D 350 Pickup V8-360 5.9L VIN 5 (1992)
Transmission Cooler: All Technical Service Bulletins
A/T Cooler - Flow Test Procedure
NO.:
21-07-92
GROUP: Transmission
DATE:
Apr. 6, 1992
SUBJECT:
Automatic Transmission Failures/Lack Of Lubrication
MODELS:
1992
(AB) Ram Van/Wagon
(AD) Ram Pickup/Ram Cab & Chassis/Ramcharger
Power Ram Cab & Chassis
(AN) Dakota/Dakota Sport/Dakota Cab & Chassis
DISCUSSION:
A clogged or restricted automatic transmission oil cooler system(s) can be the cause of recurring transmission failures. Restriction of the transmission
fluid through the oil cooler system(s) can result in overheating of the fluid and reduce lubrication flow to the internal rotating parts of the transmission.
^
When diagnosing a automatic transmission failure, always determine what caused the failure as outlined in the appropriate service manual.
^
If a transmission fails due to transmission fluid starvation (lack of lubrication), inspect the transmission oil cooler lines for kinked/pinched lines.
Check for a restriction in the oil cooler(s) or lines, and repair or replace as necessary.
^
Outlined below, is the proper procedure for checking the transmission cooler fluid flow.
FLOW TEST PROCEDURE
1.
Disconnect the cooler return line from the transmission and place it in a one quart test container.
2.
Add one quart of Mopar ATF Plus (type 7176) transmission fluid to the transmission.
3.
Shift the transmission into neutral, start engine and run at curb idle for 20 seconds, while observing the fluid flow. If the flow is intermittent or it
takes longer than 20 seconds to collect one quart of ATF, the cooler(s) is restricted or the cooler lines are restricted and must be replaced or
repaired as necessary.
CAUTION:
DO NOT FLOW MORE THAN ONE (1) QUART OF ATF OR INTERNAL DAMAGE MAY OCCUR.
4.
If fluid flow is within the acceptable limits, connect the transmission cooler line to the transmission and fill it to the proper level.
POLICY:
Information only
Refer to appropriate Labor Operation Time Schedule for reimbursement.
