A/T - Hard Shift During Light Throttle

90mazda06 Category

K
Applicable Model/s 1988-89 626/MX-6 Turbo
Subject Dl-D2 SHIFT SHOCK
Bulletin No. 003/90
Issued 4/20/90
Revised
DESCRIPTION

If you encounter a customer complaint regarding DI to D2 shift shock during light throttle (1/4 opening) during warm-up, repair the problem in accordance with the following procedure.

NOTE:
Perform the repair procedure referring to the Workshop Manual for details.


REPAIR PROCEDURE

1. Conduct a test drive and confirm the customer's complaint.

2. Check that the line pressure is within 4.0-4.6 kg/cm (57-66 psi) at idle (725-775 rpm) in "P" range at normal operating temperature.

If the line pressure is out of the specification, adjust the line pressure by adjusting the lock nuts of the throttle cable.



3. Verify that the throttle cable is free of "slack" in accordance with the following procedure.

a) Read the line pressure (a) indicated on the pressure gauge (P/N 49B0 19 901).

b) Disconnect the throttle cable from the throttle cam and read the line pressure (b).



^ If the value of the line pressure (a) is higher than (b), the result is OK.

^ If the line pressure does not change, go back to step 2 and readjust the throttle cable.
NOTE:
When the throttle cable has "slack", the line pressure does not increase in proportion to the engine torque, causing DI to D2 shift shock.

4. After adjusting the line pressure (throttle cable), be sure to verify the condition of shift shock by road testing.

If the result is still unacceptable, proceed to the next step.

5. Replace the valve body with one for the 1990 model (P/N FU3H 21 100A).


WARRANTY INFORMATION

1. When Repair Prodedure steps 1 - 4 were conducted:

Warranty Type Code: A
Customer Comment Code: 26
Damage Code: 9H
Part No. of Main Cause: FU32 21 600B
Operation No: XX0355-R-X
Labor Hours: 0.8 Hr.

2. When Repair Prodedure steps 1 - 5 were conducted:

Warranty Type Code: A
Customer Comment Code: 26
Damage Code: 9N
Part No. of Main Cause: FU3H 21 100A
Quantity: 01
Operation No: K0306B-R-X 1.8 Hrs.
XX0355-R-X 0.8 Hrs.

IMPORTANT:

This bulletin is a revision of Service Bulletin Category 7, no. 070/89. Please reference this bulletin when using your 1989 Service Bulletin file.