Looking at a 727 that was mated to a 1970 hemi and while I know the engine # is traceable back to the VIN, were transmissions in any way "numbers matching to a specific engine?

Starting in 1969 the VIN or partial VIN was stamped in the passenger side portion of the block on the pan rail and on auto transmissions on the passenger side portion of the bell on a raised hump.

In 68 the partial VIN was stamped on the top of the block and trans at the bellhousing area on some cars.

I’m sure others will pipe in .......

Edited - thanks Rhinodart

Yes, you are correct on the first sentence, the second one you should have said 68. To the OP, your trans will have a stamp on the passenger side and on the drivers side pan rail will be the exact part number of the trans to make sure it is at least the proper application.

To add to Rhino's response, the transmission and engine are stamped with the car's VIN at the exact same moment using the same tool by the same line worker ... WHACK! WHACK! So if the 9 in the VIN is crooked or deeper on the engine, so it will be on the trans.

Here in an example from one of my cars. Notice the "E" and "1" and even "0" (on one side) of both stampings are not as deep at the other numbers and letter.

Thanks guys. This is all very helpful. I took a couple of pictures yesterday, one of which has a number but it was on the driver's side. The other picture I just opened up and zoomed-in and see what looks like another number that I might have missed.

It's been said that the numbers were stamped with a pneumatic "gun" with changeable numbers, much like a date stamp. The operator's grip and positioning of the gun account for the varying quality of the stamps.

What are the part number stampings on the drivers side at the pan rail on the 69 trans?
Matt

Well, I found this same number on the bell housing area of the passenger side.

both of the pics posted in this thread are of the same partial VIN stamping on a 727 automatic transmission

what is the part number on the driver's side?

the partial VIN - 9G244992 is from a 1969 Dodge or Plymouth B-body built at the St, Louis assembly plant

Is it just me, or does that last 9 look out of place, much larger than the others?

a 1970 Hemi transmission will be stamped on the drivers side pan rail PK3410671. then you'll know it's an original HEMI transmission

Thanks guys. I've found the same number on both sides of the transmission and in both cases the 9 is larger than the other numbers. So far, I've found nothing on the pan rail on either side. I'm guessing since the transmission was painted by the person that race-prepped it, the paint filled-in an already shallow stamped number. I'll go back today with some scotchbrite or sand paper to remove the paint.

the 2 pictures you posted are of the same VIN stamping on the passenger side - the PK# & assembly date info will be stamped on the driver's side pan rail

there are no other factory stampings on a 727 transmission case

the partial VIN will point to a specific car - it is probably from a Charger, but I do not have enough info to claim that 100% - is it a 383, 440 or HEMI unit? - you need the PK # to identify the case

Thanks for noting the same pictures were used. You're sure right. My wife sent these to me from her phone. I didn't get to the storage unit yesterday but plan to go today to look further for the numbers along the rail

Here is the #. Once I got it in better light and wiped it off, it's pretty clear

PK2892093L 2793 4134

PK = Kokomo, IN transmission plant
2892093 = 727 for 383 4bbl, 383HP & 440HP
L = ??
2793 = Friday March 21, 1969 transmission assembly date
4134 = transmission unit number

Thanks 6BBL and everyone else that helped and directed me. I found enough on decoding the number to figure out most of it except the date code which I haven't seen an explanation of. So thanks for getting that number decoded.

Just curious, what were the actual differences between a 727 used in a production 440 versus a 727 mated to a hemi? This transmission was actually behind a hemi (and forward of a Dana 60) in a 1969 B-body bracket race car. The transmission has a sticker on it from a well known Oregonian Mopar enthusiast who was a drag racer and who was also involved in selling Mopar parts and service. So, I assume it has a shift kit at a minimum and an aftermarket converter with higher stall speed.

I'm curious too. I understand there were significant upgrades to a hemi trans. I have a 1971 hemi trans. Were all 727 hemi transmissions the same internally year to year?

Hopefully someone here can educate us on this issue. I had this question before but with this transmission it has come up again.