Re: Ultramatic Hard Shifting into Reverse

Posted by JeromeSolberg On 2017/5/31 1:09:49

Just an update:

Planning on:

1) Checking the idle speed. The mechanic who got the thing resuscitated may have set the idle speed a bit high. I am looking for an appropriate Digital Multi-meter with an RPM setting. There are a few out there, I probably will go with the Bosch-Actron CP7677.

2) Complete system flush (and replace transmission pan gasket), replacing with Dextron III. I have been thinking about possibly replacing the low-range and reverse piston seals at the same time. It appears I could do that with the transmission still in the car, but I would need the Packard tool PU-308. Is that available or easy to make?

I think the right thing is to do these two things first, out of due diligence. The transmission otherwise operates well - I am loathe (both from the standpoint of not fixing something that is not broken, and from the $$ standpoint) of trying to get the transmission completely overhauled. Some of the problem may also be the differential, but as Fred says, if it operates satisfactorily when the transmission fluid is cold, it may be something else.