Re: How do I validate 1954 Clipper Deluxe transmission

Posted by HH56 On 2018/7/1 9:40:30

Another easy check without opening the hood is look at the shift quadrant indicator. Regular Ultras read P-N-H-L-R and the Gear Starts will have an additional detent position indicated by a dot next to the H.

It is unlikely you have a later Twin Ultra in a 54 from the factory but it is possible a conversion was made after it left. The 54GS and 55TU units were very similar internally and functionally with a few minor valving refinements made between the two mostly to improve shift points for the higher horsepower V8 engine. There are physical requirements and changes needed to bolt the later TU internals and case onto the S-8 engine and mount in the chassis. As long as you have some specific parts -- 54GS bellhousing being the main item -- it can be done.

The forum webmaster is in the process of rebuilding the considerably improved 56 TU for the conversion to his 54 Clipper with Gearstart. You might check out the last dozen or so pages of his project blog for some additional insight on the internal differences between units and conversion work needed.https://packardinfo.com/xoops/html/modules/newbb/viewtopic.php?post_id=203912&topic_id=57&#forumpost203912