

Moreover, unlike its predecessor, the 4R100 is equipped with a dedicated output shaft speed sensor planted at the rear end of the transmission. This is why extra care must be exercised or taken to ensure comprehensive compatibility.

In addition, shoehorning the 4R100 into another vehicle will require extensive and expensive modifications. This is why both automatic transmissions do not apply to non-Ford vans and trucks. The 4R100 – and E4OD – were massive automatic transmissions measuring 27.25 inches long. You can even throw beefier tires on your heavy-duty vehicles and readily adjust your transmission settings to account for the larger diameters of these tires. Of course, truck owners want all shifts to be as seamless as possible. Using a hand-held tuner, the owner/user readily adjusts the line pressure, the firmness of the shifts, and the RPM at which the transmission shifts. It has a fluid capacity of 18 quarts Mercon V (complete with torque converter). (dry with converter), and every internal component is enclosed in an aluminum case. The 4R100 transmission weighs precisely 270lbs. The 4R100 is also a computer-controlled transmission that allows users to use hand-held controllers to modify the characteristics or attributes of the automatic transmission.

Then, in 1999, 4R100 was enhanced with a PTO (power take-off), which enabled auxiliary equipment to attach readily to heavy-duty vehicles with the transmission. Some issues became visible when this transmission was placed behind the Powerstroke Diesel Engine. The 4R100 shares excellent similarities to the E4OD however, several internal components were adjusted here and there to tackle every durability concern many truck drivers/owners raised. The E4OD was updated to the contemporary 4R100 transmission, which is the last rendition of the C6. Although this is a heavy-duty transmission, the addition of modifications by the owners became one of the weak aspects of the drivetrain.

The 4R100 transmission is rated at 1,000 ft./lbs, which means it is one of the strongest or toughest transmissions ever. These include big blocks (385 series, not FE), small blocks, modular bolts, and diesel patterns.
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The E4OD came with multiple bolt patterns, which made it incredibly popular for an upgrade or swap. The E4OD was established on core components of the C6 heavy-duty automatic transmission and was used extensively in several heavy-duty and light vehicles, including the F-150, F-350, F250, and the Bronco. The first electronically-controlled transmission from Ford was introduced in 1989 and named the E4OD (E = electronically controlled 4 = Forward Gears OD = OverDrive).
