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18/04/2025

What do the different Toyota model letter acronyms mean?

CE Classic Edition
DX Deluxe
L Entry-level grade
LE Luxury Edition
S Sport
SE Sport Edition
SLE Sport Luxury Edition
SR Sport Rally
SR5 Sport Rally 5-Speed
VE Value Edition
XL Executive Luxury
XLE Executive Luxury Edition
XLS Executive Luxury Sport

21/02/2025

25/07/2024

15/11/2023

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*Bad or Failing Transmission Pump – Symptoms, Causes & Replacement*

A transmission pump is the heart of your vehicle’s transmission system, pumping transmission fluid to keep everything running smoothly. However, things can go pretty badly over time, and that can lead to serious issues for your car.
A bad transmission pump can give you some clear signs, such as a delayed response from your vehicle, strange noises coming from the transmission, difficulties with shifting gears, overheating of the transmission, and leaks of transmission fluid.

In this article, we will delve deeper into the world of transmission pumps. We’ll explore why they’re so important, what causes them to fail, and how to fix them.

What is a Transmission Pump?

A transmission pump is a mechanical device that is driven by the engine. When the engine starts, the pump begins to operate, circulating the transmission fluid around the system. There are three main types of transmission pumps used in vehicles: gear pumps, and vane pumps.

1. Gear pumps

Gear pumps are the most common type of pump used in automotive transmissions. They consist of two gears: one is connected to the engine (the drive gear), and the other is not (the driven gear).

When the engine runs, it rotates the drive gear, which in turn moves the driven gear. The space between the gears and the pump housing is filled with transmission fluid. As the gears rotate, they push the fluid out of the pump and into the transmission system.

2. Vane pumps
Vane pumps have a rotor with slots in which vanes or blades can slide. This rotor is positioned off-center in a circular cavity. When the engine drives the rotor, the centrifugal force pushes the vanes out against the cavity’s walls. As the rotor spins, the vanes trap pockets of transmission fluid and move it from the inlet to the outlet of the pump.

15/11/2023

*Bad or Failing Transmission Pump – Symptoms, Causes & Replacement*

A transmission pump is the heart of your vehicle’s transmission system, pumping transmission fluid to keep everything running smoothly. However, things can go pretty badly over time, and that can lead to serious issues for your car.
A bad transmission pump can give you some clear signs, such as a delayed response from your vehicle, strange noises coming from the transmission, difficulties with shifting gears, overheating of the transmission, and leaks of transmission fluid.

In this article, we will delve deeper into the world of transmission pumps. We’ll explore why they’re so important, what causes them to fail, and how to fix them.

What is a Transmission Pump?

A transmission pump is a mechanical device that is driven by the engine. When the engine starts, the pump begins to operate, circulating the transmission fluid around the system. There are three main types of transmission pumps used in vehicles: gear pumps, and vane pumps.

1. Gear pumps

Gear pumps are the most common type of pump used in automotive transmissions. They consist of two gears: one is connected to the engine (the drive gear), and the other is not (the driven gear).

When the engine runs, it rotates the drive gear, which in turn moves the driven gear. The space between the gears and the pump housing is filled with transmission fluid. As the gears rotate, they push the fluid out of the pump and into the transmission system.

2. Vane pumps
Vane pumps have a rotor with slots in which vanes or blades can slide. This rotor is positioned off-center in a circular cavity. When the engine drives the rotor, the centrifugal force pushes the vanes out against the cavity’s walls. As the rotor spins, the vanes trap pockets of transmission fluid and move it from the inlet to the outlet of the pump.

18/04/2023

SIGNS OF BAD AUTOMATIC TRANSMISSION VALVE BODY

The most common sign of a failing valve body is various types of gear changing problems. These shifting problems include incorrect shifting, improperly timed gear changes, or harsh gear changes. It could also cause transmission slippage.

When it comes to detecting faults in the valve body, many experts pointed out that it is not easy, since they are not initially intense. The symptoms begin to become more evident as the transmission heats up and the most common are:

KNOCKING NOISES

These occur when the gear change is made. The appearance of knocking noises is a symptom of a bad valve body that occurs when the vehicle speed is reduced, driving in reverse or changing gears.

If when slowing down, putting the reverse gear or changing the gear you hear knocks. These types of noises also indicate that the valve body isn’t in good condition.

SLOW WHEN CHANGING GEAR

Knocking sound is also a sign of bad valve body of automatic transmission

If we notice our car slowing down when entering reverse gear or when driving we notice the gear changes slowly, it is another sign that something is wrong with our automatic transmission system.

CHECK THE ENGINE LIGHT ON

If any of the above symptoms occur and the check engine warning light or malfunction indicator light illuminates, check to see if the vehicle has any car diagnostic code.

Since the transmission valve system is responsible for many transmission functions, various transmission-related trouble codes may appear. These are P0715, P0751, P0783, P0829 and P2707.

RPM INCREASES DURING THE SHIFT

If the transmission is working properly, the engine revs should drop between each gear change (for example, from third to fourth) to reach the top gear.

GEAR LEVER SLIPS

find difficulty in changing gears

If the lever slides more than necessary when changing gears, something is wrong with the valve body since this element ensures that this situation does not occur.

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