Re: '56 Patrician New Owner Questions.

Posted by Leeedy On 2018/7/24 20:53:46

Some additional information important to this car...

Many of the folks rebuilding these transmissions do not understand this equipment and try using methods used on conventional automatics to rebuild... then end up damaging the transmission.

A couple of very important points on the 1956 Twin Ultramatic transmission that are almost always ignored, or not known, but can lead to troubles:

1.) The 1956 Ultramatic is all aluminum case and bell housing. If one uses 1955 or earlier torque specs (many people have done this and could not figure out later what was wrong), the bell housing bolts will strip the threads in the case and adios muchacos. The front gasket will leak forever after that. And there will be other problems. Also those bolts need to be installed in the precise exact factory positions or... you get a leak again and other problems.

2.) The mating between the pan, gasket and case needs to be clean, dead flat (pan flange and case) and properly torqued. Over-torque it and you've got stripped threads or distorted pan flange or both... and then you've got a leak again.

3.) The torque converter halves need to be marked in such a way (PRIOR to disassembly) that they are re-assembled in the exact same position as when they left the factory. Most people doing re-builds on these converters/transmissions don't seem to know this fact and end up with a vibrating trans or worse. And then can't understand why and blame it on the Ultramatic. If your torque converter flanges don't have a mating mark, they are probably assembled improperly.