A/T - Cooler/Line Flushing Information
Retailer Technical Journal 19495
Automatic transmission
cooler/lines flushing
1982 Volvo 240 L4-2127cc 2.1L SOHC B21F Copyright ? 2013, ALLDATA 10.52SS Page 92
Date 09-11-2009
Reference: VIDA, VSTG, RTJ 16724
Note!
If using a printed copy of this Retailer Technical Journal, first check for the latest online version.
NOTE!
THIS RTJ SUPERSEDES THE PREVIOUS VERSION OF RTJ 19495 RELEASED 10-8-2008. A LABOR OPERATION HAS BEEN
REMOVED. THE DESCRIPTION OF BURNT OIL HAS BEEN EDITED. PLEASE UPDATE YOUR FILES.
AFFECTED VEHICLES:
DESCRIPTION:
The purpose of this RTJ is to work as a guideline for technicians when an automatic transmission is being replaced. In order for modern automatic
transmissions to properly adapt to transmission wear while maintaining comfortable shift quality, the pressure control is closely monitored. For this
reason, the automatic transmission fluid (ATF) must meet the transmission manufacturer's specifications.
A faulty transmission often has debris in the ATF, the coolers, the lines, and throughout the transmission. This debris must be properly flushed out
before a new transmission is installed. Flushing the ATF using the transmission oil pump of the newly installed transmission will not suffice and
can possibly cause damage to the new unit. Depending on the condition of the ATF, the transmission coolers and lines may need to be replaced.
The information below is copied directly from VIDA.
SERVICE:
Once a transmission is properly diagnosed to be faulty and needs to be replaced, it is important that the proper procedures are followed for flushing
out the used ATF from the ATF coolers and lines. Note that some vehicles have two coolers; the cooler in the side of the radiator and the auxiliary
cooler.
When an automatic transmission is replaced, follow VIDA to reset adaptive memory. Simply disconnecting the TCM (Transmission Control
Module) or power from the TCM does not reset adaptive memory!
On all vehicles, always flush the radiator, coolers, and lines before installing the new transmission. The guidelines and procedures for flushing vary
with each model.
There is a procedure for flushing coolers and lines found in a hyperlink in the VIDA transmission/gearbox installation procedure called
Transmission, preparations before installing for AW (Aisin Warner) 5- and 6- speed automatics and in the VIDA transmission replacement
procedure for the AW 4-speed automatic.
The guidelines for flushing coolers on a GM 4T65 4-speed automatic are in VIDA/Information/Repair/Transmission, removing and there is a
hyperlink in VIDA/Information/Repair/Transmission, installing for a flushing procedure called Oil cooler, flush cleaning. The guidelines for the
1999-2005 S80 will be updated to match the XC90.
More details about these guidelines can be found below.
On a GM 4T65 (2003-2005 XC90 T6 and 1999-2005 580 6-cyl), if there is:
^ glycol in the transmission fluid (refer to RTJ 16724 for more information on checking for glycol contamination), this would indicate an internal
leak in the radiator requiring complete replacement of the ATF cooling system (radiator, auxiliary cooler [if applicable*], and cooler lines).
1982 Volvo 240 L4-2127cc 2.1L SOHC B21F Copyright ? 2013, ALLDATA 10.52SS Page 93
^ metal in the transmission fluid, this would indicate an internal transmission problem. Note! Metal in the ATF is nearly impossible to flush out
completely. In order to be rid of all metal particles, complete replacement of the ATF cooling system (radiator, auxiliary cooler [if applicable*],
and cooler lines) is required. See photo.
^ fine black sediment in the pan or on the pan magnet, this is normal. This can be flushed out according to VIDA. See photo.
^ dirty oil or burnt oil, this would indicate friction component (band or clutch disc) breakdown and in order to be sure all of the debris is out of
the ATF cooling system, complete replacement of the ATF cooling system (radiator, auxiliary cooler [if applicable*], and cooler lines) is
required. See photo.
*Note! All 2003-2005 XC90 T6 vehicles have an auxiliary automatic transmission fluid cooler.
Labor operation code 49115 should be used when the ATF cooling system is flushed, not replaced.
WARRANTY CLAIM INFORMATION
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