ZF Automatic Transmission Oil Pan Filter Kit and 6 Liters of ZF Transmission Fluid Lifeguard 6 - Replacement for BMW 7. 8hp70 transmission pan. ZF 8HP45 / Chrysler 845RE Technical information (and the HP70) Variants of ZF eight-speed automatic include an AWD version and one with a built in 20-horsepower electric motor for a parallel hybrid setup. Advantages of the transmission are not so much the eight speeds, which keep the engine in its optimal range, but.
It debuted in 2008 on the BMW 7 Series 760Li sedan that featured the mighty V12 engine. Since then, all new BMW models with rear or all-wheel-drive can be equipped with this transmission and updated versions are used by many manufacturers such as Volkswagen, Audi, Bentley, Rolls-Royce, Aston Martin, Dodge or Lamborghini.
Its revolutionary design revealed an entirely new gear set concept with four gearsets that require only five shift elements, of which only two are open in any given gear.
The longitudinal gearbox uses three multi-disc clutches, two brakes, and a new parallel-axis vane-type oil pump that enables it to be far more efficient than other automatic transmissions, with drag losses being significantly reduced due to this layout.
The dimensions have remained unchanged from the highly successful six-speed transmission it replaced, even though it has two extra gears. Moreover, weight was reduced by around 3%, making the initial 8HP70 modular system weigh just 87 kg (192 lbs.), including transmission oil.
FCA US LLC started to use this transmission on their vehicles as well, and by 2013, in order to reduce costs, they reached a supply and license agreement with ZF and started production of the transmission in the U.S. market it under the Torqueflite 8 moniker, which is used by the likes of the Dodge Challenger or Jeep Grand Cherokee SRT Trackhawk.
The second generation of this gearbox was released in 2014 and further maximized efficiency, with ZF claiming a 3% reduction in fuel consumption over the first generation.
Improvements included a wider gear ratio spread of 7.8:1, reduced drag torque from the shift elements, reduction in the oil pump pressure, and extended compatibility with coasting and start-stop systems.
Four years later, the third generation of the 8HP was introduced, this time fuel consumption was reduced by an additional 2.5% and the gear ratio spread was modified to 8.6. It featured several maximum torque versions, and for the first time, it was compatible with 48v hybrid power units, incorporating boosting and recuperation capabilities.
The fourth generation is set to be released soon and it will be ZFâs most versatile transmission, being compatible with traditional combustion engines and hybrid units.
it is equipped with an improved, highly powerful motor that further improves fuel efficiency reduces emissions even more compared to traditional transmissions and elevates the overall performance of the gearbox.
This transmission will be used in a variety of rear-wheel and all-wheel-drive vehicles, from regular, midsize to high-performance cars, SUVs, and off-road trucks due to its multiple versions that can handle engine torques that range from 300 to 1000 Newton meters.
It is a worthy alternative to dual-clutch transmissions due to its low cost, durability, and modular architecture that makes it easy to fit on a wide range of vehicles.
Ram 8hp70 Transmission Reviews
For the 8-speed automatic transmission, ZF set out to design and develop an entirely new gear set concept. The result is a revolution in transmission design: a transmission concept with 4 gearsets which requires only 5 shift elements â of which only two are open in any given gear. The 8HP also requires no more than 3 multi-disk clutches and 2 brakes, which allows it to achieve a greater degree of efficiency than other concepts. As a result of the fact that only 2 shift elements are open per gear, drag losses in the transmission are sustainably reduced. This effect is supported by the use of a new parallel-axis vane-type oil pump. 4 A torque range from 300 to 1000 newton meter makes the 8HP the perfect partner for all rear-wheel-drive and all-wheel-drive designs. From the lower midsize segment to sporty luxury cars, and in every type of SUV and offroad vehicle â its revolutionary design is always an efficient and economical solution. Although the 8HP features 2 more speeds than the extremely successful 6HP, the dimensions have remained unchanged and the weight was even reduced by 3% to 87 kg (transmission modular system 8HP70) including oil. At the same time, the total transmission ratio spread of 7.0 ensures that the engine is always in its optimum operating range. This translates into improved acceleration and reduced fuel consumption.
Zf 8hp70 Problems
Based on a really successful product, it combines dynamics and comfort with improved efficiency â also with regard to the costs. And it is ideally equipped for even stricter fuel consumption and CO2 emission regulations. In the premium and mid-size car range, the optimized 8HP product family enables the average fuel consumption to be cut by another 3%. CO2 emissions decrease to the same extent. These potentials can also be completely transferred to hybrid drives. Incidentally, additional savings potential by a further optimized startstop function is not yet included here. To achieve these innovations, ZF engineers have optimized some details. Thus, the reduction of drag torques and engine speeds further reduced the already very low power losses. Essential success aspects are the higher transmission ratio spread and the reduction of system pressures in many areas. Another factor is the multidisk separation of the brakes. Furthermore, advanced torsional vibration dampers enable a faster bypassing of the hydrodynamic power transmission and therefore further reduction in speed. Thus, the new 8HP is perfectly prepared for use with the new engines (3-8 cylinders) which will determine the trend of the years-to-come.