Torque Converter Clutch - Chuggle/Hunting Condition

FILE IN SECTION: 7 - Transmission

BULLETIN NO.: 57-71-09

DATE: April, 1995

SUBJECT:
Torque Converter Clutch (TCC) Chuggle/Hunting Condition (Install Time Delay Module Kit)

MODELS:
1989-95 Geo Tracker
with Hydra-matic 3L30 Automatic Transmission

CONDITION
Some owners may experience a Torque Converter Clutch (TCC) chuggle/hunting condition.

TCC Chuggle/Hunting occurs with the vehicle at normal operating temperature, in 3rd gear, at approximately 40-45 mph on a level road on a slight grade (mostly occurring when driving uphill), the engine speed at approximately 2500-2700 rpm and with the throttle opening at approximately 10-50 percent. Under these conditions, rapid, repeated apply/release of the converter clutch may cause a bucking or jerking sensation.

CAUSE
This concern is due to governor pressure switch instability when the vehicle speed is constant at TCC apply.

CORRECTION
Install the time delay module kit into the TCC relay circuit to address the TCC chuggle/hunting condition.

SERVICE INFORMATION
When servicing a transmission for a TCC chuggle/hunting condition, install the time delay module kit to resolve this condition.

TCC Apply Time Delay Module Installation Instructions:




1. Disconnect the battery. (Figure 2)

2. Disconnect the green connector of the TCC relay. (Figure 2)




3. Disconnect the white wire from the green connector. Remove the terminal carefully with a narrow screwdriver as indicated. (Figure 1)




4. Connect the white wire to the time delay module (Figure 4) and connect the red wire from the time delay module in place of the white wire to the connector body of the TCC relay. (Figure 4)

5. Reconnect the green connector to the TCC relay and install the TOO relay onto the relay center.




6. Clip the time delay module onto the A/C fan relay. (Figure 3)

Important:
If the vehicle is not equipped with air conditioning, install the rubber connector from the kit onto the fuse box tab and then clip the time delay module onto the rubber connector.

PARTS INFORMATION

Part Number Description

96041311 Kit, Time Delay Module
Includes: Time Delay Module Rubber Connector
Instruction Sheet

Parts are currently available from GMSPO.

WARRANTY INFORMATION
For vehicles repaired under warranty, use:

Labor Operation Labor Time

K6108 0.2 Hr.