Re: 727 Question
[Re: 1970RT]
#2946024
07/22/21 01:14 PM
07/22/21 01:14 PM
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Joined: Apr 2003
Posts: 12,245 Looking for a way out of Middl...
IMGTX
I Live Here
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I Live Here
Joined: Apr 2003
Posts: 12,245
Looking for a way out of Middl...
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There are lots of people on here that will give you excellent advice as to when to get billet drums or which valve body to use but I suggest you research who is best at mopar transmissions. Often you get guys who have only built GM trannies selling themselves as building anything. I can tell you from experience there are nuances for every transmission and some shops may not understand what really is good or bad for a particular brand build. Get references or ship it to one of the guys on here that build them and know them. Hope it is some help.
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Re: 727 Question
[Re: 1970RT]
#2946026
07/22/21 01:20 PM
07/22/21 01:20 PM
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Joined: Jan 2003
Posts: 25,988 Rio Linda, CA
John_Kunkel
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 25,988
Rio Linda, CA
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Ask around the local Mopar crowd for recommendations of somebody local who knows Torqueflites.
The INTERNET, the MISinformation superhighway
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Re: 727 Question
[Re: 1970RT]
#2946110
07/22/21 06:08 PM
07/22/21 06:08 PM
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Joined: Mar 2011
Posts: 3,102 Michigan
A727Tflite
master
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master
Joined: Mar 2011
Posts: 3,102
Michigan
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I need to take a big block 727 to a trans. shop to get it beefed up for an approx. 600 hp stroker motor I am building. I am using a 727 from a 1973 C-body as the core. I would appreciate any information on what to ask or expect the trans. shop to do in building the trans. for my application as I know next to nothing about building a transmission or transmission internals. Thanks in advance. Why not ask the trans shop what they plan to do then post that info here. Let’s see how good they are.
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Re: 727 Question
[Re: 1970RT]
#2946175
07/22/21 09:08 PM
07/22/21 09:08 PM
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Joined: Jan 2003
Posts: 12,287 Benton, IL.
DaveRS23
Special needs idiot
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Special needs idiot
Joined: Jan 2003
Posts: 12,287
Benton, IL.
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For most street applications, it doesn't take much to get a 727 to handle 600 horse. What are your plans for the 600 horses? Street, track, combo?
Master, again and still
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Re: 727 Question
[Re: DaveRS23]
#2946288
07/23/21 09:39 AM
07/23/21 09:39 AM
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Joined: Dec 2013
Posts: 4,704 Wichita
GY3
master
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master
Joined: Dec 2013
Posts: 4,704
Wichita
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It doesn't take much to get one to reliably take 600 hp.
I built my own with really not much more than better clutches and steels and a TA manual valvebody.
It has over 7,000 miles and hundreds of dragstrip passes. I do try to inspect it at least annually as we have started spraying a 250 shot on top of the 600 n/a.
Low band apply valvebody and NOT doing 1st gear burnouts are keys to longevity with the 727.
'63 Dodge 330 11.19 @ 121 mph Pump gas, n/a, through the mufflers on street tires with 3.54's. 3,600 lbs. 10.01 @ 133mph with a 250 shot of nitrous an a splash of race gas. 1.36 60 ft. 3,700 lbs.
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Re: 727 Question
[Re: GY3]
#2947020
07/25/21 03:40 PM
07/25/21 03:40 PM
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Joined: Jan 2003
Posts: 1,178 People's Republic of Kali
70runner
super stock
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super stock
Joined: Jan 2003
Posts: 1,178
People's Republic of Kali
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Another option - rebuild it yourself. There are some excellent 727 build books, plus many experts on here (some have responded). There is a 727 rebuild instruction here: https://www.mopar1.us/727rebuild/Used Pat Blais, otherwise known as Torqueflite Patty, as a resource for both parts and advice. Great guy, but believe he is retired now tho. Between the 727 books and his advice, managed to rebuild my first 727 to mate with a healthy 440-6. I would email pix/descriptions to Pat and he would evaluate condition and/or remedy if issues were apparent. Upgraded to 4 pinion planetaries, shift kit, better clutches/steels, deep pan, and some new parts, but otherwise no major mods. The advantage, of course, is when completed you possess more knowledge to troubleshoot/repair/upgrade the 727 as needed. As an option you could run a build thread on here and the experts could chime in as needed.
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Re: 727 Question
[Re: DaveRS23]
#2947027
07/25/21 04:00 PM
07/25/21 04:00 PM
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Joined: Jan 2003
Posts: 16,932 NC
440Jim
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 16,932
NC
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For most street applications, it doesn't take much to get a 727 to handle 600 horse. What are your plans for the 600 horses? Street, track, combo? I agree. Post your application/plans/etc. But to get things started, I suggest. 1) Good quality clutches. Borg Warner, Raybestos, Alto Red Eagle 2) Have them replace all the bushings now. Then it may never need them again (except the converter bushing might need replacing again). Added labor will apply. 3) Have them replace all the thrust washers now. Again, they will last a long time. Parts are inexpensive, and no added labor. 4) I prefer the driveshaft seal with the dust boot. Most kits only come with a lip seal and no dust boot. 5) A little more line pressure than stock. At least turn up the factory valvebody regulator some. Shift kits typically recommend this. An aftermarket valve body typically is already higher pressure.
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Re: 727 Question
[Re: 440Jim]
#2947043
07/25/21 04:43 PM
07/25/21 04:43 PM
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Joined: Jan 2011
Posts: 15,938 Central Florida
larrymopar360
Stud Muffin
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Stud Muffin
Joined: Jan 2011
Posts: 15,938
Central Florida
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I'm going to be needing a big block 727 soon also and I think I'm going to skip getting a core for local shop to build. I've lost confidence in local shops that were at one time good. I'm going to buy one that's built and have shipped. Possibly B&M or TCI. I have a TCI small block 727 and it's been very good for years/miles.
Facts are stubborn things.
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Re: 727 Question
[Re: larrymopar360]
#2947345
07/26/21 01:31 PM
07/26/21 01:31 PM
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Joined: Sep 2003
Posts: 19,624 north of coder
moparx
"Butt Crack Bob"
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"Butt Crack Bob"
Joined: Sep 2003
Posts: 19,624
north of coder
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the book by carl monroe is very good, and the book offered by the ATSG [Automatic Transmission Service Group] is good as well, so the money spent on these two books is a bargain and a half if you want to rebuild your transmission yourself. the 727 is arguably the easiest transmission to rebuild, and requires only a few "special" tools that can be easily fabricated, even if one has very limited fabrication skills. i am no transmission expert by any stretch of the [my] imagination, but i have done several over the years, and have been successful.
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Re: 727 Question
[Re: desotodude]
#2953490
08/13/21 03:59 PM
08/13/21 03:59 PM
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Joined: Jan 2003
Posts: 25,988 Rio Linda, CA
John_Kunkel
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 25,988
Rio Linda, CA
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Easiest way to ID the BB and SB 727 is by the bellhousing .
On the reply page, look for ATTACHMENT MANAGER near the bottom left. Use it to attach pics.
The INTERNET, the MISinformation superhighway
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