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How many miles on your car? Maybe it's time to pull the transmission and do an overhaul? You sound pretty capable and gives you a chance to inspect everything. But I would defer to whatever PGH suggests, this is his area of expertise!

There are 3 plugs just to the right of center at the rear of the bellhousing... i am on the middle plug??? is this the DDC port???

thanks Paul

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Put the pressure gauge on the converter inlet and see.

You wrote "I have drained the fluid several times". Did you reuse or put in new fluid? If you put in new, did it result in subsequent changes removing "black looking oil" leaving the fluid darker and/or dirt being caught in the filter or pan? If it could stick the direct drive valve, it could stick something else.

Again, a set of pressure readings would really help in the diagnostic process and you don't have to take the transmission apart.
Over 50% of the trouble shooting in the service manual depends on taking pressure readings.

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Maybe? From left to right, it's front pump, high range, DDC, front pump relief. See page 30 of the service manual.

Your 0 PSI reading must have been not in H if you had it on the high range one.

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Thats exactly what i was thinking??? Ill figure it out...

Thanks so much for your help on this thing!!!

Just thinking about your Ultramatic and it seems to me that if you've drained out dirty oil, and cleaned sticky valves, that there's a good chance there is still something dirty/sticky causing your DD issues.

It doesn't necessarily explain why you're not getting a pressure reading for the DD, unless you're possibly on the wrong port.

And what happened to begin with that the transmission ended up with this dirty oil? Is it a symptom of wrong oil being used, or was/is there a mechanical issue?

Is it possible that the DD clutch slipped badly in the past and is just worn out? Possibly causing burnt/dirty oil and stuck valves? Maybe the DD is getting pressure but just can't engage because it's worn out and/or glazed?

Just throwing out some ideas.

Yeah that's another mystery, the dirty fluid. You should never really see that in a first gen Ultramatic unless you like to switch from Low to High at speed. Without that, the high range clutch and the bands won't wear out for a very long time.

Now, for the DDC on the old ones, that might actually wear down. The newer type don't physically wear down they just get rock hard. But I don't remember for the old type.

We need to see what's up when you're sure you're at the correct takeoff port, and driving at speed. Also, did you ever check on the throttle linkage?

PGH, can you correctly identify the ports for us? I must admit when I read the manual it's not completely clear to me which is which.




Am I correct, that if the throttle valve was the issue, that is, it was out of adjustment enough that it was being held open way too long, or even all the time, the governor would take over and engage the DD around 50 mph?

PGH & 53 Calavier... thank you for looking into my saga... LOL as far as the dirty oil, yes the original oil was pretty dirty when drained.... This car based on the license plate that was still on the car had not ran for any length of time since 1974... The engine valve covers were in the trunk, and it had dirt dauber nests in the valve area.... So it had been stationary for LONG time... Back to the UltraMatic, In the pic that 53 posted, i have been looking at the center port of the 3 ports with the 1/8 plugs... Hopefully that is the DD clutch...
I know for sure i need to do a complete pressure test, but i work 12 hrs so the weekends or a few mins in the afternoons are about all i have to look at it.. If im not completely done for the day....

1 thing i thought of yesterday and preformed a quick test last night... I took the car out on a back road and got it up to about 50 MPH and placed the shift in neutral, then killed the engine.... I then turned the key back on, moved the shifter to drive... and nothing happened, making me think that the rear pump is not working.... Just as soon as i can, now that i understand more, im going to do a more complete pressure test.... Hopefully to get a better picture of whats going on.... If it turns out that the trans has to come out, im moving on to body work for the summer, and will pull it and rebuild this fall.....

Thanks again to all who have burned brain cells on this thing.. I love working on these things...

The four ports are shown in the image. The 3.5768 is used on the front pump relief circuit to reduce valve flutter on early transmissions; it's actually shown on Howard's charts:packardinfo.com/xoops/html/modules/newbb ... 7475&post_id=262827#forumpost262827

Then, the manual clearly gives the 1/4" pipe plug (vs. the three 1/8") as the front pump (pressure) circuit. Considering there's only two plugs left, I think it's pretty clear what all is what.

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