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LX Newbie
172 Posts
Discussion Starter · #1 ·
Has anyone experienced a clicking or knocking noise coming from the rear when starting from a dead stop? It sounds alot like my old 'Vette when the trailing arm bushings wore out. Thanks for any help.

What'd I miss?
23,444 Posts
TSB 21-014-05

FLASH: Clicking Sound From Rear of Vehicle After Accelerating From A Stop​
This bulletin involves selectively erasing and reprogramming the Powertrain Control
Module (PCM) with new software.​
2005 - 2006 (LX) 300/Magnum​
NOTE: This bulletin applies to 2006 vehicles equipped with a 3.5L engine (sales
code EGG) and a 42RLE transmission (sales code DG6) built on or before
July 29, 2005 (MDH 0729XX) and 2005 vehicles equipped with a 2.7L or 3.5L
engine (sales code EER or EGG) and a 42RLE transmission (sales code DG6).​
The new PCM software corrects a customer complaint of a click sound, coming from the
rear of the vehicle, immediately after accelerating the vehicle from a stop.
This sound may be verified by driving the vehicle and allowing the transmission to shift into
4th gear then allowing the vehicle to coastdown to a stop, without tipping into the
accelerator pedal before the complete stop. The sound will be heard immediately after
launching the vehicle and will seem to be coming from the rear of the vehicle.​
Using a Scan Tool (StarSCAN) with TechCONNECT and the appropriate Diagnostic
Procedures, verify all engine and transmission systems are functioning as designed. If
DTCs are present, record them on the repair order and repair as necessary before
proceeding further with this service bulletin.
If the vehicle operator experiences the Symptom/Condition perform the Repair Procedure.​

Demented and sad but social.
141 Posts
Mine did it told dealer once, they came back with loose articles in trunk area.Second time went in with copy of tsb all fixed now.
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