Ive got a TH400 tranny sitting in my yard covered and waiting to be swapped into my car, but in the mean time I want to know what it came out of. When I got it the guy didnt know what or where it came from all he knew is it works haha.

I found a tag riveted on it and it had a few numbers on it they were,
00-68-06283.

Then I found some numbers and letters that were stamped on top of the tranny, they were CFD 3 and 4-69.

And finally inside the bell housing there were a few more numbers and letters they were, 8626 121 and then D12.

Dont know if that helps, if not just tell me where to find the correct numbers or letters to help decode this Thanks.

 

Anyone know how to decode this? or is there a site I can goto?

 

the 68 is probably 1968.
There should be a 2 letter code painted on the tag.

This one is a BB code.

 

Hmmm, Ill check tomorrow. Are the letters engraved? or painted on? My tag looked like all the paint had been stripped off due to age.

 

Don't worry about the painted letters on the tag. They should've read the same as the first two stamped letters: OO in your case.

The first O is for Oldsmobile, though it's worth pointing out that on rare occassion an Olds-developed TH-400 was used in other makes (such as some Buick GSs getting an Olds OW (W30) trans).

The second O is what will tell you what kind of car the trans came out of, though it's not always real specific. The 68 is indeed the model year. If you can get your hands on a 1968 Chassis Service Manual, you can probably find a chart which will tell you that the OO trans was installed in model XYZ.

06283 was simply a serial number. If I remembe correctly, they started counting with 1001, so your trans was the 5283rd OO TH-400 manufactured for the 1968 model year.

 

I have a copy of this book at home:

http://www.amazon.com/Modify-Hydra-M...9&sr=8-1-fkmr0

It has a list of all the two letter codes in it. I will check it out this evening.

 

hmmm what's mine?

 

Jeff, I can say that yours is clean! That is a nice engine!

 

thanks Jesse

 

Ok, apparently I would need the first two numbers on the tag to determine what year it was. In the book I have the example it gives has a tag with the letters OA with a serial number 73 O - A - 136865. The example is a TH 375 which came behind the SBO 350 in 1973 in B bodies.

The BB transmission that J posted came out of a Buick, and the AJ transmission Jeff posted came out of a Cadillac...

Perhaps the chart isn't fully up-to-date.

 

well being that mine is original (I think!!) maybe it was shared with Eldorados??? I read the entire service history of the car (thanks Joe) and I do not recall a trans repair.

 

So, along these lines, how do I tell if the TH400 is original to my car?

 

A build sheet or protecto-plate should list the exact trans ID number as found on that metal tag.

1968 and up, just find the VIN derivative stamp
LH side, in the cast AL housing just above the pan, about midway for-aft on the pan rail. E.g., 38M100123 for a 68 Olds assembled in Lansing. The matching car's complete VIN would be 3xxyy8M100123, where 'xxyy' are the series and body style characters. A 442 [44yy] convertible [xx67] would be 344678M100123...

 

The first 2 digits are the same as the painted digits, I looked thru the info I have & can't find a "OO" are you sure those are correct?

 

would someone decode below for me:

OB - 69 - 19559

thanks

 

I believe this is from a 1969 Olds 98 455 4 Bbl Hi Comp without Cruise Control

 

thanks

 

Thought this was a 70 .... must have not been original in the 70 donor.


Decode, please

 

tkcutlass, I can't read enough of the tag to help you out except to note that generally a tag that begins with a "P" indicates a trans originally installed in a Pontiac. The second letter (in your case an "A") will indicate what vehicle/engine it was paired with. So, the tag would read PA then the two digit year then the serial number of the trans. If your TH400 was indeed from a 1970,the tag would read PA 70 xxxxx. A "PA" trans for 1970 was originally installed in a car with the base (not HO) 455ci engine.

FYI, the excellent (but unfortunately now out of print) Ron Sessions book on the TH400 has a chart with the codes covering 1964 and up and is my source for the above info.. It goes on for about 6 pages of the book. Great resource if you have access to a copy.

By the way, you realize this is a 7+ year old thread.


Dave

 

Yup but figured keep similar requests together.
P69A 6232 is the full tag

Found this along the way https://www.tpocr.com/oldstc.html
https://www.tpocr.com/pontiactc.html

strange 69 is not listed with the PA

 

According to the Ron Sessions chart, a 1969 vintage PA transmission was OE installed in a Bonneville with a 428ci engine. Yours would be the 6232 of that configuration built. The Bonneville is a full size, B Body car; thus I assume it has the long (9 inch) tail which would be the case if the above is correct.


Dave