There, a technician will inspect the transmission and replace it with a new one that is not impacted by the electric oil pump quality deviation where necessary, at no cost to the owner. Owners will be reached out to by first-class mail starting on December 9 and asked to return their vehicle to the dealer. Fortunately, neither it nor Kia are aware of any crashes or injuries related to the defect. That will, ultimately, result in a loss of motive power, which could lead to an increased risk of a crash.Īs of September 26, 2022, Hyundai was aware of 229 unique incidents between June 2021 and that date. The car will play audible chimes and a message to “stop safely immediately” on the instrument cluster.Īnd the warning is legit, because drivers will be given just 20-30 seconds of normal driving before the transmission enters a failsafe mode and disengages the drive gears. The fault could result in a diagnostic trouble code, which would warn the driver of the impending issue. Specifically, a component within the pump’s circuit board may not have been soldered sufficiently, and could detach. We think that’s still got a decent speed advantage,” says Marcus Waite, chief engineer of the McLaren Senna.īut for just about every other vehicle, though, it's hard to argue that anything can do the job better than the ZF eight-speed.The problem stems from the electric oil pump within the eight-speed dual clutch transmission, which may experience an internal fault due to a supplier quality deviation issue. “For our kind of product, it’s about a really fast shift, which the pre-engagement element of a dual-clutch gearbox helps us with. And engineers maintain that a good dual-clutch ’box does shift quicker. The added length of a torque converter can be prohibitive in a mid-engine architecture, and precise launch-control programs provide an advantage in acceleration. Now it is starting to look like the transmission of the past,” he tells us. “Ten years ago, still looked like the transmission of the future. That’s also the opinion of Andy Palmer, CEO of Aston Martin, who claims ZF’s 8HP is lighter, cheaper, and quicker than a dual-clutch transmission. Has the dual-clutch transmission met its match, then? You might think that’s the case, given the recent defections by the Audi RS5 and the BMW M5, which switched from dual-clutch transmissions to ZF’s 8HP torque-converter automatics. “We keep the same power flow through all of those applications, so we can carry over the calibrations, the software, all of those tools that keep that transmission shifting smoothly,” says Eric Burnett, chief engineer for eight-speed, rear-wheel-drive transmissions at Fiat Chrysler. And the commonalities among all 8HP gearboxes allow companies to share core elements between vehicles as different as the Dodge Demon and the Ram 1500, minimizing development costs. The ability to swap the torque converter for an electric motor, as BMW has done, allows automakers to develop hybrid variants with minimal changes to the drivetrain. It is compatible with a variety of all- and four-wheel-drive systems, such as an integrated center differential or a two-speed transfer case. It can accommodate a maximum torque output from as low as 162 pound-feet up to 770. 21 watchers Sponsored 2012-2017 BMW F10 M5 F06 F12 F13 M6 4.4L V8 DCT 7-SPEED TRANSMISSION OEM 179241 Pre-Owned 2,300.00 hondaparts-hub (84) 100 Buy It Now +300.00 shipping Sponsored 2008 Bmw 7 Speed Dct Transmission Low Miles Good Condition Pre-Owned 875. Beyond performance, the eight-speed’s appeal is rooted in its versatile modular design. In 2017, some 3.5 million 8HP transmissions were built for a laundry list of manufacturers that includes Aston Martin, BMW, Fiat Chrysler, Jaguar Land Rover, and the Volkswagen Group. The 8HP transmission comes only in longitudinal form for rear- or all-wheel-drive vehicles, and we prefer it immensely to ZF's transverse alternative, a nine-speed. The 8HP also executes certain multigear shifts in this manner witness the leaps from sixth gear to third and even eighth to second. All one-gear and two-gear shifts use just two shifting elements: one opens, another closes. They’re also a product of a fundamental design that determines how the four planetary gearsets, three clutches, and two brakes in every 8HP gearbox are parsed into eight forward ratios. The 8HP transmission from German supplier ZF is quick enough to serve sports cars and graceful enough for large luxury sedans, and it combines those elements of speed and smoothness whether it’s installed in an Aston Martin, a Rolls-Royce, or a Jeep.Īlbert Dick, vice president of car powertrain technology at ZF, says the 8HP’s deeply satisfying shifts are rooted in factors ranging from the quality of the solenoids to the manufacturing methods to the control software.
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