Re: transmission number

Posted by HH56 On 2015/8/23 11:33:37

The only place the 395280 shows up is in the 48-54 parts book so no help or sign in earlier books that case was original to other years.

I am wondering how much difference there actually is in trans cases over the years. There are several on the forum running transmissions with the 22nd or 23rd R11 ODs on their prewar cars so we know the later cases bolt up to the earlier bellhousing. I would expect the same from the non OD cases.

I believe there may be mounting spots for some option items on earlier cases not there on later cases and I believe there is another difference just recently pointed out with the number and location of holes for cross member mounts. Believe it was two per side on the pre 48 transmissions to four on the 48-50 units. Perhaps that is the main difference with the cases.

Since many of the internal parts are the same pre and postwar then if the prewar covers will also bolt on perhaps someone needed a new box for his prewar car and swapped the older cover and cane shift into a later unit. Maybe the trans was rebuilt by a dealer and the later cases were the approved factory substitute.

Anyone know how far back into the 30s later transmissions will bolt on?