Re: Ultramatic Delay

Posted by Mike On 2011/2/12 12:38:13

I had thought that grinding off the check valve thingy-magic per the service bulletin would allow the converter to drain back some and that's why they said to check fluid within one minute of shutting off after that change, vs the 5 minutes as earlier specified.

If you modify that valve per the counselor (as i believe Paul's has been) could it be a side effect that you'll need a 10-30 second delay before using the car after sitting over night? I don't think that's terrible at all IF that check valve is actually the problem and packard recommended removing it anyway.

Edit: I guess the test would be fire it up and run it for a few minutes. Then shut it off, and wait a minute, and if the delay isn't there anymore but IS after waiting overnight again, you'd know right off it's related to converter filling/leakdown?