Transmission Jacks

What you need to know about Transmission Jacks


Transmission Jacks are used for safely removing components from an already lifted & supported vehicle, most commonly gearboxes (otherwise known as transmissions). They are operated manually, by pumping an attached handle. This pressurises the hydraulic fluid contained within the Jack, supplying the lifting force to raise & lower vehicular components. Before work can begin on a gearbox, it should be safely lowered to the ground or securely attached to an Engine Stand, as they are not designed to support weight over a long period.

As they are not intended for lifting entire vehicles, the tonnage ratings of Transmission Jacks are accordingly much lower than those for Trolley & Bottle Jacks, varying between 0.15 & 1.5 tons. A very wide, concave saddle cradles components as they are removed, & chains are often included to keep them in place & to prevent tipping. As gearboxes are irregularly shaped & difficult to remove, you should ideally look for a model with an adjustable or tiltable saddle so the component can be eased into place as smoothly as possible. Most Transmission jacks have a long, vertical lifting shaft; lower ground clearance models are available which use either a scissoring mechanism or a laterally folding support.


Maintaining your Transmission Jack


The Hydraulic Jack Oil of your Transmission Jack will need to be topped up regularly. A Transmission Jack which is not fully topped up will not be able to extend fully, & will be able to lift less weight than its advertised rating, with the potential for a disastrous failure during use. It is imperative that you never substitute Hydraulic Jack Oil for Brake Oil, or any other form of Oil. You should always inspect your Transmission Jack for signs of leakage or corrosion before using it to lift heavy objects.


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