01j 325 031 Details
New CVT Automatic Transmission Valve Body For A udi A4 A6 A8 OEM:01J325031CD 01J 325 031 CD
Kindly Reminder:Please check the part number or send us VIN // Chassis number when you buy it.
Part Number: 01J325031CD 01J 325 031 CD
Fitment: Audi A4 A6 A8
Symptoms of a Bad Transmission Valve Body
A transmission valve body is a major component of an automatic transmission. It’s essentially a maze-like control center made up of valves, passageways, and solenoids that diverts transmission fluid to where it’s needed for gear changes.
hile not a common part to fail, when you do have some type of malfunction in the transmission valve body, it’s not a simple fix. Your options are either to replace or rebuild it.
Here is how an auto trans valve body works along with common signs and symptoms you may experience when a transmission valve body is bad.
All 01j 325 031 automatic transmission systems have a valve body which serves as the “brain” of the transmission.
There are dozens of various passages and channels within the valve body which direct the flow of pressurized hydraulic fluid to different valves in order to activate the right clutch pack or band and shift to the most appropriate gear based on the current driving situation.
Think of each channel as a tumbler on a lock which has to perfectly line up so transmission fluid is directed where it should.
The valves that make up the valve body each serve a different purpose and their names reflect what they do. For example, the valve body has a 2-3 shift valve which is responsible for up shifting from 2nd gear to 3rd gear.
And if there’s going to be a downshift from 4th gear to 3rd gear, then the 4-3 shift valve would be responsible for that.
Types of Valve Body
There are two main types of valve body. The first type is the electronic valve body which uses the electronic system ECT (electronic controlled transmission) as its main control to operate all shifting on an automatic transmission.
Many 01j 325 031 newer cars use this electronically controlled transmission (ECT) which has bands and clutches that are operated via hydraulics.
However, an electric solenoid valve is used to control each hydraulic circuit. This is what allows the transmission to have more elaborate and advanced control schemes than non-electronically controlled transmissions.
The controller of the transmission can monitor the throttle position, vehicle speed, anti-lock braking system, and the engine speed.
The other type of valve body is called the hydraulic valve body. This system works by using hydraulic pressure to control each valve that’s linked to the shifting lever.
When you change the handle’s position, it will uncover and cover certain passages in the valve body to accommodate that position. So, if you were to change the gear lever to “Drive,” then fluid would be directed into the clutch and 1st gear would be activated.
One of the most common signs you have a problem with your transmission valve body is a delay (2 or more seconds) or harsh shift when shifting from Park to Drive or Park to Reverse. These are commonly referred to as “garage shifts”.
If you have a problem with only one scenario (example: Park –> Reverse), try to limit the amount of times you’re in that situation even if it means backing into the garage or a parking space each time.
While driving, you may notice that your transmission is shifting into a higher or lower gear at the wrong time.
For instance, you may be going up a hill and even though you want the transmission to shift down to give you more power, it instead shifts into a higher gear making the drive up the hill much more difficult.
In addition, you could be driving a steady 60 MPH on a level highway and your transmission sporadically shifts into either a higher or lower gear for no reason. Any type of erratic shifting can be a symptom of a bad transmission valve body.
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