Your 'Guide' to the 727/904 transmission

[8stackhemi]

Obviously a joke.

He’s been a FBBO member since 2015. Hee hee, I’m sure he knows his 727’s, or at least knows in his heart that ‘thems are the best!’

 

[66Satellite47]

He’s been a FBBO member since 2015. Hee hee, I’m sure he knows his 727’s, or at least knows in his heart that ‘thems are the best!’

Ya, I do think I know 727's pretty well. They are a great trans. I'm sure other guys know a lot more though. I have a few combinations that I know work really well for drag racing and a couple for HP street cars.

 

[8stackhemi]

Ya, I do think I know 727's pretty well. They are a great trans. I'm sure other guys know a lot more though. I have a few combinations that I know work really well for drag racing and a couple for HP street cars.

Gotta pull the 727 in my coronet this winter. Any suggestions for a street 472 hemi?

 

[440 Charger]

Obviously a joke.
You know the 727 is an excellent piece.
Back in the day the drag racers started going to a Glide. But with those you need to replace everything inside the case with aftermarket super duty parts to handle 600 HP.
A 727 just needs red bands & clutches or equal and a good valve body. Just my opinion.

See you know your stuff a tad.

 

[440 Charger]

Ya, I do think I know 727's pretty well. They are a great trans. I'm sure other guys know a lot more though. I have a few combinations that I know work really well for drag racing and a couple for HP street cars.

The bad is for gas Milledge now a days.

 

[66Satellite47]

The bad is for gas Milledge now a days.

If you are going for gas mileage, 440 wouldn't be my choice. Get a real light import with a little 4 cyl.
Although I built a fairly HP 360 to replace the 318 in my van/tow vehicle that got at least 3-4 MPG better than the 318. So....?

 

[Mike Duncanson]

Hey Mopar Geniuses', new here and could use some help. I've got a 400BB in front of a 727 push-button trans (in a 31 Tudor Model A). Casting #F2464424 0967415. The Dodge dealer and local trans shop can't tell me anything about the history of this. Long story short, the speedo cable was leaking at the trans, and someone had siliconed it, and the cable needs to be replaced (leaking badly). After having it apart, it doesn't look like the ones online with the availability to turn it to set different speeds. On the gage side, it's a 5/8 ID push on with small square inner cable (6' long). I have a feeling this cable might have been made (thus the leak). Any help would be super appreciated! Cheers, Mike

 

[Gldwing57]

Great article.. thanks

 

[YamaDooPolCat]

I hope this thread is still watched.
I am looking at replacing the original 5 speed manual transmission with a 727. Space is limited, but the Tucker specs list the 727 and Allison as options. So Tucker must have used the short tail and yoke that used used in trucks and vans that used the 318 engine.

I just want to be sure this will fit, but so far I have not found anything online that gives the measurement of the overall length of the truck Loadflite transmission. The space I have to work with is roughly 26"
Anyone have a 727 shorty to measure to end of yoke????

 

[Brandy]

I hope this thread is still watched.
I am looking at replacing the original 5 speed manual transmission with a 727. Space is limited, but the Tucker specs list the 727 and Allison as options. So Tucker must have used the short tail and yoke that used used in trucks and vans that used the 318 engine.View attachment 1382291
I just want to be sure this will fit, but so far I have not found anything online that gives the measurement of the overall length of the truck Loadflite transmission. The space I have to work with is roughly 26"
Anyone have a 727 shorty to measure to end of yoke????

Google says 34 3/8"

 

[YamaDooPolCat]

Ya, I saw that measurement, and what then is the long tailstock measurement? It seems 34 3/8" is closer to the long stock length.

 

[Brandy]

Ya, I saw that measurement, and what then is the long tailstock measurement? It seems 34 3/8" is closer to the long stock length.

That IS the whole thing, bell housing to end shaft seal.

 

[Brandy]

23 1/2" - 35" = 11 1/2"

 

[YamaDooPolCat]

The machine I'm working on has a space of about 26" ~ 27" to squeeze in the 727 transmission. The build sheet says the machine has three options for transmission. The 5 speed standard, the Chrysler "Loadflite", and an Allison. Back in 1975 the Allison would have been the AT540.
I don't have a 727 shorty to measure, so I'm wondering what 727 tail stock these guys were using to make the Loadflite fit in that space?

 

[YamaDooPolCat]

I found what I was looking for.
Took a picture.
The tail stock is about 8" long

 

[chrger1967]

Often I or anyone for that matter asks to find out what type of transmission they have in their old mopar. There are hundreds, if not a thousand, of threads on this website identifying, discussing or assisting with this process, troubleshooting or repair.

Because of this large number of threads and the fact that using the search option is unbeknownst to some members, I have put this together.

FIRST AND FOREMOST, HERE IS FRONTAL PICTURES OF THE /6, SB, AND BB TRANSMISSIONS:

View attachment 455769

HOW TO IDENTIFY YOUR TRANSMISSION:

1. Do I have a 727 or a 904?

The picture of the 727 transmission is first, the second is a 904 transmission –


View attachment 455770
View attachment 455771

Gasket pictures to see what you may have from a bottom view

View attachment 455772

2. Here are pictures of 4x4 transmission 727 on the left and 999 on the right

View attachment 455773

3. Where do I look for the identification number’s on my transmission?

You will see a set of numbers starting with “PK” on the driver’s side of the transmission above the tranny pan but below the shifter levers, see below:

View attachment 455774

View attachment 455775

The passenger side carries with it (if its 69 model year only) the complete VIN of the vehicle, 1970 and above have the year, place of manufacturer, and serial number of the vehicle it was made for, see below:

View attachment 455776

4. What are the differences between a A518/46RH, a 904/999/A500 and a 727?


View attachment 455777

View attachment 455778

5. What do I have to do to put a OD transmission in my older vehicle?

Here is a start. There are many sites that cover this swap, but this one is pretty good to get you going.

http://www.transmissioncenter.net/SwapInformation.htm

6. Why is a 727 called a 727 and a 904 called a 904?

The 904 was originally called the Torqueflite 6 and the 727 was the Torqueflite 8. These designations were changed in '64 when the 904 was adapted for use in the new 273 V8 and was no longer a 6 cylinder only unit.

7. What is the difference between a truck and a car tailhousing?

TRUCK HOUSING:

View attachment 455779

CAR HOUSING:

View attachment 455780

8. What is the difference, externally, between a 65 and below 727 and a 66 and up?

65 and below will have the parking brake mechanism located on the outside of the tailshaft housing (see right silver transmission), and the transmission mount is located in a difference place, and has wider bolt/stud mounting holes.

View attachment 455781

Also, 65 and below were a pushbutton design:

View attachment 455782

9. What are the differences between the shift levers, are there any?

Generally, a 727 shifter lever is straight and a 904 is offset (though some applications have different length of levers to compensate for vehicle model/engine combinations).
727 on top, 904 on bottom:

View attachment 455783

10. This will give you an idea to the different styles of throttle pressure (aka kickdown) levers:

View attachment 455784

11. Good reference on what each port does in the transmission case:

View attachment 455785

12. BREAK DOWN OF A 727:

View attachment 455786
View attachment 455787
View attachment 455788

13. DIMENSIONS BETWEEN 727 AND 904:

View attachment 455789

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Remember, only smallblocks have 904 derivative transmissions, though some came with 727’s (i.e. certain truck and HP car models). Big Blocks only came with 727’s.
And here is a kicker to boot.. International Scout’s and other IH trucks used 727’s also.. so did AMC’s here is a pic of a AMC 727:

View attachment 455790

Great resource book:

View attachment 455791

Online Bookstore: Books, NOOK ebooks, Music, Movies & Toys

WELL THAT ABOUT DOES IT.. HOPE YOU ALL GET A LITTLE INSIGHT FROM THIS.. I MAY ADD TO THIS AS I GO ALONG.

How many quarts does a 727 pan hold for it to show full?

 

[RemCharger]

It depends on the pan, the converter, and the cooler. Maybe 8-12 qts . The correct way to find out is run it in neutral and have it at the line below hot.
This way you won't have to try and figure out exactly how much fluid your particular converter/ cooler/ pan combination will need.
The dipstick is your friend on this one

 

[kiwigtx]

The dipstick is your friend on this one

 

[Unkle Krusty]

Some day I will crawl underneath the Tukvan and have a look at the numbers. Meanwhile my guide to a 727 transmission is Doug, to whom I am forever grateful.