A/T - A4LD Erratic or No 3-4 Upshift

SIL 88-12 (Mar)

SUBJECT: FORD A4LD

PROBLEM:
Erratic or no 3-4 upshift, or 4-3 downshift on transmissions with a 3-4 shift solenoid. To identify a transmission with the 3-4 shift solenoid, check the wires that plug into the case connector. Transmissions with the 3-4 shift solenoid have three wires instead of two.

CAUSE:
May be caused by normal levels of contamination in the transmission fluid. This causes the 3-4 shift solenoid to stick in the open, or closed position. The 3-4 shift solenoid is external of the transmission filter which makes it sensitive to normal levels of transmission fluid contamination.

CORRECTION:
To correct this, install a new 3-4 shift solenoid and sleeve/screen assembly. The sleeve/screen assembly will protect the new 3-4 shift solenoid from contamination. Both components are contained in service kit E8TZ-7M107-A.

PART NUMBER PART NAME CLASS

E8TZ-7M107-A Service Kit 3-4 Solenoid and C
Sleeve/Screen Assembly

NOTE
ALWAYS INSTALL THE SLEEVE/SCREEN ASSEMBLY PROVIDED IN THE SERVICE KIT WHENEVER REPLACING THE 3-4 SHIFT SOLENOID.

FAILURE TO DO THIS MAY CAUSE A REPEAT FAILURE.