8-Speed RWD Auto (Kia Stinger, Genesis)
The 8-Speed RWD Auto for Kia Stinger and Genesis models launched in the mid-2010s, promoting refined shifts and a sportier feel. At first, drivers praised its lively acceleration and smooth cruising. But in time, some noticed harder shifts under spirited driving, sparking questions about calibration.
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Common Problems With 8-Speed RWD Auto (Kia Stinger, Genesis)
Common 8-Speed RWD Auto (Kia/Genesis) Problems
Found in performance-oriented or luxury RWD models, this gearbox focuses on responsiveness but may exhibit certain stress-related issues.
Clunk on Hard Downshifts
When dropping gears abruptly, a pronounced mechanical “clunk” can travel through the drivetrain.
Potential Causes: Aggressive shift mapping, minor slack in the driveshaft or universal joints, or TCM errors.
Torque Converter Slip Feeling
At mid-range RPM, a slight surge or fluctuation in engine speed indicates the lock-up clutch struggling to hold steady torque.
Potential Causes: Wear on converter friction surfaces, fluid nearing expiry, or repeated heavy throttle usage.
Overheating in Sporty Driving
Frequent high-rpm shifts push fluid temps up. If cooling is insufficient, the transmission may reduce shift aggression or display warnings.
Potential Causes: Inadequate factory cooler, extended performance driving, or partial fluid breakdown.
Delayed Shifts after Rapid Acceleration
Owners sometimes notice a pause before the next gear is fully engaged, especially from 3rd to 4th or 4th to 5th.
Potential Causes: TCM logic balancing torque output, actuator solenoid gating, or friction plate glazing.
Maintenance Recommendations
Stick to recommended fluid intervals using the correct spec. Consider an upgraded transmission cooler if the car sees track or heavy performance use. Any persistent slip or harsh shift should prompt a thorough inspection, ensuring the torque converter and clutch packs remain intact.
Popular Cars with this Gearbox
Kia Stinger
Revealed in 2017, the Kia Stinger marked the brand’s entrance into the grand tourer/sports saloon category. It boasted rear-wheel drive (or AWD in some trims) and potent engine options, surprising many who never expected Kia to produce a performance-oriented car. UK driving enthusiasts appreciated its blend of power, comfort, and relative affordability compared to established German rivals. Production continued with minor updates in styling and tech.
Genesis G70
Hyundai’s luxury brand Genesis launched the G70 in international markets around 2017, targeting compact executive saloons like the BMW 3 Series. It arrived in the UK more recently, offering a premium interior, refined engines, and a generous warranty. Buyers seeking an alternative to established German rivals might choose the G70 for its value-oriented luxury and distinctive styling.
Is Your Vehicle Included?
Cars Using the 8-Speed RWD Auto (Kia Stinger, Genesis)
- Kia: Stinger (RWD versions)
- Genesis: G70, G80 (RWD trims)
Have a question?
Frequently asked questions
How much will it cost to repair my gearbox?
It’s difficult to provide a definitive answer without a proper diagnostic, as the cost of a gearbox repair can vary depending on several factors. The make and model of the car, as well as the type of gearbox, can significantly impact the cost.
If you’re experiencing issues with your gearbox, the best course of action is to contact one of our specialist team who will be able to provide you with an initial quotation.
What causes a gearbox to become faulty?
There are several factors that can contribute to a gearbox becoming faulty. Some of the most common causes include:
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Lack of maintenance: Regular maintenance, including changing the gearbox oil and replacing worn parts, can help prevent damage to the gearbox.
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Wear and tear: Over time, the gears and other components of the gearbox can become worn, leading to issues such as grinding or difficulty shifting.
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Overheating: Excessive heat can damage the gearbox and cause it to fail. This can be caused by a variety of factors, including driving at high speeds for extended periods or towing heavy loads.
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Contamination: Dirt, debris, or other contaminants can get into the gearbox and cause damage to the gears and bearings.
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Manufacturer defects: In some cases, the gearbox may have been manufactured with a defect that causes it to fail prematurely.
Can I still drive my car if the gearbox is acting strange?
It’s not recommended to continue driving your car if you’re experiencing problems with the gearbox. While you may be able to drive for a short time, ignoring the issue could result in more severe damage to the gearbox and other components of your vehicle.
Continuing to drive with a faulty gearbox could also turn a simple repair into a more complex and expensive one. In some cases, driving with a damaged gearbox could lead to complete gearbox failure, which could result in extensive damage and costly repairs.
If you’re experiencing issues with your gearbox, it’s important to have it diagnosed and repaired by a professional as soon as possible.
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