Transmission not shifting properly

Hi,

Often times, this is related to the wrong type of transmission fluid being used. Has anyone added or changed the fluid recently? Also, is the fluid clean and full?

The transmission fluid for this vehicle is ATF-Z1

Here are the directions for servicing the transmission. At the end, it explains how to check fluid level. The attached pics correlate with the directions.

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2004 Honda Accord L4-2.4L
ATF Replacement
Vehicle Maintenance Fluids Fluid - A/T Service and Repair Removal and Replacement ATF Replacement
ATF REPLACEMENT
ATF Replacement

NOTE: Keep all foreign particles out of the transmission.

1. Bring the transmission up to normal operating temperature (the radiator fan comes on).
2. Park the vehicle on level ground, and turn the engine off.

Pic 1

pic 2

Note: Use a 3/8 drive ratchet for the drain plug.

3. Remove the drain plug (A), and drain the automatic transmission fluid (ATF). Then reinstall the drain plug with a new sealing washer (B).

NOTE: If a cooler cleaner is going to be used, refer to ATF cooler cleaning.

Pic 3

4. Remove the dipstick, and refill transmission with the recommended fluid amount through the opening of the dipstick guide pipe until the level reaches the upper mark on the dipstick. Always use Honda ATF DW-1 (ATF-Z1 has been replaced with ATF DW-1, Honda Service News Nov 2010) automatic transmission fluid (ATF). Using a non-Honda ATF can affect shift quality.

Pic 4

5. Insert the dipstick (A) into the dipstick guide pipe aligning the cap (B) with the guide tab (C).

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Let me know what you find.

Joe

Hi,

Have you checked for diagnostic trouble codes? The vehicle has a transmission control module which may indicate the issue. You will need to scan the can system. CAN stands for controller area network. It ties all the modules and computers together. Here is a video showing how it's done:

https://youtu.be/InIlnsjOVFA

Let me know if you have had this done.

Joe

Hi,

The VSS (vehicle speed sensor) can certainly cause a shift issue. I realize you read the codes, but did you do it with a scan tool that can read other than engine codes?

Let me know.
Joe