727 race rebuild question
#1740522
01/27/15 06:59 PM
01/27/15 06:59 PM
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Joined: Aug 2011
Posts: 251
Saskatchewan (SK)
79410aspenrt
OP
enthusiast
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OP
enthusiast
Joined: Aug 2011
Posts: 251
Saskatchewan (SK)
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I will be rebuilding my 727 in the near future. It's stock from 1979 and needs attention. I have a manual (forward pattern) valve body. I'm not going trans brake so what parts should I use for the rebuild? It's going behind a 650 hp small block.
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Re: 727 race rebuild question
[Re: carhunter]
#1740526
01/27/15 10:49 PM
01/27/15 10:49 PM
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Joined: May 2008
Posts: 5,399
Aurora, Colorado
451Mopar
master
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master
Joined: May 2008
Posts: 5,399
Aurora, Colorado
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Quote:
I just rebuilt mine last summer I have a billet drum, red racing clutches and ultimate sprag.I have about 750hp.My old trans just had a rebuild kit and shift kit didn't hold up to big hp.
Add Kolene steels with the Alto red clutches.
Check the splines of the low gear set, if they are cracking you will want a steel splined low gear set
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Re: 727 race rebuild question
[Re: 79410aspenrt]
#1740528
01/28/15 12:34 AM
01/28/15 12:34 AM
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Joined: Nov 2006
Posts: 733
jacksonville,FLORIDA
slammedR/T
super stock
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super stock
Joined: Nov 2006
Posts: 733
jacksonville,FLORIDA
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smooth clutches in the rear clutch, linned or waffled clutches in the front clucth(direct) if no LBA valve body then get a billet front(direct) drum. If LBA valve body then a 47RE or BB 727 front drum will work, bolt-in rear sprag,wide cast kickdown band red lined, carbon low reverse band, billet rear servo, BB 727 planets will work. teflon seal ring kit, rear vent with catch can. Also the 727 handbook would be a good idea, it will explain some of the tricks like how to modify the front servo and getting a ported stator support shaft for better feed to the front clutch.
2000 Dakota R/T, 408 magnum, 727, Indy heads 1000cfm 4150 carb, 93 octane fuel. motor; 10.258 @ 132.78 200 shot; 9.262 @ 144.69 racemagnum
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Re: 727 race rebuild question
[Re: WILD BILL]
#1740529
01/28/15 03:31 PM
01/28/15 03:31 PM
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Joined: Oct 2003
Posts: 7,506
Az
Crizila
master
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master
Joined: Oct 2003
Posts: 7,506
Az
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Quote:
If your VB does not have the LBA then I highly recommend getting a billet front drum.
Other than that, not much else special is needed.
Call John at CRT. He will get you hooked up right.
That's what I did with my stock 79 727. It's been a while, but the kit he put together for me ( for a 10 second car) included a steel front drum, bolt in sprag, stouter band link, low drag seals. I already had a LBA valve body. Been trouble free for a long time now. Forgot, added an additional clutch disc for 3rd gear - involved a skinnier snap ring - think the kit had several in it to choose from.
Last edited by Crizila; 01/28/15 03:34 PM.
Fastest 300
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Re: 727 race rebuild question
[Re: Polarapete]
#1740531
01/28/15 04:34 PM
01/28/15 04:34 PM
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Joined: Aug 2012
Posts: 836
Up a holler, down a crick
booger
super stock
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super stock
Joined: Aug 2012
Posts: 836
Up a holler, down a crick
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FWIW, since LBA valve bodies have been mentioned, I thought I'd mention that there's ancillary work to do in order to get that to work if yo have a reverse shifting pattern VB. I'd say exactly what it is, but don't have the sheet that came with mine with me. IIRC there's a couple of holes to drill somewhere.
Last edited by booger; 01/28/15 06:43 PM.
Chasing bears through the woods drunk with a dull hatchet is strongly not advised
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Re: 727 race rebuild question
[Re: booger]
#1740532
01/28/15 06:31 PM
01/28/15 06:31 PM
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Joined: Jan 2003
Posts: 25,877
Rio Linda, CA
John_Kunkel
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 25,877
Rio Linda, CA
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If the forward pattern VB was built from a kit (TF-3, Manual Pack) it is already LBA.
The INTERNET, the MISinformation superhighway
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