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post #16 of (permalink) Old 10-24-2012, 10:39 PM Thread Starter
Join Date: Oct 2012
Posts: 34
Re: Outlook transmission: bad wave plate or bad customer service

Why is the wave plate issue not a recall? There are dozens of posts on this forum alone. Visit the Acadia, Traverse, and Enclave forums and you will see many more posts about this issue. Add to that the dozens of forums that I have visited these past weeks which have similar posts. What does it take for a recall to occur? Below is one such post regarding a TSB (Technical Service Bulletin) of this very well known problem that cuts across all GM brands:

I just found a bulletin on this issue that sounds exactly like your problem, the trans issue is related to an internal clutch wave plate that breaks. The repair is to take the trans out and apart for repair.

While I realize that this is not good news, it at least verifies that the issue is not computer related so you at least know what you are paying for is indeed necessary.

here is the bulletin info...


Bulletin No.: 09-07-30-012A

Date: January 12, 2010

Subject: No Reverse, 3rd or 5th, Check Engine Light Illuminated, DTC P0776 (Replace 3-5 Reverse Clutch Plate (Waved)

2008-2009 Buick Enclave
2008-2009 Chevrolet Equinox, Malibu
2009 Chevrolet Traverse
2007-2009 GMC Acadia
2007-2009 Pontiac G6
2008-2009 Pontiac Torrent
2007-2009 Saturn AURA, OUTLOOK
2008-2009 Saturn VUE
All Equipped with 6T70/75 6-Speed Automatic Transmission (RPOs MH2, MH4, MH6 or MY9)

This bulletin is being revised to update the information. Please discard Corporate Bulletin Number 09-07-30-012 (Section 07 - Transmission/Transaxle).


Some customers may comment about an SES light and/or no reverse and may also comment on a slip / flare or harsh shifts in drive range 3rd and/or 5th gear. Upon investigation, the technician may find DTC P0776 (Clutch Pressure Control (PC) Solenoid 2 - Stuck Off) set. Any one of the following codes may set independent of each other as a result of this wave plate breaking: P0777, P2723, P0717, P0716, P2715, P2714.


This condition may be caused by a broken 35R clutch wave plate allowing the apply piston to over-stroke, causing the piston to leak and causing loss of apply. This normally will not occur before approximately 32,000 km (20,000 mi). Debris generated by the condition can affect the operation of the speed sensors and other clutches.


It is recommended that a new plate be installed any time the transmission is disassembled for any reason.

The Control Solenoid (w/body and TCM) Valve Assembly should not be washed in a parts cleaner.

Read more: 60 mph, engine reved momentarily then dropped..slowed..20 mph - JustAnswer
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