727 for SS hemi
#2467661
03/17/18 10:31 AM
03/17/18 10:31 AM
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Joined: Mar 2009
Posts: 126 kentucky
kyhemi-dart
OP
member
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OP
member
Joined: Mar 2009
Posts: 126
kentucky
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I’m looking at a trans for my SS Hemi dart that should be in the 900 HP range. I’ve listed the details of the trans. Does this sound like a solid set up for what I’ve got? Anything you would change?
“billet input shaft & hub,alum drum,billet servo's,a&a 5 pinion planetary,a&a rear bearing support,a&a reverse pattern valuebody,a&a sprag,wide front band,all roller bearing transmission, spare case, carbon shield”
The current owner has ran it behind a stout hemi and wedge but his car also weighs 2-300# less than ours. Just looking for input, not a trans guy. Thanks
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Re: 727 for SS hemi
[Re: kyhemi-dart]
#2467675
03/17/18 11:21 AM
03/17/18 11:21 AM
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Joined: Jan 2003
Posts: 2,914 A shed in England
Tig
master
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master
Joined: Jan 2003
Posts: 2,914
A shed in England
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Over 800ft/lb ? I would go for a heavy duty/billet O/P shaft as well.
'74 Challenger..9.46 @ 145.9 1/4, 6.001 @ 118 1/8 so far. 4023lb !!! # N/A, Marsh performance 655ci, Indy Maxx, T/R, Indy 600-13 X's, Street legal, pump gas, full interior, Cal-Tracs, mufflers, 3:73's and real 10.5 radials. 9.51 @ 142.4 1/4, 6.003 @ 114 1/8 with our old mule KB, 572-13, 580 wedge. RHD '68 Barracuda Fastback 323ci street/strip. Best ET 13.88 @ 99.03
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Re: 727 for SS hemi
[Re: kyhemi-dart]
#2467677
03/17/18 11:27 AM
03/17/18 11:27 AM
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Joined: Mar 2006
Posts: 9,813 MI, usa
dvw
master
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master
Joined: Mar 2006
Posts: 9,813
MI, usa
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Mine runs 9.0-9.1@3350lbs. Just took it apart for inspection. Trans itself has over 600 passes. Currently at 350 passes. The only new parts this go round were a stator support, 2 rings and a filter. What parts are stock; case,pump,input & output shafts,3 pin planet carriers,and servos. Frictions and bands still look nearly new. What parts are modified; lightened sun shell,aluminum drums, aluminum rear clutch carrier, A&A super sprag, torington bearings. I would definitely run the steel front planet carrier if using a brake. I have damaged a stock one, but only one (no trans brake). Current stock piece working fine. If you run a sleeved aluminum front drum I would try Teflon rings on the stator support. Mine is not sleeved so steel rings must be run. The check-up revealed a damage stator support in the rear ring groove along with a ring that was half thickness. Red solid band, 5 thin smooth Alto frictions/Kolene steels in the high clutch. 15 springs set at .075". Rear frictions and steels are stock parts, 3.8 lever, early servo with inner and outer springs. It runs a old Turbo action rev manual valve body. We also run stock input/outputs in Dizusters turbo car with a brake. Close to 850hp@3750lbs on radials. It has broke a aftermarket drive shaft, pinion shaft in the rear axle, but never a trans part outside of stripping a stock front planet. You can build a reliable unit yourself. Doug
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Re: 727 for SS hemi
[Re: kyhemi-dart]
#2467683
03/17/18 11:50 AM
03/17/18 11:50 AM
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Joined: Jan 2004
Posts: 1,468 N.Y.
sixpacksteve
pro stock
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pro stock
Joined: Jan 2004
Posts: 1,468
N.Y.
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900HP with a 727. Good Luck!
Hell Hath No Fury Like Mine
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Re: 727 for SS hemi
[Re: sixpacksteve]
#2467692
03/17/18 12:11 PM
03/17/18 12:11 PM
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Joined: Mar 2006
Posts: 9,813 MI, usa
dvw
master
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master
Joined: Mar 2006
Posts: 9,813
MI, usa
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900HP with a 727. Good Luck! Mines pretty close to 900. Have you broke one at this level? If so what part? By building my own I have paid attention to clearances, wear, and failures. Then adjust as necessary. It gets an easy 100 passes a year, not just the occasional blast. Going on year 6. Every automatic car I've raced since the 80's has had a 727. Only hard part failures I've ever had are a stripped front planet, worn aluminum clutch carrier, reaction shaft worn. Doug
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Re: 727 for SS hemi
[Re: kyhemi-dart]
#2467751
03/17/18 03:01 PM
03/17/18 03:01 PM
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Joined: Jan 2003
Posts: 11,705 Portage,michigan
B3422W5
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 11,705
Portage,michigan
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Grew up on route 222 in Glendale, many moons ago
69 Dart GTS A4 Silver All steel, flat factory hood, 3360race weight 418 BPE factory replacement headed stroker, 565 lift solid cam Best so far, 10.40 @127 1/4 1.41 best 60 foot 6.60 at 103.90 1/8
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Re: 727 for SS hemi
[Re: kyhemi-dart]
#2467760
03/17/18 03:26 PM
03/17/18 03:26 PM
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Joined: Jan 2003
Posts: 25,720 Rio Linda, CA
John_Kunkel
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 25,720
Rio Linda, CA
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“billet input shaft & hub,alum drum,billet servo's,a&a 5 pinion planetary,a&a rear bearing support,a&a reverse pattern valuebody,a&a sprag,wide front band,all roller bearing transmission, spare case, carbon shield”
If the VB isn't LBA, I'd definitely upgrade to one.
The INTERNET, the MISinformation superhighway
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Re: 727 for SS hemi
[Re: kyhemi-dart]
#2467770
03/17/18 04:10 PM
03/17/18 04:10 PM
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Joined: Dec 2005
Posts: 11,484 Fulton County, PA
CMcAllister
Mr. Helpful
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Mr. Helpful
Joined: Dec 2005
Posts: 11,484
Fulton County, PA
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If you want top shelf stuff, you're going to spend 7-8K plus the converter. Less if you just want something to function and live. Either way, if I didn't know my way around one, I would talk to one of the shops that do them everyday. You can throw some good parts in one, get it put together pretty close and do OK for most applications, but you're in a little bit different situation depending on how up-to-date your combination is.
If the results don't match the theory, change the theory.
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Re: 727 for SS hemi
[Re: dvw]
#2467888
03/17/18 10:34 PM
03/17/18 10:34 PM
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Joined: Jan 2004
Posts: 1,468 N.Y.
sixpacksteve
pro stock
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pro stock
Joined: Jan 2004
Posts: 1,468
N.Y.
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Doug, i glad you had great luck. i've been thru aleast a dozen 727 trans, i have 200 less HP and a coan trans now. has been rebuilt several times. I personally believe if you go more than 600+hp 727 Not the way. Im happy for the guys that have been.
Hell Hath No Fury Like Mine
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Re: 727 for SS hemi
[Re: sixpacksteve]
#2467895
03/17/18 10:48 PM
03/17/18 10:48 PM
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Joined: Jan 2005
Posts: 2,540 Milwaukee WI
TRENDZ
master
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master
Joined: Jan 2005
Posts: 2,540
Milwaukee WI
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900HP with a 727. Good Luck! 1100 hp in a 3700lb car for me. A&A built 727 with a Dynamic converter. Had $5200 into trans/ converter. Had two failures. one transbrake solenoid, and broke a tailshaft housing when a rear end broke. Very trouble free considering the power and weight. Guessing around 200 passes before selling the car.
"use it 'till it breaks, replace as needed"
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Re: 727 for SS hemi
[Re: sixpacksteve]
#2467920
03/17/18 11:53 PM
03/17/18 11:53 PM
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Joined: Dec 2006
Posts: 3,395 Pa
Hot 340
master
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master
Joined: Dec 2006
Posts: 3,395
Pa
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Doug, i glad you had great luck. i've been thru aleast a dozen 727 trans, i have 200 less HP and a coan trans now. has been rebuilt several times. I personally believe if you go more than 600+hp 727 Not the way. Im happy for the guys that have been. Someone needs a new tranny guy.
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Re: 727 for SS hemi
[Re: Hot 340]
#2467922
03/17/18 11:56 PM
03/17/18 11:56 PM
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Joined: Mar 2008
Posts: 764 NW Pa.
KD800X
super stock
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super stock
Joined: Mar 2008
Posts: 764
NW Pa.
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Doug, i glad you had great luck. i've been thru aleast a dozen 727 trans, i have 200 less HP and a coan trans now. has been rebuilt several times. I personally believe if you go more than 600+hp 727 Not the way. Im happy for the guys that have been. Someone needs a new tranny guy. I agree! I know guys going 8.60's in full body cars with a 727's.
Last edited by KD800X; 03/18/18 12:00 AM.
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Re: 727 for SS hemi
[Re: kyhemi-dart]
#2468019
03/18/18 10:29 AM
03/18/18 10:29 AM
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Joined: Jan 2003
Posts: 2,914 A shed in England
Tig
master
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master
Joined: Jan 2003
Posts: 2,914
A shed in England
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Almost 950ft/lb here. Only time it's broke has been when we took some teeth off the ring gear (Dana 60). Broke the O/P shaft and rolled the sprag. It's got a lot of aftermarket stuff inside, nothing lightened just all the H/D steel stuff you can get and has worked great, although now I've probably jinxed it
'74 Challenger..9.46 @ 145.9 1/4, 6.001 @ 118 1/8 so far. 4023lb !!! # N/A, Marsh performance 655ci, Indy Maxx, T/R, Indy 600-13 X's, Street legal, pump gas, full interior, Cal-Tracs, mufflers, 3:73's and real 10.5 radials. 9.51 @ 142.4 1/4, 6.003 @ 114 1/8 with our old mule KB, 572-13, 580 wedge. RHD '68 Barracuda Fastback 323ci street/strip. Best ET 13.88 @ 99.03
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Re: 727 for SS hemi
[Re: Hot 340]
#2468113
03/18/18 02:38 PM
03/18/18 02:38 PM
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Joined: Aug 2003
Posts: 43,095 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,095
Bend,OR USA
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Doug, i glad you had great luck. i've been thru aleast a dozen 727 trans, i have 200 less HP and a coan trans now. has been rebuilt several times. I personally believe if you go more than 600+hp 727 Not the way. Im happy for the guys that have been. Someone needs a new tranny guy. Who knows what used parts have been through before the average tranny builder reuses them I like new good race parts from Dave Smith in all of my all out race trannys that he builds for me
Last edited by Cab_Burge; 03/18/18 02:38 PM.
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: 727 for SS hemi
[Re: kyhemi-dart]
#2468520
03/19/18 11:47 AM
03/19/18 11:47 AM
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Joined: Jan 2003
Posts: 13,345 Marion, South Carolina [><]
an8sec70cuda
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 13,345
Marion, South Carolina [><]
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I'm at about 1100 hp w/ a 727 in a 3900 lb car. 8.90s at 150 mph. Billet steel drum, TA transbrake (no LBA), A&A 5 pinion planetary, bolt in sprag, cast deep pan, your normal good clutches, etc. and that's it. The rest is stock stuff. Knock on wood, it's been good so far.
CHIP '70 hemicuda, 575" Hemi, 727, Dana 60 '69 road runner, 440-6, 18 spline 4 speed, Dana 60 '71 Demon, 340, low gear 904, 8.75 '73 Chrysler New Yorker, 440, 727, 8.75 '90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt '06 GMC 2500HD LBZ Duramax
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Re: 727 for SS hemi
[Re: A727Tflite]
#2468569
03/19/18 01:42 PM
03/19/18 01:42 PM
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Joined: Mar 2006
Posts: 9,813 MI, usa
dvw
master
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master
Joined: Mar 2006
Posts: 9,813
MI, usa
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That's half the battle building a good trans - knowing what's good and what's not. Guys can buy the "build a trans" book but that only gets it assembled. Using parts on the verge of failure only gets you limited life - guys that know what to look for don't use those parts. Starting with a good core takes a lot of risk out of the build.
Exactly. There is a difference between a builder and aN assembler. This stuff is old. Some wear in the sealing areas, where rotating parts ride, etc. Most of the time the stuff us pretty good, but not always. Mine needed a reaction shaft support this freshen. Not broke, just worn in the sealing ring land. Doug
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Re: 727 for SS hemi
[Re: dvw]
#2468950
03/20/18 07:52 AM
03/20/18 07:52 AM
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Joined: Aug 2008
Posts: 4,064 Mo.
racerx
master
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master
Joined: Aug 2008
Posts: 4,064
Mo.
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That's half the battle building a good trans - knowing what's good and what's not. Guys can buy the "build a trans" book but that only gets it assembled. Using parts on the verge of failure only gets you limited life - guys that know what to look for don't use those parts. Starting with a good core takes a lot of risk out of the build.
Exactly. There is a difference between a builder and aN assembler. This stuff is old. Some wear in the sealing areas, where rotating parts ride, etc. Most of the time the stuff us pretty good, but not always. Mine needed a reaction shaft support this freshen. Not broke, just worn in the sealing ring land. Doug ..100% I have a few freshen under my belt (1 727,1 46h)both with good cores. I'm no expert for sure. I guess I out.
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Re: 727 for SS hemi
[Re: kyhemi-dart]
#2469445
03/20/18 11:31 PM
03/20/18 11:31 PM
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Joined: May 2008
Posts: 984 San Diego CA
65 Hemi
super stock
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super stock
Joined: May 2008
Posts: 984
San Diego CA
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Pro Trans vote here. My is behind a 605” Hemi in a all steel 65 Coronet. Very happy with it.
Doug
MOPAR or NO CAR!!! 1965 Dodge Coronet soon a 6.1 Hemi with a Magnson blower 810 hp on pump gas 1964 Dodge Polara 582" Indy alum Block 426-1RA heads, 1933 Plymouth PE all Steel, LT1 4L60E 1959 Plymouth Savoy 33,000 mile survivor Old cars are never done. They are ongoing projects!
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Re: 727 for SS hemi
[Re: cudaman1969]
#2469460
03/20/18 11:54 PM
03/20/18 11:54 PM
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Joined: Aug 2003
Posts: 1,312 Charlotte, NC
LSP
pro stock
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pro stock
Joined: Aug 2003
Posts: 1,312
Charlotte, NC
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Back in the 60s early 70s most all funny cars used TFs, how much HP did a blown nitro Hemi make then? They called them torchflites back then too lol. I'd say about 2000hp back then
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