Broken Wave Plate - EnclaveForum.net: Buick Enclave Online Community
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post #1 of 570 (permalink) Old 06-20-2011, 02:44 PM Thread Starter
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Broken Wave Plate

I’ve been reading all the “broken wave plate” posts and was wondering how common is this failure and is any one year more prone to failure more than another? It appears this part is made of cheap materials, however, is it a vendor quality issue and can we all expect a failure before 100k?

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post #2 of 570 (permalink) Old 06-20-2011, 03:03 PM
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Re: Broken Wave Plate

Just for data collecting on this thread:

I do NOT have this problem, 2009 Enclave FWD CX, 18,700 miles

Traded in June 9th 2016: 2009 Enclave CX FWD 8 passenger, silver green metallic, ebony cloth, driver's conf. package, tow package.&nbsp; (Was an order, built July 28th 2008, delivered&nbsp; July 31st 200<br /><br />Currently have:<br />2016 Impala 2LT V6, since June 9th 2016<br /><br />1972 Pontiac GTO.&nbsp; Owned since 1998
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post #3 of 570 (permalink) Old 06-20-2011, 03:24 PM
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Re: Broken Wave Plate

Ive read of the issue. as theres been posts about it.
But I wouldnt say its a VERY common issue.

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post #4 of 570 (permalink) Old 06-20-2011, 09:46 PM
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Re: Broken Wave Plate

What's a "wave plate"?

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post #5 of 570 (permalink) Old 06-20-2011, 10:03 PM
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Re: Broken Wave Plate

Quote:
Originally Posted by JK27
What's a "wave plate"?
a wave plate as a cushion plate


http://www.performancetrucks.net/for...d.php?t=419779

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post #6 of 570 (permalink) Old 06-24-2011, 10:59 PM
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Re: Broken Wave Plate

Quote:
Originally Posted by Sailfish
Thanks for the link. I've been curious to know what the wave plate is, too.

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post #7 of 570 (permalink) Old 06-25-2011, 10:00 AM
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Re: Broken Wave Plate

Thanks SAILFISH! I had a broken wave plate problem with my 08 Enclave at 55k miles. The mechanic showed me a broken a wave plate he pulled out of a tranny the previous week. It looks just like the rings shown in your link above. The transmission wouldn't shift above third gear. I questioned the mechanic about the failure mode - he said that the transmission has speed sensors that measure the input and output speed of the transmission. This infomation is used by the Transmission Control Module to shift the transmission. The broken wave plate was brittle from heat and broke. What happens is - some metalic parts get attracted to the magnetic speed sensor, and blocks the speed sensor from working, so it won't shift properly. The broken wave plate seems to be the 3-5-R plate, with an engine code of P0716 among others.
To fix this - the transmission must be dropped, and disassembled. Broken metal parts have to be removed, the input speed sensor replaced, a new plate installed, and the transmission fluid lines including the transmittion cooler were flushed. I am not sure if there are filters in the transmission - my repair invoice did not list any filter changes. One recent post on this matter said there are no filters. Kind of strange I would think.
I don't belive this is a wide spread problem as not that many posts. However my dealer mechanic had fixed a few.........

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post #8 of 570 (permalink) Old 06-25-2011, 10:44 PM
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Re: Broken Wave Plate

The transmission does have a filter, but it is only can be replaced by splitting the tranny case open. Maybe they don't replace them even if they have it apart?
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post #9 of 570 (permalink) Old 06-30-2011, 01:50 PM
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Re: Broken Wave Plate

I have a 2008 Enclave. As posted elsewhere, just had the broken wave plate and speed sensor fixed on my car right after it hit 100k.
The plate cost $5.63. The sensor cost $28.42. But the labor cost $2,000. Ouch.

The Buick Customer Care people have been really excellent through this process. They just notified me that they will be refunding 30% of the cost back to me as a goodwill gesture. Good luck and be relieved if it's the wave plate and not the entire transmission!

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post #10 of 570 (permalink) Old 06-30-2011, 01:55 PM
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Re: Broken Wave Plate

Quote:
Originally Posted by kirk7martin
I have a 2008 Enclave. As posted elsewhere, just had the broken wave plate and speed sensor fixed on my car right after it hit 100k.
The plate cost $5.63. The sensor cost $28.42. But the labor cost $2,000. Ouch.

The Buick Customer Care people have been really excellent through this process. They just notified me that they will be refunding 30% of the cost back to me as a goodwill gesture. Good luck and be relieved if it's the wave plate and not the entire transmission!

Yikes, that is an expensive break down! At least Buick is helping out a bit. Hopefully you don't have an more major repair expenses in your Enclave's future. Good luck.

2008 Gold Mist Enclave CX AWD, Cashmere Cloth, Driver's Confidence Package, 8 passenger seating
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