Full Race 904 D/2 Problems

slant six said

Hello, I did not air pressure test anything, I am not quite sure about how to implement this technique.
FOr this build I did not have the pump apart except of course the input shaft was out of the center of the pump.

I have High Gear, It just does not consistently stay there.


Greg

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If it's a leak but not one to lose 3rd completely it can hunt back and forth.
If you pull the valve body down you can apply air pressure to the ports where the valve body meets the case front and back.
Those holes are where the fluid flows through to get to where it needs to go, and hitting specific holes with air pressure applies each clutchpack and and servo individually so it make a problem stand out as a big air leak.

Here's the diagram for which ports and what they apply.

Be warned not to pressure test the converter ports or you'll get a nice oil shower. :D
And in your trans the governor ports are useless for testing anything.
Just do all the clutches, bands and servo ports with about 30 lbs if you have a choice because it is possible to blow lip seals inside out and have to take it all apart because of a problem that wasn't there initially.
An obvious "Thunk" sound is heard when you apply air to a clutchpack and you can see servos and bands move when you test them.

I think I covered it.

Right click the name of it below and select "Save target as" and save it to your computer.