In the Ford Ranger , I believe that was ( 1985 ) with the A4LD
using overdrive will use less fuel as it is another gear to lower your rev's Overdrive is a crusing gear to get better fuel efficiency at the price or torque
All automatic transmissions have a PUMP in the front of them right behind the torque converter. Transmissions are designed to cool off by using transmission lines running from the transmission to the VEHICLE Radiator to cool the transmission fluid.
bad filter and fluid,bad front pump,or the overdrive is going out common problem when using overdrive in the city limits meant for the highway start and always stoping not good to be in overdrive cant stress enough here at the house until she spent $3770.00 dollars dont have to tell her anymore
The first fully automatic transmission was introduced by Oldsmobile in their 1939 model year. It was called the Hydra-matic.
No, automatic transmissions may shift faster than a manual transmission because it takes a lot of skill to race and change gears using a manual with a clutch, however, the manual transmission allows you to decide exactly when to shift for more speed at the times you need it and for better engine performance when done by a skilled, practiced, professional racer.
Overdrive just lets the car use the lowest gear. Without overdrive you are probably only using 3 gears, and with it you are probably using 4.
Type F transmission fluid was formulated specifically for Ford automatic transmissions, primarily the C4 and C6 transmissions that were used in the 1960s through the 1980s. At some point, Ford switched from using Type F to the newer Dextron III formulation.
As far as light duty (Class 1 - 4) trucks go, just General Motors. Ford uses their own transmissions, and Dodge uses the Aisin transmission. If you look into medium- and heavy duty trucks, several manufacturers have the Allison automatic transmissions as an option (for example, you can get them with the Ford F650 and F750), but these are quite different from the transmissions used in GM light duty pickups.
In most cases for an automatic transmission the fluid must be added through the dipstick tube. Using a small funnel makes thes job a lot easier. Most modern transmissions are 'sealed for life'. They should not need fluid.
I was looking at the ( 2001 ) Ford Explorer Sport Trac Owner Guide and it shows there is an ( O/D OFF ) light in your gauge cluster when the ( overdrive ) is switched off by using the switch on the end of your automatic transmission gear selector
One of the main drawbacks of using Japanese engines and transmissions are the mounts they use. Often these will cause vibration of the chassis which can cause damage to the car.
USE OVERDRIVE WHEN NOT TOWING , TURN IT OFF IF YOU ARE TOWING OR PULLING A LARGE LOAD