A/T - Mandatory Oil Cooler Cleaning: Overview

Classification:
AT00-001b

Reference:
NTB00-056b

Date:
November 27, 2002

1988 AND LATER NISSAN VEHICLES AUTOMATIC TRANSMISSION OIL COOLER CLEANING

ATTENTION:
This bulletin supersedes NTB91-099, NTB93-007, NTB94-050, and NTB95-109B, and amends NTB00-056a. The applied models/model years and information in the Claims Information section of NTB00-056a was updated. Please discard all paper copies of NTB91-099, NTB93-007, NTB94-050, NTB95-109B, and earlier versions of NTB00-056.

APPLIED VEHICLES:
All 1988 and later with automatic transmission (including the Xtronic CVT automatic transmission)

SERVICE INFORMATION

Whenever an automatic transmission (A/T) is repaired, overhauled, or replaced, the A/T oil cooler mounted in the radiator must be inspected and cleaned.

^ Metal debris and friction material, if present, can become trapped in the A/T oil cooler and may build up as transmission fluid enters the Cooler Inlet.

^ This debris can contaminate the newly serviced transmission.

^ In severe cases this debris can block or restrict the flow of transmission fluid/oil. In either case, failure of the newly serviced A/T may result.

It will be necessary to back flush the cooler through the Cooler Outlet in order to flush out any built up debris.

^ The location of the cooler Inlet and Outlet hoses described in this bulletin determines direction of transmission fluid flow through the cooler.

^ The Inlet and Outlet position varies from model to model, and you must identify the location of the Cooler Inlet and Outlet to successfully perform the cleaning procedure.

Refer to the SERVICE PROCEDURE Workflow to determine the procedure for a particular vehicle.

^ Use Charts A and B in the service procedure to establish the correct Cooler Inlet and Outlet location for the vehicle you are servicing.

^ Then perform the Cleaning, Diagnosis, and Inspection as instructed.














MATERIAL SAFETY DATA SHEET





PARTS INFORMATION

CLAIMS INFORMATION





Use the "Combination" Op Codes as indicated with the appropriate Section "JA", "JC", or "JD" coding that best represents the A/T R&R and repair/replacement performed.