VIBRATION/SHUDDER - UNDER LIGHT ACCELERATION ABOVE 56 KM/H (35 MPH) IN 3RD OR 4TH GEAR
TRANSMISSION - AODE/4R70W - SHUDDER/VIBRATION UNDER LIGHT ACCELERATION ABOVE 56 KM/H (35 MPH) IN 3RD OR 4TH GEAR
Publication Date: NOVEMBER 20, 1995
1992-1995 CROWN VICTORIA 1994-1995 MUSTANG, THUNDERBIRD
1992-1995 GRAND MARQUIS, TOWN CAR 1993-1995 MARK VIII 1994-1995 COUGAR
1994-1995 ECONOLINE, F-150
This TSB article is being republished in its entirety to clarify Issue, Action, Service Procedure, and Operation.
Torque converter clutch shudder or vibration may occur under light to moderate acceleration above 56 km/h (35 mph) while in 3rd or 4th gear or during 3-4 or 4-3 shifts. This condition may be noticeable on higher mileage vehicles (24,000 km/15,000 mi or more) when the torque converter clutch engages or disengages during light to moderate acceleration.
Perform normal diagnostics (i.e., linkage adjustment, fluid level and condition, On-Board diagnostic check). If self test codes are present, service as required. If no DTCs are present, perform the following Service Procedure.
Drain all transmission fluid. Refer to the appropriate Service Manual, Section 07-01 for details. If fluid is burnt or heavily contaminated, repair as required.
Remove transmission and replace the torque converter assembly with the correct torque converter. Refer to Figure 1.
Figure 1 - Article 95-23-4
Remove the transmission pan and clean transmission pan and pan magnet.
Inspect transmission pan gasket and filter. Reuse both pan gasket and filter if not damaged.
Reinstall filter, pan magnet, and transmission pan with original gasket.
Completely clean and flush transmission cooler and cooler lines.
Reinstall the transmission assembly.
Refill transmission with Mercon® Automatic Transmission Fluid (XT-2-QDX). Use only quart containers of Mercon® when refilling to ensure proper fluid quality is being used.
Mercon® Automatic Transmission Fluid
Please use the following repair description for each model described in the OPERATION/DESCRIPTION/TIME section of this TSB article:
Perform electronic transmission diagnostics, replace torque converter, drain and fill transmission (including inspection of filter - replace if necessary), flush cooler and lines. Road test vehicle after repairs are complete.
OTHER APPLICABLE ARTICLES:
Eligible Under The Provisions Of Bumper To Bumper Warranty Coverage