Re: Identification of Packard transmissions

Posted by HH56 On 2023/6/11 18:23:05

And if you have access to the transmission you might also measure the input shaft diameter. It is identified as an R11-1B and since it has the extra -1B designation it may be a transmission for the 356 and have the larger diameter input shaft only used on that engine.

It has been reported that Packard did switch to the same shaft for all at some time during the R11 use but that might have been after the 356 was discontinued.

Pilot bearing surface at shaft end for 356 use should be near 3/4" with about a 1 1/8" spline part while the smaller engines have a pilot of about 1/2" and splines just over 7/8".