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Lots of talk about the wave plate. My 09 only has 58K on it and the transmission is OK (I have had other problems). Has anyone heard of any sort of preemptive action that can be taken to address the wave plate issue? I know no solution will be cheap and it sure would be nice if GM stepped up with a recall but if I can prevent my family from being stranded on the side of the freeway that is something to consider.
 

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Discussion Starter #2
Oh and I have no idea what a wave plate is so maybe this is a ridiculous question. If it is I am sure some will let me know, kindly. :binky:
 

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Previously posted:
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...

TECHNICAL

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)

Models:
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)



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



Condition

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.

Cause

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.

Correction

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



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

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Since new the trans fluid in mine has been completely changed at 10K because the dealer had to replace the torque converter hub seal, since then I've drained and refilled the trans twice. Get about 4.25 qts out by draining. I'm just now at 46K and about to do it again, don't know if it will work in prolonging the possibility of a wave plate failure but I'm doing it anyhow.
 

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theres a member on the Acadia forum... Keydiesel..
that works on these.
I Believe he said that if youre really worried-- you can have the trans taken apart-- and the wave plate replaced with an updated part---
He said that if youre out of warranty--- and for peace of mind-- its cheaper to have it taken apart- and new part put in....
than it would be to take it apart AFTER its failed.

http://www.acadiaforum.net/index.php?topic=11543.0
 
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