Your 'Guide' to the 727/904 transmission

66Satellite47

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A 361 is a low deck BIG BLOCK, the case will bolt up to a 440. There are many, many combinations of internal components in 727's BB & SB. The parts are generally the same but have different front servo lever ratios and servo springs, front clutch springs, number of clutch discs, band and clutch materials, valve body & governor settings depending on the OEM application. For a low perf 440 as a cruiser, most all will be fine.
 

dagomike

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Well I pulled the trigger and I bought the 727 Cable Shift Trans. Popped the pan and took some photos. The valve body is part 2400540. Is there a way to determine if a valve body is reverse manual shift pattern with out splitting it open? I think this thing has a bolt in sprag mod and a manual reverse shift pattern valve body but I cant find any info on the part number for the valve body and to be honest I dont know what to look for. lol. Any help as always is appreciated. Photos attached. Oh and it is a big block transmission.

20210104_173834.jpg 20210105_095435.jpg 20210105_100245.jpg View attachment 1050752
 
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Dipstick

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The two tangs on the rooster comb (circled in red) means the valve body will work with a console or column shifter. Above that,
t.jpg
the throttle valve is in the fully automatic configuration.
 

66Satellite47

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I don't think you can go by that. The internal mods used on a manual valve body are what makes it manual. If was a race trans maybe manual, otherwise not likely.. Mopar valve bodies could be modified for manual shift without having obvious signs. Although that does look stock.
 

dagomike

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I don't think you can go by that. The internal mods used on a manual valve body are what makes it manual. If was a race trans maybe manual, otherwise not likely.. Mopar valve bodies could be modified for manual shift without having obvious signs. Although that does look stock.
Thanks fellas for your advise. I should have known this was for a console shift trans when I pulled what was left of the shifter cable out of the receiver and it had the wide 1/4" groove in the bayonet. I believe that is the final verification for console style shifter compatibility. No expert but I am learning something every day... Lol. I will learn more about the valve body when I pull it and split it open to see what is going on in there. Thanks for all the Help!
 

66Satellite47

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One of the early DC bible's has the complete description of modifying the stock valve body to a manual shift. That would be a guide.
IIRC the console shift cable is slightly different, but the valve body accepts both styles. May be wrong about that.
The '65 727 I bought had a modified OEM valve body for manual shift, console shifter & cable, late model input to accept the late model converters, and the slip yoke, still with the reae pump.
 

dagomike

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One of the early DC bible's has the complete description of modifying the stock valve body to a manual shift. That would be a guide.
IIRC the console shift cable is slightly different, but the valve body accepts both styles. May be wrong about that.
The '65 727 I bought had a modified OEM valve body for manual shift, console shifter & cable, late model input to accept the late model converters, and the slip yoke, still with the reae pump.

Sounds like you scored on the 65 tranny. I will split the valve body and take a peek soon. As far as the shifter cable goes this 63 tranny came out a running car that swapped to a 4 speed set up and the cable bayonet groove was the wider one @ 1/4" approx. So many different variables for these cable shift 727`s, you really have to do your home work when purchasing them. Thanks again, for your advise and input. Mike
 

66Satellite47

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Sounds like you scored on the 65 tranny. I will split the valve body and take a peek soon. As far as the shifter cable goes this 63 tranny came out a running car that swapped to a 4 speed set up and the cable bayonet groove was the wider one @ 1/4" approx. So many different variables for these cable shift 727`s, you really have to do your home work when purchasing them. Thanks again, for your advise and input. Mike

Ya but that was '74 when parts were readily available!
 

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I was basing my judgment on the throttle valve not being modified to wide open but the orange regulator spring suggests that it could be kitted. Stock springs are black IIRC.
 

dagomike

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I was basing my judgment on the throttle valve not being modified to wide open but the orange regulator spring suggests that it could be kitted. Stock springs are black IIRC.

I was thinking the same thing as when I compared a valve body out of a small block cable shift 727 tranny I have out of a 65 the springs do look different and beefier. I think I may have found a jewel at a reasonable price. I am gonna have a friend come over and take a look at it that has much more experience with trannys then I do. Thanks for your input, Mike
 

dagomike

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This is Bob can you send me a pic of the cable end you need

Hey Bob, I don't have a photo, but the one I need has the wider bayonet groove on the receiver end that attaches to the rooster comb area approx. 1/4" inch and the shifter side has the wider 1/8" inch hole approx. that attaches to the shifter. I am not sure about the length I need as I have not found any information regarding that yet. Thanks and let me know, Mike
 

dagomike

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Thanks Bob, but that is not the one. see the grove at the end of the bayonet pin. That one has the small 1/16" groove. The one I need that groove is closer to 1/4" wide. That is what I understand from the research I have done. Like I said before I am no expert but I have been studying up on these transmissions. I will try to swing by the shop tomorrow after my dentist appointment and take a look. Thanks, Mike
 

Dipstick

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Here's a pic I found, cable end on left is for console or column, right is push button.
Cables&adapters.jpg
 

dagomike

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Here's a pic I found, cable end on left is for console or column, right is push button.View attachment 1052069

That`s the one I need! Do you happen to know what length I need for a console shift car? You are awesome for helping out by the way. Thanks

Note for folks following this thread. The wider groove on the console-column cable bayonet is needed for the additional play associated with these setups. That is what I read during my research on these cables. Please correct me if I understood this wrong.
 

moparsquid

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Here's a pic I found, cable end on left is for console or column, right is push button.View attachment 1052069
That`s the one I need! Do you happen to know what length I need for a console shift car? You are awesome for helping out by the way. Thanks

Note for folks following this thread. The wider groove on the console-column cable bayonet is needed for the additional play associated with these setups. That is what I read during my research on these cables. Please correct me if I understood this wrong.
Got these

20210108_144256.jpg
 
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