When Did The Metallic 5s Come Out

So, you're wondering when the "Metallic 5s" came out? You're likely experiencing some shifting problems, possibly with your transmission slipping or jerking, and you’ve heard the term "Metallic 5s" associated with the issues. Let's break it down. The term often refers to the Aisin AWF8F35 8-speed automatic transmission, particularly in the context of issues related to the valve body and the accumulation of metallic debris. These transmissions started appearing in various vehicles around 2017 and became more widespread in model years 2018 through 2020 and beyond. Understanding this timeline is crucial because the symptoms, root cause, and recommended fixes all revolve around issues that develop with age and mileage, particularly concerning the valve body's sensitivity to metallic contamination.

Symptoms of Metallic Contamination in Aisin AWF8F35 Transmissions

Recognizing the symptoms early can save you from significant repairs down the road. Here's a detailed list of common issues associated with metallic debris buildup in these transmissions:

Harsh or Jerky Shifting: This is often the first and most noticeable symptom. Shifts, especially between lower gears (1st to 2nd, 2nd to 3rd), may feel rough or abrupt.
Transmission Slipping: The engine RPMs will increase without a corresponding increase in vehicle speed. This can occur during acceleration or when attempting to maintain speed uphill.
Delayed Engagement: When shifting from Park or Neutral into Drive or Reverse, there might be a noticeable delay before the transmission engages.
Erratic Shifting: The transmission might shift inappropriately, such as shifting too early or too late, or even skipping gears altogether.
Shuddering or Vibration: You may feel a shudder or vibration, particularly at lower speeds or during light acceleration.
Check Engine Light (CEL): The CEL may illuminate, often accompanied by transmission-related diagnostic trouble codes (DTCs) such as P0731 (Gear 1 Incorrect Ratio), P0732 (Gear 2 Incorrect Ratio), P0733 (Gear 3 Incorrect Ratio), P0734 (Gear 4 Incorrect Ratio), P0735 (Gear 5 Incorrect Ratio), P0736 (Reverse Incorrect Ratio), and codes related to solenoid performance.
Torque Converter Clutch (TCC) Issues: The TCC may not lock up properly, leading to poor fuel economy and potential shuddering.
Limp Mode: In severe cases, the transmission may enter "limp mode," which limits the vehicle's speed and gear selection to protect the transmission from further damage.
Whining Noise: A whining noise emanating from the transmission area, particularly during acceleration, can indicate internal wear and potential pump issues exacerbated by metallic debris.

Root Cause: Metallic Debris and Valve Body Sensitivity

The Aisin AWF8F35, while generally a robust transmission, is known to be sensitive to contamination. The primary culprit is the accumulation of metallic debris from normal wear and tear inside the transmission. This debris consists of tiny particles of steel, aluminum, and clutch material. Here’s a breakdown of how it happens:

Normal Wear: Over time, the internal components of the transmission, such as gears, clutches, and bearings, experience wear. This wear generates metallic particles.
Valve Body Sensitivity: The valve body is the brain of the transmission, controlling the flow of transmission fluid to various components to facilitate shifting. It contains numerous small valves and solenoids with very tight tolerances. These valves are highly susceptible to becoming clogged or damaged by even small amounts of metallic debris.
Solenoid Malfunction: Metallic particles can interfere with the proper operation of the solenoids within the valve body. These solenoids control the hydraulic pressure that actuates the clutches and brakes responsible for gear changes. Malfunctioning solenoids can lead to erratic shifting, slipping, and other performance issues.
Fluid Degradation: The presence of metallic debris accelerates the degradation of the transmission fluid. Contaminated fluid loses its lubricating properties and can cause further wear and tear.
Poor Maintenance: Infrequent or improper transmission fluid changes exacerbate the problem. Fresh fluid helps to flush away debris and maintain proper lubrication.

Consequences of Ignoring the Problem

Ignoring these symptoms can lead to significant and costly damage. Here's what can happen if you delay addressing the issue:

Increased Wear: Continued operation with contaminated fluid and a malfunctioning valve body will accelerate the wear of internal components.
Clutch Failure: Slipping and harsh shifting can lead to excessive heat buildup and premature failure of the clutches.
Valve Body Damage: The valve body can become irreparably damaged, requiring replacement.
Torque Converter Failure: Metallic debris can damage the torque converter, leading to poor performance and potential failure.
Transmission Failure: In the worst-case scenario, the entire transmission can fail, requiring a complete rebuild or replacement.
Safety Concerns: Erratic shifting and transmission slipping can create safety hazards, especially in heavy traffic or during emergency maneuvers.

Recommended Fixes

The appropriate fix depends on the severity of the problem and the extent of the damage. Here are some common solutions:

Transmission Fluid Flush and Filter Change: This is the first and often simplest step. A complete flush with high-quality, manufacturer-approved transmission fluid can help remove contaminants and improve performance. Be sure to replace the transmission filter as well. Note: A simple drain and fill often only replaces a portion of the fluid, a full flush is recommended.
Valve Body Cleaning or Replacement: If the valve body is heavily contaminated, it may need to be cleaned or replaced. Some shops offer valve body cleaning services, which involve disassembling the valve body and thoroughly cleaning each component. However, in many cases, replacement is the more reliable option. A remanufactured valve body can be a cost-effective alternative to a brand-new unit.
Solenoid Replacement: If specific solenoids are malfunctioning, they can be replaced individually. This requires specialized knowledge and equipment.
Transmission Rebuild: In cases of severe damage, a complete transmission rebuild may be necessary. This involves disassembling the transmission, inspecting all components, replacing worn or damaged parts, and reassembling the transmission.
Transmission Replacement: If the transmission is beyond repair, replacement may be the only option. This is the most expensive solution but may be necessary to restore the vehicle to proper working order.
Installation of an Inline Filter: Many shops recommend installing an aftermarket inline transmission filter to provide additional filtration and prevent future contamination. This is a relatively inexpensive preventative measure.

Cost Estimates and Shop Advice

The cost of repairs can vary widely depending on the specific issue and the shop you choose. Here are some general estimates:

Transmission Fluid Flush and Filter Change: $200 - $400
Valve Body Cleaning: $300 - $600
Valve Body Replacement (Remanufactured): $800 - $1500 (including labor)
Solenoid Replacement (Individual): $200 - $500 per solenoid (including labor)
Transmission Rebuild: $3000 - $6000
Transmission Replacement (New or Remanufactured): $4000 - $8000+
Inline Filter Installation: $100 - $200

Important Advice:

Choose a reputable shop: Look for a shop that specializes in transmission repair and has experience working with Aisin transmissions. Read online reviews and ask for recommendations.
Get a thorough diagnosis: Don't just assume the problem is the valve body. Have the shop perform a comprehensive diagnosis to identify the root cause of the issue.
Ask for a detailed estimate: Make sure the estimate includes a breakdown of all parts and labor costs.
Inquire about warranties: Find out what kind of warranty the shop offers on their repairs.
Consider a second opinion: If you're unsure about the diagnosis or the recommended repairs, get a second opinion from another shop.

Technical Service Bulletins (TSBs) and Community Data

While not always a direct recall, manufacturers often issue Technical Service Bulletins (TSBs) to address common issues and provide repair guidelines. Check online databases and manufacturer websites for TSBs related to the Aisin AWF8F35 transmission. Forums and online communities dedicated to specific vehicle models are also valuable resources. Users often share their experiences, repair solutions, and cost estimates, providing real-world insights into common problems and effective fixes. For example, you might find discussions about specific DTCs related to the transmission and the most common solutions that other owners have found successful. These can be incredibly helpful in guiding your repair process and ensuring you're getting the best possible service.

Remember, addressing transmission issues promptly can prevent costly repairs and ensure the longevity of your vehicle. Proper maintenance, including regular fluid changes, is key to keeping your Aisin AWF8F35 transmission running smoothly for years to come.