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Old 11-23-2009, 03:53 PM
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TH350 air check issue?

Hey guys..I have an issue with the direct clutch on my TH350 rebuild. I have the front pump rebuilt, and the air check worked great for the intermediate clutch piston. I resealed the direct clutch, and when I tried to air check it, the piston moves really well, but I hear a lot of air hissing past what seems like the seal rings on the stator shaft. No air is coming from the lip seals.
I replaced all the seal rings on the stator except for the nylon support ring on the bottom. I have since removed the piston, and checked all the seals for tears etc. All looked good.The check ball is free as well. Most of the air is coming out of the second direct clutch port on the pump. Is this normal?? How can I find/repair the leak? Please help if you can!

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Old 11-24-2009, 07:41 AM
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Part of an article about 3/4 down the first page shows and explains one way of air checking the direct pack.

"This is an example of how I air check the forward and direct drum. After everything is assembled, I place the drums on the pump (above a hole in the bench) with all sealing rings in place, thrust washers or bearings.
Use a rubber tipped air nozzle to apply air to the passages around the pump circumference. As you apply air to the correct passages, you will see and hear the drums apply the clutches. Be sure there are no leaks from the lip seals. There will be some minor leakage at the sealing rings usually. Iron rings air check better than teflon on the bench."
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Old 11-24-2009, 06:51 PM
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I happend to read that very article.....I can indeed see/feel the piston engage the clutches, and the leaking I can hear is coming from the seal rings on the stator shaft. I think im O.K., I hope.
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