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Accumulator piston

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Old 04-03-2008, 01:49 AM
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Default Accumulator piston

I'm going to be changing the transmission filter soon and I was going to install the aluminum 1-2 piston. Is there also another plastic piston above the 1-2 deeper in the case? I've already searched and haven't really came up with much.
Old 04-03-2008, 06:33 AM
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There is one in the valve body. Here is a photo so you know where it is. It can be installed without removing the valve body along with the 1-2. Vince
Old 04-03-2008, 12:29 PM
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So is it in the same hole as the 1-2
Old 04-03-2008, 12:42 PM
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Originally Posted by MS3Z
So is it in the same hole as the 1-2
no, there's another one " in " the valve body on the side. The picture above in the lower right hand corner.

Be careful when you take the bolts off, it's under " load " from the spring.
Old 04-03-2008, 10:39 PM
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Is the name of the other piston the forward clutch accumulator piston? Sorry for all the questions.
Old 04-04-2008, 08:13 AM
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Sorry. Yes the one in the valve body is the forward accumulator. The one that is held in by three bolts that bolts to the case is the 1-2. The one in the case is the 3-4 but is already aluminum and is probably ok. The 2-3 accumulator is apart of the 2nd gear servo. This is one you do not need to address unless you are installing a vet servo. At that point all you have to do is transfer the guts out of your old servo. Now you know where all of them are located.
Old 04-04-2008, 03:20 PM
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Thanks Vince, I'm doing a Vette servo and a Sonnax billet 4th to. When the tranny decides to **** the bed I'll be buying a FLT.
Old 05-13-2008, 06:31 PM
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if the 1-2 accumulator cracks or breaks what will it do? can it cause rev and 1st not to go?
Old 05-13-2008, 07:46 PM
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Originally Posted by 4.8T
if the 1-2 accumulator cracks or breaks what will it do? can it cause rev and 1st not to go?
usually kills 2nd gear + 4th sometimes
Old 05-13-2008, 08:17 PM
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oh, well its not that lol. mine even jumps when you start it in park. with a big CLANK sometimes. thinking i welded my 3-4 bands


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