The conversion can be performed on the 79 Series Single or Dual Cab, the 76 Series Wagon or the 78 Series Troopie.
Engine RPM drops to a quiet 1851rpm at 100kph on highway use with 33” tyres. That’s around 600rpm less for pre-Oct 2016 vehicles, and approximately 200rpm less for later models. Increase the tyre size and RPM is even less.
The extra RPM is completely unnecessary, the 4.5Li V8 turbo intercooled engine has loads of power and torque, even for heavy towing, so the extra fuel useage and noise is completely unnecessary.
Those extra RPM make a huge difference to engine life. Driving at 110kms/hr with 285/75/16” tyres, the RPM is 2414 for the H150f gearbox which is fitted to the pre-dpf models. The DPF models have a taller 5th gear, the comparative RPM is 2017.
That would save 1.5 million engine revolutions on a trip to the Kimberley and back.
However the ZF 8 speed automatic conversion reduces the RPM even further, saving approximately 3.4 million revolutions on just the one trip to the Kimberley and back.
The ZF 8 speed auto is fitted from factory to a large number of vehicles worldwide. These include Jeep Grand Cherokee, Jeep Gladiator, RAM 1500, 2500, 3500, Range Rover, Discovery, and many cars like Audi, Bentley, RollS Royce, Jaguar, Maserati, Porsche Cayenne and many many more!
The ZF transmission is rated to 1000nm torque at the crankshaft, so it’s completely compatible for vehicles with power upgrades.
For extreme power upgrades, a stronger upgraded ZF 8HP is available.
Like all modern automatic transmissions, the ZF 8HP used to convert the 70 Series to automatic has its own computerised management system (Transmission Control Unit: TCU), which is fully programable to the application.