Transmission not shifting properly

Hi:
When the power-train control module (PCM) senses an abnormality in the input or output system, the D indicator in the gauge assembly will usually blink.

Now, have you checked the transmission fluid to make sure it is clean and full? There is a dipstick to check. Do it when the engine is warm and off.

What I suspect is either there is an issue with the input or output speed sensor. What you need is to have the computer scanned. Often times a parts store will do it for free. However, often times the parts stores will not have a scanner that can read transmission codes. Regardless, I would try that first. If they are unsuccessful, then you will need to have a shop check it for codes.

Once you get the codes, let me know what they are so I can point you in the right direction.

Take care,
Joe

Hi:

You have a bad shift solenoid. It's stuck on which is causing the issue. Look at the descriptions below.
'
DTC P0757: Shift Solenoid Valve B Stuck ON

P0780 means there is one or more A/T DTCs stored.

DTC P1730: Problem in Shift Control System:
Shift Solenoid Valves A or D Stuck OFF
Shift Solenoid Valve B Stuck ON
Shift Valves A, B, or D Stuck

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Shift solenoid B is in the transmission. Here are the directions for replacement. The attached pics correlate with the directions.

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2006 Honda Truck CR-V 4WD L4-2.4L
Removal and Replacement
Vehicle Powertrain Management Transmission Control Systems Actuators and Solenoids - Transmission and Drivetrain Actuators and Solenoids - A/T Shift Solenoid Service and Repair Removal and Replacement
REMOVAL AND REPLACEMENT
Shift Solenoid Valve Replacement
1. Make sure you have the anti-theft code for the radio, then write down the customer's audio presets.
2. Remove the splash shield.

Pic 1

3. Remove the drain plug (A), and drain the automatic transmission fluid (ATF). Then reinstall the drain plug with a new sealing washer (B).
4. Disconnect the battery negative terminal, then disconnect the battery positive terminal.
5. Remove the battery hold-down bracket, then remove the battery cover, battery, and battery tray.
6. Remove the battery base.
7. Place the transmission jack under the transmission, and lift it up to create clearance between the transmission and front subframe.
8. Disconnect the shift solenoid harness connector.

Pic 2

9. Remove the bolt (A) securing the bracket (B) of the ATF cooler inlet line (C) on the shift solenoid valve cover (D), and remove the line bolt (E) and sealing washers (F).
10. Remove the shift solenoid valve cover, dowel pins (G), and gasket (H).

Pic 3

11. Disconnect the shift solenoid valve connectors, remove the solenoid mounting bolts, then hold the solenoid valve body and remove the shift valves. Do not hold the connector to remove the shift solenoid valve.
12. Install the new O-rings (two O-rings per solenoid valve) (F) on the reused solenoid valve.

NOTE: A new solenoid valve comes with new O-rings. If you install a new solenoid valve, use the 0rings provided on it.

13. Install the shift solenoid valves C, D, and E. While holding the shift solenoid valve body, be sure to install the solenoid valves until their mounting brackets contact the servo body.
14. Install the shift solenoid valves A and B. While holding the shift solenoid valve body, be sure to install the solenoid valves until their mounting brackets contact the bracket of the installed solenoid. Install the solenoid mounting bolts (H) and tighten them.

NOTE: Do not install the solenoid valves A and B before installing the shift solenoid valves D and E. If solenoid valves A and B are installed before solenoid valves D and E, it may damage the hydraulic control system.

15. Connect the shift solenoid valve D connector (G) with the ATF temperature sensor.
16. Connect the solenoid valve A connector (BLU wire), solenoid valve B connector (ORN wire), solenoid valve C connector (GRN wire), and solenoid valve E connector (RED wire).
17. Install the shift solenoid valve cover, dowel pins and a new gasket.
18. Install the ATF cooler inlet line with the line bolt and the new sealing washers. Create clearance with the jack between the transmission and the front subframe to tighten the line bolt to the specified torque with the torque wrench.
19. Secure the ATF cooler line bracket on the shift solenoid valve cover with the bolt.
20. Check the connector for rust, dirt, or oil, then connect the connector securely.
21. Remove the transmission jack.
22. Refill the transmission with ATF.
23. Install the battery base, battery tray, and battery, then secure the battery with its hold-down bracket.
24. Connect the battery terminals.
25. Install the splash shield.
26. Enter the anti-theft code for the radio, then enter the customer's audio presets.
27. Do the power window control unit reset procedure.
28. Set the clock.

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Let me know if this helps.

Joe