Dodge Sprinter. Manual - part 558
Symptom:
TRANSMISSION SLIPPING
When Monitored and Set Condition:
TRANSMISSION SLIPPING
When Monitored:
Engine rpm greater than 450 rpm, output speed greater than 180 rpm,
no N2 - N3 input speed sensor errors present, no gear selector lever errors present, no ABS
system errors, no transfer case errors present, and all wheel speeds between 70 - 380 rpm
with no wheel slip detected. Set Condition: Calculated ratio not within allowable range for
the engaged gear. No shifting operation.
Set Condition:
The TCM constantly calculates the transmission ratio based on the N2 -
N3 input speed signals and the calculated output shaft speed (CAN message from the
ABS). The TCM will detect if the transmission is slipping or an invalid gear ratio is present
POSSIBLE CAUSES
OTHER DTCS PRESENT
AXLE - MECHANICAL - GEAR RATIO
INTERNAL TRANSMISSION
TCM - TRANSMISSION SLIPPING
TEST
ACTION
APPLICABILITY
1
NOTE: Low fluid level can be the cause of many transmission problems. If
the fluid level is low locate and repair the leak then check and adjust the
fluid level per the service information.
NOTE: Always perform diagnostics with a fully charged battery to avoid
false symptoms.
With the DRBIII
t, read the engine DTCs. Check and repair all engine DTCs prior to
performing transmission symptom diagnostics.
With the DRBIII
t, read and record all Transmission DTCs.
NOTE: Check connectors - Clean/repair as necessary. Poor pin to terminal
connections can set DTCs.
Using the wiring diagram/schematic as a guide, inspect the wiring and connectors.
Repair as necessary.
Most DTCs set on start up but some must be set by driving the vehicle such that all
diagnostic monitors have run.
Note: Verify flash level of transmission controller. Some problems are
corrected by software upgrades to the transmission controller.
NOTE: Check for any Technical Service Bulletins that may apply.
Perform this procedure prior to Symptom diagnosis.
All
Continue
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TRANSMISSION - NAG1