Re: 55 ultramatic problem

Posted by HH56 On 2010/6/27 13:34:36

Believe the mooing is fairly common. Most avoid it by just letting up on the gas at the shift point. Packard issued a few bulletins regarding the various engagement issues and sometimes noises DD clutch made over the years. Fixes tried range from cutting slots on the lining face to having a slightly different contour of clutch, change of dampening springs to mentioning hard glazed lining as a possibility.

The governor is supposed to drop the direct drive out around 10-15 mph. Perhaps it isn't or is too slow in releasing. Not sure why the extra gas would help unless the idle is awfully low in conjunction with a delayed release. Rebuilt recently, it should be free but possible governor or even DD clutch is sticking. To diagnose, would probably require a pressure test as there are two valves plus the clutch itself involved.

If you put the car up on a lift, can you get an indication of where oil is coming from? Anything from converter should be coming out the weep hole and spread all across the trans bottom. Anything from shaft seals should be mostly located in the area of leak. One other possibility is the oil pan itself. If the bolts were torqued down excessively in past and pan flange was not straightened when rebuilt, it is possible the bolts deformed the area around them. The bolt and hole area will then make contact and be tight before the straight areas between bolts have a chance to compress the gasket. If that is happening, you should see some evidence all along the edge of pan.