Re: Ultramatic Delay

Posted by Tim Cole On 2011/2/13 14:42:59

This is a tough problem because the Packard manual doesn't have a symptom "delayed high range engagement"

I have heard of UM's having this problem and then it just disappears for some unkown reason.

Why not do a compression test and make sure you have at least 100 psi.

Then hook up a tach and check the motor speed during full throttle acceleration.

If you have high range clutch leakage the RPM will be over 2000.

This is easier than pressure gauges because - quite frankly - checking line pressure in the UM sucks