Thread: Rebuilding Valve Body

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  1. #1 Rebuilding Valve Body 
    SE Level Member chrisrexmandie's Avatar
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    Has anyone installed the Sonnax valve kit 84754-43k? I looked up the instructions on Sonnax website and it mentions this one part about using a drill bit to bore out the end of one of the bores but it is very vague. Could anyone help clear up how this is installed. The whole reason I'm rebuilding the transmission is due to TCC shudder. So if this kit will help id like to install it. Plus I already have it.
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  2. #2 Re: Rebuilding Valve Body 
    GrandPrix Junkie SgtMarshal's Avatar
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    if you don't get a reply on here, I would recommend asking Dave at TEP. you can email him.

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  3. #3 Re: Rebuilding Valve Body 
    Solving problems BrandonHall10's Avatar
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    Quote Originally Posted by chrisrexmandie View Post
    it mentions this one part about using a drill bit to bore out the end of one of the bores...
    I have not personally installed this kit, but I have some transmission experience. After reading the instructions, it looks like they tell you to use that drill just to chamfer the leading edge of that valve bore. To kind of "funnel" that sealing ring into the bore. I would do that by hand. Not with a power drill.

    The edges on some of those bores are razor sharp. If you jam that valve into that bore and the PTFE seal is sticking out even a little, you will shave it right off. This is also the reason for the 45 minute paper tube trick. Trying to squeeze that seal into the valve.
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