TSB - A/T - Converter Shudder On Vehicles With Less Than 4K Mi - JKowners.com : Jeep Wrangler JK Forum
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post #1 of 1 Old 08-19-2009, 12:23 PM Thread Starter
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Exclamation TSB - A/T - Converter Shudder On Vehicles With Less Than 4K Mi

2009 Jeep Truck Wrangler 4WD V6-3.8L
Vehicle: All Technical Service Bulletins
A/T - Converter Shudder On Vehicles With Less Than 4K Mi
NUMBER: 21-022-08
GROUP: Transmission
DATE: October 8, 2009
Torque Convertor Shudder On Vehicles With Less Then 4000 Miles
This bulletin involves using the StarSCAN(R) to verify that the "Torque Converter Break In" option is disabled (status = false).
2009 (DS) Ram Truck
2009 (HB) Durango
2009 (JK) Wrangler
2009 (KA) Nitro
2009 (KA) Nitro (International Markets)
2009 (K1) Cherokee (CKD)
2009 (KK) Liberty
2009 (KK) Liberty (International Markets)
2009 (LC) Challenger
2009 (LE) 300C/300 Touring (International Markets)
2009 (L2) 300 (China)
2009 (LX) 300/Magnum/Charger
2009 (ND) Dakota
This Bulletin applies to DS/JK/LX/LE/LC/HB/KA/KK/K1 and ND models equipped with a 42 RLE transmission (Sales Code DGV) built before
September 29, 2008 (0929XX MDH) or L2 models built with a 42 RLE transmission (Sales Code DGV) built before October 10, 2008 (1010XX
Some customers may experience a shudder condition within the first 4000 miles. This shudder happens during steady state driving with the torque
convertor in partial lock while the transmission is still in torque converter break in mode.
The shudder feels like the vehicle is being driven over rumble strips.
Using a Scan Tool (StarSCAN(R)) with the appropriate Diagnostic Procedures available in TechCONNECT, verify all engine and transmission Systems
are functioning as designed. If DTC's are present record them on the repair order and repair as necessary before proceeding further with this bulletin.
If the above symptom/condition is experienced or can be verified, perform the Repair Procedure.

1. Using the StarSCAN(R) select PCM.
2. Read DTC from the PCM.
3. Are any PCM DTC present?
a. No >>> proceed to Step # 4
b. Yes >>> Repair DTC as necessary then proceed to Step # 4
4. Select the "Misc Functions Menu" on the StarSCAN(R).
5. Select the "TCC Break In" option.
6. Select "Start" and the select "Next"
7. Select "View Current TCC Break-In Status"
8. Is the "Torque Converter Break In Complete status False?
a. Yes >>> Using the StarSCAN(R) disable "Torque Converter Break-In"
b. No >>> This bulletin does not apply, further diagnosis is required.

Reimbursable within the provisions of the warranty.

This bulletin is supplied as technical information only and is not an authorization for repair.
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