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Old 03-25-2010, 05:21 PM
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TH350 Valve Body Assembly Help

Okay, so I accidentally forgot to take note of which way this piece goes in (I thought it was the same on both ends...but it isn't). One end's section is a little larger than the other end.

Is this the correct direction to install it?




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Old 03-25-2010, 09:36 PM
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that is the most common sized valve in the boost assembly ...

it will fit and operate either direction
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Old 03-26-2010, 12:03 AM
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Quote:
Originally Posted by stinger12
Okay, so I accidentally forgot to take note of which way this piece goes in (I thought it was the same on both ends...but it isn't). One end's section is a little larger than the other end.
If just for ****s and grins, you want to reinstall the intermediate boost valve the exact same way that it was installed from the OEM, install the slightly wider band into the intermediate boost sleeve FIRST.

The only way this might matter is the wear pattern is already made for the valve in this position.

This is "B" in the enlarged image of just the valve. It looks reversed in the shot w/the valve and sleeve by the VB, but in any event, the WIDER band into the sleeve FIRST.

Good luck.
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Old 03-26-2010, 04:33 AM
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So install it opposite what I have in the picture above? Make b go into the valve body first?
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Old 03-26-2010, 07:18 AM
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Quote:
Originally Posted by stinger12
So install it opposite what I have in the picture above? Make b go into the valve body first?

it does not matter. It will operate either way.

Make sure the valve moves freely and it is all fine
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Old 03-26-2010, 06:19 PM
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Quote:
Originally Posted by stinger12
So install it opposite what I have in the picture above? Make b go into the valve body first?
The end shown as "B" in the LARGE photo is what goes into the sleeve first, then the rest of the components are added, THEN the assembled valve goes in to the VB.

Apparently, it doesn't matter anyway...
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Old 03-26-2010, 07:38 PM
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Quote:
Originally Posted by cobalt327
The end shown as "B" in the LARGE photo is what goes into the sleeve first, then the rest of the components are added, THEN the assembled valve goes in to the VB.

Apparently, it doesn't matter anyway...

Correct. the valve is the same diameter that the fluid pressure operates on.

The stubs on each end are there so the valve does not stick in place via hydraulic pressure. The fluid needs to get behind the valve to move it. You will notice these stubs of various sizes on most of the spool valves in the valve bodys where the valve sit at the end of a bore or against other valves.

Usually , where there is no stub end , you will see where the valve body casting is designed for the fluid to get behind the valve and move it.

A GM engineer explained that to me back in the late 1980's. He was a major contributor to the 200-4r trans design, Ed also worked on the 4L80e trans design.

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Old 04-13-2010, 11:25 PM
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Finally able to get a photo of a group of these valves... shows the end nubs on them

We re-purpose these valves into trans brake valve body for t-350


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Old 04-14-2010, 12:31 AM
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I would love to talk to the guy involved in the 200-4R and 4L80E design.
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