Information All Repair Shops Should Know About The Toyota A245E Automatic Transmission

Posted by on Wednesday, April 10th, 2013

The Toyota A245E  automatic transmission is built by Aisin-Warner for the Toyota Motor Company. It is a four speed trans-axle designed to be used in front wheel drive vehicles. The A245E is based on the A240E except that it is smaller in size and weighs less. It was used in production between 1993 and 2007, mainly in the Toyota Corolla. The Toyota Corolla is one of  Toyota’s most popular car models. If you own a repair shop, you are probably aware of this by the number of them that show up at your shop.  Let’s take a closer look at the A245E and some of the issues you might expect to come across with this transmission.

Your Toyota A245E automatic transmission


Electronic issues: The “E” at the end of A245E stands for electric. This transmission is loaded with electronic components that can sometimes be troublesome. Almost all electrical problems can be traced back to the electrical solenoids used in this transmission. A solenoid is an electrical mechanical device. It uses an electric magnet to move a valve. Inside the solenoid you will find a wire coil that makes up the magnet. When energized with electricity, the coil creates magnetism that moves a plunger attached to a valve. There is also a spring that is used to return the plunger to its starting position once the electrical flow is turned off. This moves the plunger and the valve back to its original position. The quickest way to check for a defective solenoid is to use an ohm meter. Connect the two leads from your ohm meter to the two wires coming off the solenoid. A normal reading is usually somewhere between 20 and 30 ohms. If you get no reading, the wire that makes up the magnet is broken. If you get a low reading, that means there is a short in the wire. Both faulty readings will require replacement of the solenoid. Also check to make sure something isn’t preventing the plunger from moving, such as debris or rust.

A great cut-away view of the A245E transmission


Overheating issues: As I’ve mentioned before, excessive heat is the number one killer of most automatic transmissions, and this is unfortunately the case for the A245E, too. You need to make sure the transmission stays under 200 degrees. Just a 20 degree rise in temperature will cut the life span of this transmission in half. A 40 degree rise will cut the life span to a ¼. A great recommendation from you to your customer would be to invest in an aftermarket transmission cooler and a transmission temperature gauge.  Both are fairly in expensive and are good insurance in preventing a transmission melt down from excessive heat.

Lack of maintenance: You can tell your customers until you are blue in the face that they must do timely schedules maintenance on their transmissions, but they probably won’t listen. You should educate them to the fact that the fluid can quickly turn to varnish under excessive heat, at which point it loses its ability to properly lubricate the transmission. The fluid also gets dirty over time. This dirt, if left too long, is old fluid and will accelerate the wear process in the transmission. Preventive maintenance to your customer’s transmission can save them money in the long run.

Internal components found in the Toyota A245E tranmission


When the time comes to replace your customer’s transmission, try your hardest to convince them to replace the worn out transmission with one that has been re-manufactured over one that was simply rebuilt. Re-manufactured transmissions usually come with much longer warranties and this fact should be a selling point. As a bonus to the shop installing it, if the transmission fails under the warranty period, most re-manufacturing companies will also cover the cost to R&R the transmission again. This is a big deal. With most rebuilt transmissions you are left footing the labor cost of the R&R, and that simply is not fair to you or your bottom line!


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