Automatic transmission dpo al4 DIY repair

In detail: automatic transmission dpo al4 do-it-yourself repair from a real master for the site my.housecope.com.

Image - Automatic transmission dpo al4 DIY repair

It should be said that before driving, you should warm up ANY machine, do not “tear” until the car is fully warmed up. The DP0, AL4 automatic device is assisted in this by a special thermostat, it is both mechanical and electrical, depending on the years of manufacture.

In this material, we will try to consider one of the ways to solve the problem of automatic transmission shocks, transition to emergency mode and other delights such as pressure spread.

I would like to repeat and reiterate that it is NORMAL for this box (after all, this is a development since the 80s, it is simply constantly being modernized)

  1. Light tremors in AL4 are acceptable! This is truly a design feature of the AL4. There are parts in the automatic transmission that have excessive inertia;
  2. Check engine mountings! Before dealing with jolts, be sure to check the condition of the engine mountings. If the pillows are worn out - of course, replace;
  3. Attention to the level and properties of the oil in the machine! Every 20 thousand runs, check the oil level or make a partial oil change. Partial replacement is done without disassembling the machine, in five minutes, 4 liters. Replacing and checking the level should only be done by competent specialists, since the correct oil level in AL4 is set according to the regulations for half a page;
  4. The planetary of this box is extremely reliable, in my practice I have never seen a DP0 with dead gears.

• Drain the automatic transmission oil.
• Disconnect the battery.
• Place a container for collection for subsequent disposal. Drain everything.

Image - Automatic transmission dpo al4 DIY repair

Image - Automatic transmission dpo al4 DIY repair

• Disconnect the connectors of the electromagnetic secant (sequential) valves by carefully lifting them with a screwdriver;
• Disconnect 6 solenoid secant valves;
• Remove 7 screws (3).

Video (click to play).

Image - Automatic transmission dpo al4 DIY repair

Old manufacturer ACUTEX, new Borg Warner.
The main differences, the new solenoid valve has a black connector and is held together by 4 clips, the old one is a white connector and is held together with a knurled bezel. Outwardly - everything, inside it is also slightly modified, the main differences in the valve operating frequency: ACUTEX - 50Hrz, Borg Warner - 100Hrz.

Image - Automatic transmission dpo al4 DIY repair

• When replacing the valves with a new sample, they must be activated through the Peugeot Planet 2000. Old software versions of AL4 computers are not compatible with new EMC!
• EMC for a new sample are replaced by PARNO!

• After removing the valve body, flush all valves (top and side);

• Unscrew 8 torxes, remove, wash. Under the lid there will be a small filter and an electrovalve-modulator, remove it, wash it.

Image - Automatic transmission dpo al4 DIY repair

• Putting it up in the reverse order.

3. Reinstalling the valve body

• Before installing GB, service box recommends replacing these two rubber bands;

Image - Automatic transmission dpo al4 DIY repair

• Be careful not to get the wiring under the valve body, otherwise it can be damaged and you will have a short circuit to the body.

ATTENTION: Make sure the mechanical valve (6) fits into the shoulder (A) of the toothed sector (16).

Image - Automatic transmission dpo al4 DIY repair

• We put in place, otherwise the gears will not change, again carefully we check that the wires are inside;

Image - Automatic transmission dpo al4 DIY repair

• Refit the fixing bolt of the hydraulic unit (Tightening torque 0.8 da.Nm) Follow the sequence shown;
• Connect 6 secant solenoid valves;
• Ensure correct operation of the gear change mechanism in all positions. To do this, connect the battery, turn the key to the first position, press on the brake and see if all gears are turned on correctly;

Install:
• Crankcase (2) with a new gasket;
• Crankcase mounting bolt (1) (Tightening torque 1.0 da.Nm);
• Air filter sleeve.

4. Fill in oil, check the level

After assembly, fill in new oil. Mobil ATF LT 71141 (earlier they were released under the esso and total brands, but total was bought by mobile).

• Fill in oil, 4.5 liters. Bring the automatic transmission oil temperature to 58-68 degrees. (Usually turning on the first fan speed or using the Peugept Planet 2000);
• With the engine running: Remove the level plug (6 edges, 19 mm each).

If the oil flows out in a thin stream and then drips, the level is correct.

• Oil flows out in the form of drops, and then stops flowing;
• Switch off the engine;
• Allow to cool;
• Add 0.5 liters of oil;
• Start the procedure over again;
• Periodically replace the sealing gasket of the drain plug;
• Tighten the plug (Tightening torque 2.4 da.Nm).

Image - Automatic transmission dpo al4 DIY repair

Memo:
Filled oil volume:
- after draining the oil - 3.5-4 liters.;
- after draining the fluid and replacing the hydraulic block - 4-4.5 liters.;

1. The valve body, the second screw from the right, for a hexagon, regulates the pressure. My pressure rose by one full revolution by 0.3 (in case the pressure does not rise after flushing). The optimal pressure is considered to be 3 bars at XX in D, in fact, it can be in the range of 2.55-3.0, this is normal, but 2.55 is the lowest threshold! After rinsing, you can half turn tighten up… During the operation (that way five years) the spring got hooked a little. If you still do not have enough to reach the required pressure, then simply drain the oil again, remove the valve body cover and, without removing the valve body itself, tighten it again. But this SHOULD be done very carefully! Because there are a lot of complaints, I want to WARN you IN ADVANCE, if you twist it, then twist it by a quarter, or even less. The reason is trivial, twist more, there will be a large pressure, the standard pressure at XX is 2.8-3 bars, can you imagine what will happen to the box when 6.0 bars are wound? Better not to know!

As you can see, basically only one valve wears out. Photo 2.

Disassembled valve. So the valve does not need to be disassembled just to be removed, rinsed and swapped. It is recommended to replace the O-ring art. 2578.13 Photo 1.

Read also:  DIY Lancer 9 repair

Image - Automatic transmission dpo al4 DIY repair

The location of the temperature sensor, if this dachik is not working properly, then the automatic transmission can also get into emergency mode. Changes with the scythe.2529 26 (but it's better to look at the wine).

Image - Automatic transmission dpo al4 DIY repair

Swap valve 2, consisting of an o-ring (B) and valve (2), art. 2574.16

Image - Automatic transmission dpo al4 DIY repair

Renault analog 77 01 208 174, the rest of the valves under number (A) are removed one at a time, washed, cleaned and replaced (so everything is in turn). Do not touch the rest of the adjusting screws.

Image - Automatic transmission dpo al4 DIY repair

If you buy a new one, you change the EVM pressure control valve.

Image - Automatic transmission dpo al4 DIY repair

As it turned out, this GB is not only a problem with two valves, but also the rods themselves, in some places they are simply not tight. In order to fix this, the European supplier to the conveyors of automotive giants and the manufacturer of parts, SONNAX, made a repair kit, one BUT, it can be delivered in high-precision technology, because boring of several channels and replacement of standard pushers with more advanced and sealed ones will be done.

How to remove the valve body - video

Repair of automatic transmission DP0 (video)