Re: GM 4L60E Transmission Adapted for 1955 Packard 400

Posted by Peter Packard On 2011/10/24 5:04:01

G'day all, I have followed this thread from the start and can appreciate both sides of the discussion. I run cars with Ultra and Twin-Ultra. I have had some issues with rebuilding but have sorted those as I now do them myself. I have done some for other people and run into problems when the converter has been dissassembled by "workshops" without adequate balance marking and it doesn't take much on the ultra and twin Ultra to loosen the front converter snout. The Ultramatic is also extremely sensitive to input shaft wear around the front pump area as it uses the bushes as seals. I went back to the first post on this thread and it is a great conversion. I have got a fairly heavy right boot and the Packard ultra and twin Ultra has not let me down, even when towing some dreadful loads. I admit that I do lift my foot slightly to set the direct drive clutch as it applies. I may be old school. Keep up the good work on finding the ideal conversion and best regards. Peter Toet

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