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727
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   Forward Look Technical Discussions -> Transmission and Rear AxleMessage format
 
Rockkers
Posted 2021-01-19 9:30 PM (#607898)
Subject: 727


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Posts: 28
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Location: Canada / Quebec
Hey guys on my search from a previous thread i would like to know what are the difference over the years on the 727

I know there is A727a for small block
A727b for big block
Was made at a time A727g i think for /6
(I know the made different housing for other brands as well)
1962 to 1966 was 19 spline torque converter
1967 to 1978 ish 24 spline torque converter
1978 and up with lock-up had 23 spline? Really not sure
I know the OD version is A518

And most important to know would be bolt patern change through the years? I tried to get an answer but unsuccesfully
Just wanted to make sure before any purchase hahahahaa

Thanks again for your input on a little new like me
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58coupe
Posted 2021-01-20 11:39 AM (#607904 - in reply to #607898)
Subject: Re: 727



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You have done a lot of research. As to bolt patterns, AFAIK there are only 3, slant 6, small block, big block. many people like to use the 62-64 unit because it still has the cable shift and can be adapted to the earlier pushbuttons. There are also short and long tail housings. Do not confuse the 727 with the lighter duty 904 which was used behind slant 6 and small blocks.
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57chizler
Posted 2021-01-20 11:54 AM (#607905 - in reply to #607898)
Subject: RE: 727



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Rockkers - 2021-01-19 6:30 PM

H
And most important to know would be bolt patern change through the years? I tried to get an answer but unsuccesfully
Just wanted to make sure before any purchase hahahahaa


All of the available 727 adapters use the small block case, easiest way to tell the difference is by the bottom bolt holes (see pic). The /6 case has the starter hump up high instead of off to one side.



(Bllhsngs with text.JPG)



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Attachments Bllhsngs with text.JPG (51KB - 256 downloads)
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Rockkers
Posted 2021-01-20 12:17 PM (#607907 - in reply to #607898)
Subject: Re: 727


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Posts: 28
25
Location: Canada / Quebec
Wow thanks a lot! Would you guys think either torque converter/flexplate would fit with the conversion plate?
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Rockkers
Posted 2021-01-25 10:01 AM (#608155 - in reply to #607898)
Subject: Re: 727


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Posts: 28
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Location: Canada / Quebec
Or i just need to take the torque that goes on the transmission for the year it was built?
I read that a flexplate from a 426 would have 8 hole like my 354, would that be correct? I couldnt find any good and sure picture to be certain
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Mopar1
Posted 2021-01-25 10:37 AM (#608160 - in reply to #608155)
Subject: Re: 727



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Rockkers - 2021-01-25 9:01 AM

Or i just need to take the torque that goes on the transmission for the year it was built?
I read that a flexplate from a 426 would have 8 hole like my 354, would that be correct? I couldn't find any good and sure picture to be certain
Bell pattern & crank flange changed in '62. The 392 to 727 will work on all short tail hemis. The 426 Hemi flexplate is what you need. You'll have to tap out the flange holes with a 1/2-20 tap. torque converter for the tranny your using.
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Mopar1
Posted 2021-01-25 10:38 AM (#608161 - in reply to #607898)
Subject: Re: 727



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Small block 727, not BB.
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wayfarer
Posted 2021-01-26 7:43 PM (#608227 - in reply to #607898)
Subject: Re: 727



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If you are shopping for an adapter for 354 to 727 be sure that you get the block adapter as well as the crank flange adapter. Block adapters are available by themselves for some manual trans adaption so be sure to get the right parts.
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RICKYMOPAR
Posted 2021-01-26 8:36 PM (#608232 - in reply to #607898)
Subject: Re: 727



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Early A engine adapters.



(Early, A engine adapters X.jpg)



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Attachments Early, A engine adapters X.jpg (215KB - 273 downloads)
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Rockkers
Posted 2021-01-26 9:24 PM (#608239 - in reply to #607898)
Subject: Re: 727


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Posts: 28
25
Location: Canada / Quebec
Great help guys!!!! Will try to keep you posted fo the info to be complete on the thread!
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Rockkers
Posted 2021-03-17 8:29 PM (#610055 - in reply to #607898)
Subject: Re: 727


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Posts: 28
25
Location: Canada / Quebec
Hey guys just another question! Still in the link of the 727, for the cross member, which or what kind would it take? I read a bit on the 518 cross member that may work but want to know what you think.
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56D500boy
Posted 2021-03-17 11:29 PM (#610057 - in reply to #610055)
Subject: Re: 727



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Rockkers - 2021-03-17 5:29 PM
Hey guys just another question! Still in the link of the 727, for the cross member, which or what kind would it take? I read a bit on the 518 cross member that may work but want to know what you think.


I have opinions as to what you might want to avoid, i.e. slicing and dicing your existing cross member.

Read through this thread and then come back with more questions:

http://www.forwardlook.net/forums/forums/thread-view.asp?tid=73638&...

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57chizler
Posted 2021-03-18 3:01 PM (#610092 - in reply to #610055)
Subject: Re: 727



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Here's a pic of the transmission mount in my '57 NY. The trans is a '65 and the mount is a '69-later spool mount. There is a difference in the spacing of the mount bolts in the early/late tail housing so the spacer above the mount acts as a bolt pattern adapter and a spacer.

The '66 later tail has the mount pad further back, so turning the crossmember around gives more room.



(transmount.jpg)



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Attachments transmount.jpg (72KB - 186 downloads)
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56D500boy
Posted 2021-03-19 6:58 PM (#610156 - in reply to #610057)
Subject: Re: 727



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Found this in a transmission conversion written by Dave H. who converted his 56 Dodge with PowerFlite to 1962 Aluminum case 727:

"A. Transmission core: 1962 A727 (any 1962 to 1965 A727 TorqueFlight will work) for an A series small block (318).
1. A later mechanical shifted (1966 and up) A727 could be used. Imperial Services has available a kit to allow the original pushbutton shifter to be used to shift the newer transmission. This requires replacing the detent spring in the valve body with a softer one so the light force of the cable can make the shifts.

B. Tail section: 1962 Chrysler (B727, from a B series big block engine: 361, 383, 413, 426) with brake drum on the end, to be installed on A727 case. This is the only 727 TorqueFlight available with an emergency brake drum.
1. If a transmission without a brake drum is used, there will be no emergency brake. There are 2 alternatives: swap the rear end for a newer 8 3/4 with emergency brakes. Or convert the original rear end brake assemblies to later designs that have built in emergency brakes.
2. The transmission emergency brake drum also does double duty as a parking function. There are 2 alternatives: use a rear end with a built-in emergency brake. Or use the (62 - 65) cable actuated park function in the tail section. A 62 - 64 factory dash mounted park lever might be mounted to actuate the cable. Only concern is in the factory pushbutton set up, the trans could not be shifted out of neutral until the park lever was disengaged. Since there is no link in a 56, you could put the trans in Drive and apply power with Park still engaged. "

Regarding the cross member, Dave H. said:

"2. Transmission cross member support: no changes required. The Imperial Services mount designed to fit the 727 and the old cross member works fine, except the hole locations are off 1/4 inch to the rear because of the thicker adapter plate. Install the mount on the tranny, install cross member, lower tranny onto cross member. Align holes equally left and right to align transmission on cross member. Just drill up through the existing cross member holes to make matching holes in the mount. Bolt in place. (If using a 56 - 61 cast iron TF, you will need to relocate the frame mounts 3 inches rearward.)"

Here is a link to Imperial Services rear transmission mounts:

http://www.imperialservices.net/imps.html

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