19/11/2013
Vers. 1.1
7
4.3.
Purpose
This manual aims to guide the industry operators in a valid and affirmed procedure of oil replacement for automatic
transmissions: this allows the cleaning of the entire lubricating circuit and a complete removal of the used oil from
the system.
Replacing the lubricant for this type of change is critical and the high incidence of failures for this rather delicate
part proves it.
Despite this, many manufacturers indicate the need for this operation for increasing mileage, or even, in some
cases, overlook this need for the entire life cycle of the car.
The following picture shows the conditions of the sump of an automatic transmission with a covered distance of
about 37000 Km.
Despite the not at all excessive distance covered by the car, it is clearly visible how a substantial amount of sludge
and emery has been formed.
Experience proves, therefore, that it is good practice to perform a periodical replacement, by which it is possible to
smooth the driving with less jerks when gears are engaged and, at the same time, increase the life of the
transmission itself.
The improvement in driving comfort following the process described below is immediately perceived by the driver,
who will be surely satisfied with the work done.
That's why we recommend not to underestimate the importance of regular oil replacement in an automatic
transmission.
Figure 3 - Example of sump after 37,000 Km
