DIY repair ford explorer

Do-it-yourself Ford engine bulkhead - detailed photo report

I continue to restore the Ford Explorer.
Now I got to the engine.
Went through the box, went through the transfer case, differential.
Oil smudges were visible on the engine, but a red emulsion from antifreeze came out through all the gaskets.

The car was in the garage for 3 years and did not start for about a year since I decided to change the machine to mechanics. I put it in the garage due to a broken box.

I changed the oil in the engine, box.
The reverse gear is missing.

Before that, the exhaust manifold was very hot and there was a loss of power. As I later found out, the candle wire was cut off. Gasoline was burnt in the manifold.

I thought not to touch the engine. But still I decided to change the gaskets. Rem. a set of gaskets and bolts was purchased in advance through Ibei.

Photo report on disassembly, it may be useful for someone to put everything back together.

The automobile concern Ford is one of the oldest and most successful in the world. It is to the Ford plant that the world owes the first developments in the field of planetary hydraulic automatic transmissions. Ford strives to produce reliable, comfortable cars that can compete with any car manufacturer. Ford automatic transmissions are simple and reliable.

Car Ford Focus Sedan

The Ford Focus is equipped with a unique 4f27e four-speed transmission. The uniqueness of Focus with 4f27e automatic transmission is that it is the only popular transmission that can be completely repaired without removing it from the car. This simple and reliable transmission is still in production today.

At first, Focus with automatic transmission 4f27e does not require anything other than changing the oil and filters. But already in the first years on the Focus with 4f27e, the main problems begin to appear. The first to focus on the 4f27e are the reverse clutches and the overdrive mode. On Mazda cars with the same boxes, manufacturers very quickly switched to reinforced clutches, which can also be ordered for the Ford Focus with 4f27e. Rapid burnout of clutches on Focus with 4f27e is associated with the design of the box and cannot be cured. It's all to blame for the drum seat on the Focus with 4f27e, it wears out too quickly and oil starts leaking from the back cover. Its wear occurs with increased side loads and aggressive driving, the automatic transmission electronics are very fond of overloading this unit. With oil starvation, the clutches begin to slip and burn.

Video (click to play).

Automatic transmission control unit 4f27e

A common problem with the Ford Focus automatic transmission is the rear cover. When the first vibrations appear when driving a Ford Focus, you should watch it and change it if necessary. After the clutches on the Ford Focus burn out, the drums will also start burning. Together with the drums, the pistons should be replaced immediately.

The brake band on a Ford Focus can be considered a consumable item. If it is not changed in time, the car will be left without second and fourth gears. The problem can be solved by ordering a reinforced tape.

With frequent overheating of the box on the Ford Focus, the overdrive mode servo fails.

Teflon o-rings for the oil pump and rear cover are another fun part of this automatic transmission and are sold separately. They can be changed simultaneously with the oil change, they are so “good”. Fortunately, this procedure on a Ford Focus is very simple and there is no need to dismantle the box. More relevant for Mazda vehicles than Ford Focus. If the rings on the Ford Focus are not changed, the oil will start to drain and the lack of pressure will kill the box very quickly, starting, as a rule, with reverse gear and overdrive mode. If you just add oil, then the cover or drum will have to be changed.

The electrical part of this automatic transmission is very reliable.Once every 150,000-20,000, it is necessary to rinse and clean the valve body and change its sealing elements. On the same run, along with this operation, it is worth changing the pressure solenoid and the switching solenoid. They work harder and deplete their resources faster.

On the mechanical part, one of the differentials is often grinded. After serious runs, in most cases, all plastic and rubber elements fail. The oil pump and bearings fail somewhat less frequently. The condition of the iron (gears, planetary gear, and so on) is highly dependent on the oil and operating conditions. If the owner did not like to change oils and liked to press on the gas, then, most likely, there are enough broken places in the box. In general, the box is very simple and maintainable.

CD4E automatic transmission was installed on Ford Escape and Mondeo cars. The reliable, simple and unpretentious four-speed automatic transmission quickly became a hit for engines up to 3 liters.

The electrical part of the Escape and Mondeo automatic transmission control unit is very reliable. The only thing that needs to be replaced during the overhaul of the Escape and Mondeo automatic transmissions is a set of solenoids and a speed sensor.

CD4E automatic transmission for Ford Mondeo and Escape

Over time, their resistance increases, they become clogged with dirt, leading to abnormal operation of the Escape and Mondeo automatic transmissions.

The mechanical part is also very reliable. During a major overhaul, the clutch drums and steel discs are replaced. The first symptom of their failure on the Escape and Mondeo automatic transmissions is the loss of dynamics when the car accelerates.

If one or more mechanisms inside the Escape and Mondeo automatic transmission box fail and the oil becomes clogged with metal or plastic particles, the oil pump may fail

The disappearance of the fourth and second gear knobs on the Escape and Mondeo automatic transmissions when switching the selector lever is a symptom of damage to the brake band. At high mileage and poor condition of the box, increased pressure or vibration occurs inside it, which leads to the destruction of the brake band.

If the overdrive selector mode disappears on the Escape and Mondeo automatic transmissions, this is due to the destruction of the retaining ring.

One of the advantages of the Escape and Mondeo automatic transmissions is that the Ford automatic transmission can be repaired on a lift without dismantling the automatic transmission.

If the car drives for a long time with a worn out brake band, reverse gear may also fail.

Pistons and their rubber construction are a classic problem. Rubber loses its properties over time and ceases to hold pressure.

The planetary row of forward speeds is a weak point in the design of this box. The safety margin does not correspond to the power of the engines and, if driven frequently before the cut-off, the bearings may break. If they break, then their remains are carried by oil through the mechanisms of the box and cause severe damage to it.

The same picture can be obtained if the bearings are operating in oil starvation mode.

Torque converters in this automatic transmission are not the most reliable and quickly deplete their resource, they really do not like operation in case of overheating and lack of oil.

The 5R55N automatic transmission has been used for real powerful American cars: jeeps and full-size powerful sedans like the Ford Explorer, for example.

Gaskets, oil seals and seals are changed at the time of the overhaul of the automatic transmission Explorer.

Brake band of the overdrive mode of the automatic transmission Explorer does not like distortions and vibrations, usually when they fail, they change the bands for reverse gear.

Ford Explorer with automatic transmission 5R55N

For the electrical part of the automatic transmission Explorer - a solenoid block and a speed sensor. They work in a more loaded mode and fail faster.

The automatic transmission oil pump Explorer has a very weak valve, which is better to change to an analog from the Sonnax company.

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In America, a frequent repair is the rebuilding of the torque converter. For them, special repair kits are produced.Torque converter failure is typical most often associated with its slip modes and aggressive driving style. On cars with this automatic transmission, it is recommended to install an additional radiator.

Ford Fiesta is equipped with a six-speed automatic transmission Powershift. Powershift is a new generation of transmission that provides economical fuel consumption. Powershift automatic transmissions are 9% more efficient than electro-hydraulic transmissions and are lighter in weight. The Powershift design consists of two separate transmissions, one responsible for shifting the even gears, the other the odd ones. The Powershift scheme is somewhat reminiscent of a manual transmission with a dry clutch, but the computer controls the shifting, manual shifting, possibly using a selector.

Powershift has the same negative points as robotic transmissions. They translate into vibrations and hard gear changes when driving aggressively.

Powershift automatic transmission for Ford Fiesta cars

Powershift is a new development and its breakdowns and childhood illnesses have not yet been studied enough. Poor factory firmware of the Powershift control unit greatly reduces driving comfort and quickly destroys the transmission mechanisms. Europe has already solved this problem with an upgraded firmware, but it has not yet reached Russia. So far, Powershift suffers from fast release bearings and oil seals coming out of the stand.

Most modern Ford automatic transmissions are maintenance-free. However, the oil and filter on such boxes still need to be changed. It is not in the rules of Russian motorists to buy a new car every three years. With a timely oil change and compliance with the operating rules of automatic transmissions, Fords live for a very long time and need major repairs after 200,000-250,000 kilometers. It is not possible for a motorist to carry out overhaul operations in Mnevniki without appropriate knowledge and experience, so it is better to entrust it to professionals.