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Re: 727 Upgrades for a Stroker power
[Re: Monte_Smith]
#2149398
09/07/16 07:13 AM
09/07/16 07:13 AM
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Joined: Mar 2006
Posts: 9,860
MI, usa
dvw
master
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master
Joined: Mar 2006
Posts: 9,860
MI, usa
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Once you go to the steel planet, the next thing you break will be the input. Following that will be the output What power level did you see the shafts fail at? Doug
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Re: 727 Upgrades for a Stroker power
[Re: Dragula]
#2149560
09/07/16 12:57 PM
09/07/16 12:57 PM
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Joined: Nov 2004
Posts: 6,890
North Alabama
Monte_Smith
master
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master
Joined: Nov 2004
Posts: 6,890
North Alabama
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I don't think power is the issue, it's weight and torque. My car was 3250 and was capable of high teen 60fts pretty much every pass. I stripped several planets and we put a steel truck unit in there. Likely a dozen passes later it broke the input. After the input change, it made maybe 20 passes and shelled the output.............At that point I was DONE. It got a power glide
I know it's not popular with some, but with the ease of making power these days, better tracks, better tires and the availability of parts and lack thereof for some things. I would be hard pressed to put a 727 in anything with big power these days. CAN it be made to last, maybe........will it be expensive, yes. With the easy availability of aftermarket cases and bells, plus better parts selection and better converters.......does it make much sense to NOT use a glide or 400? Not to me.
Notice I said BIG power. I am NOT advocating every Mopar out there does not need a 727
In the OPs case, not sure how heavy his car is, but at lows 6s in the 1/8, his 727 should be fine. I didn't start shelling parts until I was running mid 5s and the 60fts came around
Last edited by Monte_Smith; 09/07/16 01:07 PM.
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Re: 727 Upgrades for a Stroker power
[Re: Dragula]
#2149570
09/07/16 01:13 PM
09/07/16 01:13 PM
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Joined: Feb 2011
Posts: 4,302
Nebraska
72Swinger
master
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master
Joined: Feb 2011
Posts: 4,302
Nebraska
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I still don't get what a 47/48re has over a 727 that makes them take 1500ft/lb 30psi boost launches in 7500lb trucks, and locked converter shifts to boot. Yeah they cost in the 5-7k range to buy with a billet lockup verter to. Not directed at you Monte but the 47rh/re is to the diesel world what the th400 is to the drag world, is it the cases of the old 727's that are the biggest weak spot at the end of the day?
Last edited by 72Swinger; 09/07/16 01:15 PM.
Mopar to the bone!!!
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Re: 727 Upgrades for a Stroker power
[Re: farmboy]
#2149607
09/07/16 02:13 PM
09/07/16 02:13 PM
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Joined: Feb 2013
Posts: 760
Canada
CTD5.9
super stock
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super stock
Joined: Feb 2013
Posts: 760
Canada
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I have been doing many second gear launches with my TA manual valve bodies, what would be different with Cope's valve body? It's a transbrake that works in second
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Re: 727 Upgrades for a Stroker power
[Re: 72Swinger]
#2149688
09/07/16 03:46 PM
09/07/16 03:46 PM
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Joined: Nov 2004
Posts: 6,890
North Alabama
Monte_Smith
master
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master
Joined: Nov 2004
Posts: 6,890
North Alabama
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I still don't get what a 47/48re has over a 727 that makes them take 1500ft/lb 30psi boost launches in 7500lb trucks, and locked converter shifts to boot. Yeah they cost in the 5-7k range to buy with a billet lockup verter to. Not directed at you Monte but the 47rh/re is to the diesel world what the th400 is to the drag world, is it the cases of the old 727's that are the biggest weak spot at the end of the day? No aftermarket case, limited good parts, limited gear ratios, limited converter cores that can be used, weight. Also very little competing aftermarket and demand for "good" parts, so what is there is high priced
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Re: 727 Upgrades for a Stroker power
[Re: Monte_Smith]
#2149799
09/07/16 06:37 PM
09/07/16 06:37 PM
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Joined: Mar 2006
Posts: 9,860
MI, usa
dvw
master
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master
Joined: Mar 2006
Posts: 9,860
MI, usa
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I don't think power is the issue, it's weight and torque. My car was 3250 and was capable of high teen 60fts pretty much every pass. I stripped several planets and we put a steel truck unit in there. Likely a dozen passes later it broke the input. After the input change, it made maybe 20 passes and shelled the output.............At that point I was DONE. It got a power glide
I know it's not popular with some, but with the ease of making power these days, better tracks, better tires and the availability of parts and lack thereof for some things. I would be hard pressed to put a 727 in anything with big power these days. CAN it be made to last, maybe........will it be expensive, yes. With the easy availability of aftermarket cases and bells, plus better parts selection and better converters.......does it make much sense to NOT use a glide or 400? Not to me.
Notice I said BIG power. I am NOT advocating every Mopar out there does not need a 727
In the OPs case, not sure how heavy his car is, but at lows 6s in the 1/8, his 727 should be fine. I didn't start shelling parts until I was running mid 5s and the 60fts came around I asked because the only failure mine has had is a stripped stock planet. Runs high 1.2X 60, 5.8x 660 @3350. 350 passes. It may be close to the threshold. How close? We'll see. Doug
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Re: 727 Upgrades for a Stroker power
[Re: dvw]
#2149937
09/07/16 09:56 PM
09/07/16 09:56 PM
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Joined: Jan 2004
Posts: 13,247
Mt. Vernon, Ohio
dartman366
I Live Here
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I Live Here
Joined: Jan 2004
Posts: 13,247
Mt. Vernon, Ohio
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note to self  add steel planetary to tranny parts list.
Light travels faster than the speed of sound,,,this is why some people seem bright untill you hear them speak.
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Re: 727 Upgrades for a Stroker power
[Re: dartman366]
#2150233
09/08/16 10:27 AM
09/08/16 10:27 AM
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Joined: Jan 2003
Posts: 2,299
NE Ohio
DoubleD
top fuel
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top fuel
Joined: Jan 2003
Posts: 2,299
NE Ohio
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note to self add steel planetary to tranny parts list. Add this to your list also - 727 Thick Lug Pump Gear Set
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Re: 727 Upgrades for a Stroker power
[Re: Dave Hall]
#2150245
09/08/16 11:04 AM
09/08/16 11:04 AM
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Joined: Sep 2010
Posts: 66
Oklahoma
66 Belvedere
member
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member
Joined: Sep 2010
Posts: 66
Oklahoma
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Dave Smith at ProTrans is the man! Billet input is a good upgrade, A&A has the parts. At some point the 40 year old input will say NO!  This. Dave makes a lot of parts, and has been doing it for a long time. Pro Trans FTW Ray
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Re: 727 Upgrades for a Stroker power
[Re: Dragula]
#2150605
09/08/16 08:22 PM
09/08/16 08:22 PM
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Joined: Jan 2003
Posts: 8,028
Tulsa OK
Bad340fish
master
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master
Joined: Jan 2003
Posts: 8,028
Tulsa OK
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It would be nice to be able to run a trans without a shield or blanket, thats what I get from the aftermarket case idea. A 904 SFI case with a removable bell for SB or BB might actually sell I dunno.
68 Barracuda Formula S 340
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Re: 727 Upgrades for a Stroker power
[Re: Dragula]
#2150836
09/09/16 02:12 AM
09/09/16 02:12 AM
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Joined: Jun 2008
Posts: 577
Arkansas
Adrielp
mopar
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mopar
Joined: Jun 2008
Posts: 577
Arkansas
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Isn't there an input shaft available with GM splines to be able use a GM converter? Don't know the expense but that covers up one disadvantage.
Adriel Paradise
Substation Design Engineer III
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Re: 727 Upgrades for a Stroker power
[Re: Dragula]
#2150838
09/09/16 02:14 AM
09/09/16 02:14 AM
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Joined: Feb 2011
Posts: 4,302
Nebraska
72Swinger
master
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master
Joined: Feb 2011
Posts: 4,302
Nebraska
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The case is what has the holding ability of the bands, one way and all the fore and aft load of the components. The case DOES need to be thicker in these areas to up its load capacity.
Mopar to the bone!!!
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Re: 727 Upgrades for a Stroker power
[Re: DoubleD]
#2150862
09/09/16 07:07 AM
09/09/16 07:07 AM
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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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note to self add steel planetary to tranny parts list. Add this to your list also - 727 Thick Lug Pump Gear Set I bought the pump from CRT with the thick lug gear set and modified support. The sharp machined edges on the thick lug pump gear needed to be massaged a little where the converter slides into the gear. The converter kept hanging up on the edges and would not slide into the gear, so I took the pump apart and slightly chamfered the edge of the pump gear so the converter would engage the gear
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Re: 727 Upgrades for a Stroker power
[Re: farmboy]
#2155677
09/16/16 01:06 PM
09/16/16 01:06 PM
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Joined: Jan 2003
Posts: 13,375
Marion, South Carolina [><]
an8sec70cuda
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 13,375
Marion, South Carolina [><]
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[quote=an8sec70cuda]My 727 has a steel 5 pinion planetary. The aluminum ones will strip the splines out.
Typical bolt in sprag, TA Cheetah RMVB, cast aluminum deep pan, and A&A billet steel drum.
I'd love to have one of Cope's new valvebodies that allow 2nd gear launch. [/quote
I have been doing many second gear launches with my TA manual valve bodies, what would be different with Cope's valve body? Cope @ CRT told me there isn't enough line pressure to make one live for very long doing 2nd gear launches w/ a typical valve body. 
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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