What are the steps for disassembling and assembling an automatic transmission?

2 Answers
VonBrayden
07/24/25 8:09am
Steps for disassembling and assembling an automatic transmission: 1. Remove the front and rear housings, oil pan, and valve body of the automatic transmission, then remove the oil pump assembly; 2. Disassemble the planetary gear transmission, and clean the disassembled parts with gasoline; 3. During installation, follow the reverse order of the disassembly steps. An automatic transmission is a device that can automatically shift gears without manual intervention, offering advantages such as smooth shifting and ease of driving. It is one of the most widely used types of transmissions in the world today. There are four common types of automotive automatic transmissions: Hydraulic Automatic Transmission (AT), Continuously Variable Transmission (CVT), Automated Manual Transmission (AMT), and Dual-Clutch Transmission (DCT).
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VanLucas
08/11/25 3:48am
The process of removing an automatic transmission is quite complex, and I've participated in it a few times. First, ensure safety by disconnecting the negative battery terminal to avoid any electrical sparks or short circuits. Then, lift the vehicle to an appropriate height and secure it with stands to prevent it from falling and causing injury. Next, remove the drive shaft and all electrical connections, including sensors and cooling lines. Remember to drain the transmission fluid into a container to avoid making a mess. After removing the mounting bolts, you must use a professional engine support to stabilize the engine, carefully sliding the transmission away from the flywheel and torque converter. For installation, reverse the steps, but be careful to align the input shaft correctly to avoid damaging the gears. It's recommended to have the entire process handled by a professional repair shop, as they have specialized tools and experience to prevent oil leaks or misalignment. Finally, add new fluid and test to ensure smooth operation. Never attempt this yourself to save time—the risks are too great.
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