CODE 51 XX -- OFFGOING RATIO TEST DURING SHIFT (TIE-UP TEST)

WTEC III ELECTRONIC CONTROLS TROUBLESHOOTING MANUAL

CODE 51 XX -- OFFGOING RATIO TEST DURING SHIFT (TIE-UP TEST)

3. If the offgoing clutch stays pressurized, drain the fluid, remove the control module, disassemble

the control module and clean it, inspecting for damaged valve body gaskets and stuck or sticky

valves. Inspect the transmission for signs of clutch damage indicating the need to remove and

overhaul the transmission.

4. If the problem has not been isolated, replace the solenoid for the offgoing clutch.

5. If after replacing the solenoid the problem persists, install another ECU. If this corrects the prob-

lem, temporarily reinstall the old ECU to verify the repair.

6. If this does not correct the problem, reinstall the original ECU and check for mechanical problems.

The clutch may be mechanically held (coned, burned and welded, etc.). It may be necessary to re-

move the transmission and repair or rebuild as required.

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