1956 Powerglide Casting Numbers

[Wayne L.]

Am looking for Powerglide casting numbers from an original 1956 Corvette. Any help will be appreciated!
Thanks, Wayne

[Joe L.]

Re: 1956 Powerglide Casting Numbers

Am looking for Powerglide casting numbers from an original 1956 Corvette. Any help will be appreciated!
Thanks, Wayne

Wayne------


I believe the converter housing and transmission case are 3708134 and 3708188, respectively. I do not have information on the extension housing.

[John S.]

Re: 1956 Powerglide Casting Numbers

Wayne------


I believe the converter housing and transmission case are 3708134 and 3708188, respectively. I do not have information on the extension housing.

I have #3708134 for all 55 thru 57 powerglide main cases. for the converter housing I have #3708188 which I believe was replaced by #3719243. the latest casting date I believe a #3708188 might have is the is the first week of may, 1955. 1955 corvette #299 has a #3719243 date code E105 and a #3708134 date code E95. so all 56 and 57 passenger and corvette V8 powerglides will have #134 maincases and #243 converter housings.

[David B.]

Re: 1956 Powerglide Casting Numbers

Group 4.317 56-57 Corv. w P.G. extension w bushing Part # 3727024

[Joe L.]

Re: 1956 Powerglide Casting Numbers

Group 4.317 56-57 Corv. w P.G. extension w bushing Part # 3727024

David------


Yes, that's the part number but it's not the same as the casting number.

[David B.]

Re: 1956 Powerglide Casting Numbers

Joe,
Since no casting number shows up in casting/forging ID section for 1956 thru 1960 I would venture a WILD GUESS! that perhaps there is no casting number on this part. The other possibility is the part number is the same since it is listed on pg. 194 of the 6th edition of the 56-57 Judging Manual as the casting number for the powerglide tailshaft. To be honest I am not sure this is correct. Perhaps someone with a powerglide car will crawl under and verify.

[Wayne L.]

Re: 1956 Powerglide Casting Numbers

All-
Thanks for the casting numbers-a big help!
Wayne

[Joe L.]

Re: 1956 Powerglide Casting Numbers

Joe,
Since no casting number shows up in casting/forging ID section for 1956 thru 1960 I would venture a WILD GUESS! that perhaps there is no casting number on this part. The other possibility is the part number is the same since it is listed on pg. 194 of the 6th edition of the 56-57 Judging Manual as the casting number for the powerglide tailshaft. To be honest I am not sure this is correct. Perhaps someone with a powerglide car will crawl under and verify.

David-------


As far as I know, the 1956 extension housing is a cast iron piece. It would be extremely unusual for a cast iron piece to not have a casting number, although it's not necessarily in an easily visible location. The fact that no casting number is shown in the P&A catalogs means nothing. The casting numbers for most cast parts are not shown in the P&A catalogs.

The extension housing in question was supplied with an installed bushing. This essentially makes the extension housing an ASSEMBLY. While occasionally a casting number is the same as the part number for a finished part, I have never seen a case in which a casting number was the same as the part number for an ASSEMBLY. I can't say it could never happen but I've never seen a case of it. Also, note that in the case of several other extension housings which do have casting numbers specified in the P&A catalogs, the casting number is completely different than the part number.

Nevertheless, it will be very interesting to see if someone can report on an observed casting number for a 1956 Corvette Powerglide extension housing. Maybe I'll learn of the first case in which a casting number is the same as the part number for an assembly.

[David B.]

Re: 1956 Powerglide Casting Numbers

Joe --
My reference source was Chevrolet Supplementary and History Information Catalog (printed April 1, 1960) not a P & A catalog. This publication helps identify parts by cross referencing casting, forging, stamping numbers to part numbers. No casting number shows up under Part #3727024 which indicates there may not be a casting # on this part. It would not be the first time I am wrong. As previously mentioned, simply looking at the part will answer any questions.

[Cecil L.]

Re: 1956 Powerglide Casting Numbers

Here is the tailshaft housing (extention) I removed from a 56 in 1972. Cast 3726595. There was no casting date, only a raised numeral 1 on the opposite side from the casting number.

[David B.]

Re: 1956 Powerglide Casting Numbers

Thanks for stepping up with the photo Cecil. You have answered the question.

[Cecil L.]

Re: 1956 Powerglide Casting Numbers

Glad I could help.
This came from a 56 I bought in Hawaii in 72. I wanted to keep the trans but I was transferring back to the mainland and couldn't take it with me. I sold the car to a friend and he wanted a four speed so the PG came out and probably ended up in the dump. I saved the shifter, switch and extension housing.
I think I may have one for a 60 or 61 somewhere in my stash.

[Joe L.]

Re: 1956 Powerglide Casting Numbers

Glad I could help.
This came from a 56 I bought in Hawaii in 72. I wanted to keep the trans but I was transferring back to the mainland and couldn't take it with me. I sold the car to a friend and he wanted a four speed so the PG came out and probably ended up in the dump. I saved the shifter, switch and extension housing.
I think I may have one for a 60 or 61 somewhere in my stash.

Cecil-------


You saved the right part. The converter housing and main case are common to passenger cars, trucks, and Corvettes. However, the extension housing is Corvette-specific.