At IAA 2025, ZF introduces the versatile 8HP evo transmission, supporting a broad spectrum of hybrid applications and driving forward the shift towards electrified vehicles with innovative, scalable technology.
At the IAA 2025, ZF revealed an updated version of their 8HP evo automatic transmission — specifically designed to meet the rapidly growing worldwide demand for hybrid powertrains. Building upon the success of their well-regarded 8-speed transmission, the 8HP evo incorporates a variety of technological improvements aimed at supporting a broad range of hybrid applications and accommodating different manufacturer needs. The company sees this transmission as a key tool in pushing forward the electrification of future vehicle generations, which aligns with the forecasted annual hybrid market growth of around 10 percent through 2032, primarily driven by markets in the US and Asia-Pacific regions.
What really sets the 8HP evo apart is its flexible, modular architecture — capable of spanning the entire hybrid drive spectrum. From 48-volt mild hybrids (MHEV) to full hybrids (HEV) operating on a 400-volt platform, and even plug-in hybrids (PHEV). This wide compatibility makes it quite unique in the marketplace. Mathias Miedreich, a member of ZF’s Executive Board overseeing Electrified Drive Technology, noted that OEMs are on the lookout for fast, scalable solutions that can be adapted to various hybrid configurations. The design philosophy behind the 8HP evo is perfectly aligned with these demands, offering a good mix of range, efficiency, and durability, all while keeping costs down by simplifying components and trimming weight.
On the engineering side, the transmission now features a lighter, less complicated setup with fewer parts than before. Alongside these mechanical upgrades, electric motors, power electronics, and other mechanical parts have been improved to extend electric-only driving range. The latest processor technology supports more advanced software functionalities, and the control software architecture has been reworked to make integration smoother for vehicle makers. Interestingly enough, in plug-in hybrid versions, the 8HP evo has increased peak electric output from 160 kW to 200 kW, and torque from 500 Nm to 600 Nm. Reports also indicate that input shaft losses have been cut by around 28 percent — which in turn means more electric driving range for the same battery capacity, a huge plus given the current efforts to reduce dependence on rare earth materials, which can be both heavy and expensive. This plays into the overall sustainability goals as well.
This latest evolution stems directly from ZF’s innovations on the SELECT platform — a modular, scalable electrified drivetrain solution — which has influenced the design of the 8HP evo. Dr. Otmar Scharrer, head of Electrified Drive Technologies at ZF, pointed out that its modular setup allows it to serve a broad spectrum of vehicles in a cost-effective manner, from mid-range to luxury models. It’s also worth noting that this approach aligns with the increasing popularity of full hybrids, especially in the US market where many consumers favor vehicles that can operate purely on electricity without needing external charging infrastructure. The 8HP evo addresses this trend by enabling the vehicle to recharge its battery during driving, mainly through energy recovery, thus expanding hybrid usage scenarios.
Alongside the 8HP evo, ZF has kicked off production of its fourth-generation 8-speed automatic transmission, called the 8HP Gen4, at the Saarbrücken plant. This addition broadens their passenger car lineup to include mild hybrids, PHEVs, and traditional combustion engines. The new transmission showcases ZF’s ability to deliver high power density and better efficiency, with some PHEV models reaching electric-only ranges over 120 km — though of course, this depends on the specific vehicle and battery setup. It also features integrated power electronics within the transmission housing, helping streamline installation and cut weight by roughly 6.5 kg compared to earlier versions. These improvements address both performance and packaging challenges faced by OEMs.
In the commercial vehicle sector, ZF is also ramping up production for its PowerLine 8-speed automatic transmission, made at the Gray Court, South Carolina plant. Designed to meet the needs of trucks in Classes 5-8, this transmission promises about a 10% jump in fuel efficiency and shifts that are approximately 30% faster than the older 6-speed automated units. Since 2021, they’ve invested around $200 million into modernizing this facility to boost production capacity. The modular design of the PowerLine also makes it easier to integrate in hybrid trucks, supporting ZF's broader e-mobility push within commercial fleets.
Their electrification efforts extend beyond just passenger cars and trucks. For example, at IAA Transportation 2024, ZF introduced the TraXon 2 Hybrid transmission system tailored for heavy-duty commercial vehicles, highlighting their readiness to help reduce CO2 emissions while staying in line with regional decarbonization policies. By combining high-power hybrid modules with the proven TraXon 2 platform, they’ve optimized fuel savings and vehicle range. They’re also partnering with companies like Foton in China to localize production and deployment of these hybrid systems, with plans to commence manufacturing there by 2026, before gradually expanding globally.
All in all, ZF continues to emphasize the importance of hybrid systems as a flexible, practical step toward full electrification. Their investments in cutting-edge transmission tech and scalable electrified platforms showcase a strong commitment to supporting the evolving automotive market—both for passenger vehicles and commercial fleets—during this period of rapid change in powertrain development.
Source: Noah Wire Services