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Automatic transmission fluid (ATF) turns chocolate brown or mud-like

Automatic transmission fluid (ATF) turns chocolate brown or mud-like

Automatic transmissions are very delicate part of automobiles. They ought to be handled with care and good maintenance culture. 
One of the practices that kill automatic transmissions is the use of incompatible automatic transmission fluid in them. 
Automatic transmission fluids transform in different ways depending on the cause, ranging from age, overuse, water intrusion into the transmission, transmission overheat, clutch wear, incorrect fluid and so on. .. 
The one we shall discuss here is quite uncommon and that is automatic transmission fluid looking like chocolate or mud. 
We are going to be using a case study; a 2010 model Toyota camry hybrid. 
Before we assessed this vehicle, the code that the vehicle was diagnosed to have..

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How to clean cooling  system that is contaminated with engine oil or transmission oil

How to clean cooling system that is contaminated with engine oil or transmission oil

A very frustrating situation can arise where either the engine oil or automatic transmission fluid finds its way into the cooling system and mixes with the coolant solution.
This can happen through the following;

Leaking cylinder head gasket
Cracked cylinder head
Faulty engine oil cooler
Faulty transmission oil cooler
Human error (pouring engine oil into the coolant reservoir or expansion tank) 

Removing oil from the cooling system can be a very difficult task to accomplish and it is one that requires a lot of patience and perseverance. 
Luckily, commonly available dishwashers are very effective for getting rid of oil from the cooling system.
Before starting this cleaning process, ensure that the cause of the coolant and oil mixing is al..

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How a poorly maintained cooling system can damage a car's transmission

How a poorly maintained cooling system can damage a car's transmission

There are some cars that have transmission heat exchangers attached to the bottom of the radiator. Mineral deposits as a result of prolonged use of water can go settle at the water passage side of the oil cooler and block it. You will then have only ATF circulating but not water and hence no heat exchange. This is the beginning of the end of such transmission.
As the transmission will be overheating especially during high ambient temperatures, sporty or high speed driving.
This is because there would no longer be heat transfer from the transmission fluid to the coolant.
The transmission overheats, oil gets burned, clutches wear out, solenoids overheat and gets damaged, electrical wires resistances increase and so on.
This can be prevented by ensuring that the cooling system mai..

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How to drive a manual transmission vehicle to save fuel

How to drive a manual transmission vehicle to save fuel

Manual transmissions are suppose to be more fuel efficient. From observations, for some, reverse is the case due to poor driving skill. Some drivers are guilty of gear overuse on normal driving conditions. Like keeping it on first gear for more than necessary.
- Smart use of coasting and idling on motion is a good way to save fuel with manual transmission.
- Early gear upshifts and overdrive use that is skillfully done can save fuel.
- On descents, you may start off with second gear.
- Unnecessary depression of clutch pedal should be avoided. Simply engage the appropriate gear for that speed so that when braking, the car can coast rather than idle.
- Do not rest your left foot on the clutch pedal while driving.
- Do not over fill the manual transmission fluid during maint..

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