping or jerking movements during acceleration are also common indicators, often felt as a momentary loss of power or an erratic surge․ Unusual noises, such as whining, clunking, or humming sounds emanating from the transmission area, should raise concern․ Difficulty shifting gears, whether it’s struggling to shift into a specific gear or experiencing hard or abrupt shifts, can signal problems․

Changes in transmission fluid color or odor, such as a dark or burnt smell, suggest overheating or contamination․ If you observe any of these symptoms, it’s essential to consult a qualified mechanic for a thorough inspection and diagnosis․

Worst G35 Model Years for Transmission (2003-2006)

Several model years of the Infiniti G35 have been identified as having a higher propensity for transmission issues․ Specifically, the 2003, 2004, 2005, and 2006 model years appear more frequently in reports of transmission problems․ Owners have reported experiencing various issues, including erratic shifting, hesitation, and even complete transmission failure․

One of the most common problems reported in these model years is a failure of the transmission control module (TCM)․ This failure can lead to unpredictable shifting behavior and significant driveability concerns․ The RE5R05A transmission, used in these G35 models, seems particularly susceptible to these issues․ Industry reviews, NHTSA statistics, reported problems, and consumer feedback have contributed to this assessment․

If you own or are considering purchasing a G35 from these model years, be aware of the potential for transmission-related problems․

Best G35 Model Years for Transmission (2007-2008)

In contrast to the earlier years, the 2007 and 2008 Infiniti G35 models are generally considered the best concerning transmission reliability․ These model years have fewer reported issues related to the automatic transmission compared to the 2003-2006 versions․ This improved reliability makes them a more desirable option for those seeking a G35 with a reduced risk of transmission problems․

The improvements in these later model years may be attributed to design refinements, improved component quality, or enhanced manufacturing processes implemented by Infiniti․ While no vehicle is entirely immune to potential issues, the 2007 and 2008 G35 models offer a better track record regarding transmission performance and durability․

If you’re prioritizing transmission reliability when purchasing an Infiniti G35, focusing on the 2007 and 2008 model years is a wise choice․ However, regular maintenance and careful driving habits are still crucial for preserving the transmission’s longevity․

Causes of Common RE5R05A Transmission Problems

Several factors contribute to RE5R05A transmission issues, including dirty fluid, clogged filters, and faulty speed sensors․ Direct clutch solenoid valve malfunctions and inadequate line pressure can also cause problems․ Addressing these issues promptly can prevent more extensive damage․

Dirty Transmission Fluid and Clogged Filter

Dirty transmission fluid and a clogged filter are significant contributors to RE5R05A transmission problems in Infiniti G35 models․ Over time, transmission fluid degrades and becomes contaminated with wear particles and debris․ This dirty fluid loses its ability to properly lubricate and cool the transmission components, leading to increased friction and heat․ A clogged transmission filter restricts fluid flow, further exacerbating these issues․

When the transmission fluid is dirty, it can cause various problems, including erratic shifting, delayed engagement, and slipping․ The increased friction and heat can also damage the transmission’s internal components, such as the clutches and bands․ Moreover, the valve body can suffer from blockages due to the particulate matter circulating within the system․ Regular transmission fluid changes and filter replacements are essential for maintaining the health and performance of the RE5R05A transmission․

Neglecting this maintenance can result in costly repairs or even complete transmission failure․ Therefore, adhering to the manufacturer’s recommended service intervals for fluid and filter changes is paramount․

Faulty Vehicle Speed Sensor or Solenoid Valve

A faulty vehicle speed sensor (VSS) or solenoid valve can significantly impact the performance of the Infiniti G35’s RE5R05A transmission․ The VSS provides critical data to the transmission control module (TCM) regarding the vehicle’s speed, which is essential for proper shift timing and gear selection․ When the VSS malfunctions, it can send inaccurate or no signals to the TCM, leading to erratic shifting, harsh engagement, or even a complete failure to shift․

Similarly, solenoid valves play a crucial role in controlling the flow of transmission fluid to different parts of the transmission, enabling gear changes․ If a solenoid valve fails, it can cause delayed engagement, slipping, or harsh shifting․ Specific diagnostic trouble codes, like P1710 and P1716, may indicate issues related to solenoid valve performance․ Replacement of faulty VSS or solenoids is often necessary to restore proper transmission functionality․

Addressing these issues promptly can prevent further damage and ensure smooth operation․

Inadequate Line Pressure

Inadequate line pressure within the Infiniti G35’s RE5R05A transmission can lead to various performance issues․ Line pressure is crucial for proper clutch engagement and gear changes․ When the pressure is insufficient, the clutches may not engage fully, resulting in slippage, delayed engagement, or harsh shifting․ Several factors can contribute to low line pressure, including a worn-out transmission pump, internal leaks within the transmission, or a faulty pressure regulator valve․

Symptoms of inadequate line pressure may include a noticeable delay when shifting between gears, a slipping sensation during acceleration, or harsh, abrupt shifts․ Addressing this issue promptly is essential to prevent further damage to the transmission’s internal components․ Diagnosing the root cause of low line pressure often requires specialized tools and expertise․ Repair options may include replacing the transmission pump, repairing internal leaks, or replacing the pressure regulator valve․ Maintaining proper transmission fluid levels and regular servicing can help prevent line pressure issues․

Potential Electrical Issues in the Valve Body (P1757, P1759)

Electrical problems within the valve body of the Infiniti G35’s RE5R05A transmission can trigger diagnostic trouble codes P1757 and P1759․ These codes often indicate electrical faults within the valve body’s solenoids or wiring․ The valve body acts as the transmission’s control center, directing fluid to various clutches and gears based on input from sensors and the vehicle’s computer․ Electrical issues can disrupt this process, leading to erratic shifting, limp mode activation, or complete transmission failure․

Code P1757 typically relates to the solenoid valve, while P1759 suggests problems within the valve body’s electrical circuit․ Symptoms may include harsh shifting, failure to shift gears, or the transmission becoming stuck in a single gear․ Diagnosing these electrical issues requires specialized diagnostic tools and a thorough understanding of the transmission’s electrical system․ Repair options may involve replacing faulty solenoids, repairing damaged wiring, or replacing the entire valve body assembly․ Addressing these electrical problems promptly is essential to restore proper transmission function․