Re: 727 vs powerglide
[Re: domingo]
#1378940
01/31/13 12:14 AM
01/31/13 12:14 AM
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Joined: Nov 2004
Posts: 4,330
Lynchburg, VA
Leon441
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master
Joined: Nov 2004
Posts: 4,330
Lynchburg, VA
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I don't know about stronger or cheaper.
That's a relavent statement.
A fairly stock 727 with a good drum that will not blow up with a sprag failure can handle about 600 lbs of torque with no problem. The next step is the gearset. An aftermarket or deisel truck one will withstand about anything. So depending on your skill or cost of your transmission guy you can build a 727 that will withstand any Race Mopar I know of for about $2,000 in parts.
A stock powerglide will handle 600 lbs of torque. Then it is input shaft, planetary, pump, output housing to handle about 800 lbs of torque. Then add more clutches aftermarket case tailhousing. You can easily spend $2,500 in parts.
The powerglide has the same individual clutch area as a 904. In fact the 8 clutch packs are 904 clutches. But, the clutches being smaller take less HP and their are no drums changing directions on the shift. So many argue that powerglides are faster. Depends light car with a wide powerband. Absolutely powerglide. High winding or narrow powerband, heavy car. 727 more gears.
Their is nothing wrong with either transmission if built properly. I run a glide because it is shorter in length. The 727 will not easily fit my chassis modifications. Otherwise that is exactly what would be in my car.
Would not dream of running a 2.94 with a torqueflite. 3.7 maybe. If you don't like a 2.44 first gear. Switch to something else like a 2.28, 2.05 or put a glide in the car. But, a car can be tuned for a 2.44 gear and a rear gear that will make the finish line.
Leon
Career best 8.02 @ 169 at 3050# and 10" tires small block power.
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Re: 727 vs powerglide
[Re: Mopar-Al]
#1378941
01/31/13 01:13 AM
01/31/13 01:13 AM
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Joined: Jan 2008
Posts: 4,254
Canada
WO23Coronet
OP
master
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OP
master
Joined: Jan 2008
Posts: 4,254
Canada
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Quote:
2.94 gear is for an 8 3/4 ? I can usually bust those gears up in 1 or 2 hard launches.
I know a 2.94 is for an 8 3/4, I just used that # for comparison, pretty sure u could get whatever gear set u wanted for a 9" Ford
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Re: 727 vs powerglide
[Re: WO23Coronet]
#1378942
01/31/13 06:27 PM
01/31/13 06:27 PM
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Joined: May 2008
Posts: 902
Mopar Lane,Mississippi
67HEMI
super stock
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super stock
Joined: May 2008
Posts: 902
Mopar Lane,Mississippi
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Southland Dodge did some testing on the V-10 drag pack challenger and they picked up around .3 with a tf over the pg.
'33 Plymouth 5 Window Coupe Blown Aluminum HEMI w/bolt ons (under construction)
'69 Chrysler 300 Convertible 375 HP 440
'71 Plymouth Duster 360 W/EFI (Wife's Ride)
'12 Ram MegaCab Dually 6.7 Cummins
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Re: 727 vs powerglide
[Re: Mopar-Al]
#1378944
01/31/13 11:24 PM
01/31/13 11:24 PM
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Joined: Mar 2012
Posts: 168
Washington State, USA
Winchester 73
member
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member
Joined: Mar 2012
Posts: 168
Washington State, USA
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Quote:
2.94 gear is for an 8 3/4 ? I can usually bust those gears up in 1 or 2 hard launches.
ive heard the dana 61 housings only go as HIGH as 3.08,they make spools for them as well.
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Re: 727 vs powerglide
[Re: Leon441]
#1378945
02/01/13 01:12 AM
02/01/13 01:12 AM
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Joined: Feb 2006
Posts: 2,379
MD
Kevins493
top fuel
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top fuel
Joined: Feb 2006
Posts: 2,379
MD
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Quote:
I don't know about stronger or cheaper.
That's a relavent statement.
A fairly stock 727 with a good drum that will not blow up with a sprag failure can handle about 600 lbs of torque with no problem. The next step is the gearset. An aftermarket or deisel truck one will withstand about anything. So depending on your skill or cost of your transmission guy you can build a 727 that will withstand any Race Mopar I know of for about $2,000 in parts.
A stock powerglide will handle 600 lbs of torque. Then it is input shaft, planetary, pump, output housing to handle about 800 lbs of torque. Then add more clutches aftermarket case tailhousing. You can easily spend $2,500 in parts.
The powerglide has the same individual clutch area as a 904. In fact the 8 clutch packs are 904 clutches. But, the clutches being smaller take less HP and their are no drums changing directions on the shift. So many argue that powerglides are faster. Depends light car with a wide powerband. Absolutely powerglide. High winding or narrow powerband, heavy car. 727 more gears.
Their is nothing wrong with either transmission if built properly. I run a glide because it is shorter in length. The 727 will not easily fit my chassis modifications. Otherwise that is exactly what would be in my car.
Would not dream of running a 2.94 with a torqueflite. 3.7 maybe. If you don't like a 2.44 first gear. Switch to something else like a 2.28, 2.05 or put a glide in the car. But, a car can be tuned for a 2.44 gear and a rear gear that will make the finish line.
Leon
I would add that the converter is usually going to be much more critical on a powerglide as far as the combination goes, and in applications like Comp the 727 has been found to be at least a tenth (seem to remember two) faster due to the narrow powerband. If I was building a BB powered dragster or tube car, I would absolutely go with a glide. It would just be more consistent. If I was running class legal/heads up with a SB or a 99Hemi and had to run an auto (and wasn't tire limited), I would likely go with a 727.
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Re: 727 vs powerglide
[Re: HotRodDave]
#1378946
02/01/13 01:15 AM
02/01/13 01:15 AM
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Joined: Jan 2003
Posts: 5,875
communist bloc of new jersey
jamesc
master
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master
Joined: Jan 2003
Posts: 5,875
communist bloc of new jersey
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Quote:
The guys who claim to run faster with a glide are few and far between and most of them probably would have been better off just getting the proper rear gear in the car. A gear drive for TQ multiplication is more efficient then a slipping converter any day of the week.
it depends on your goals and combination. i bracket race so for me winning rounds is much more important than absolute ET performance.
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Re: 727 vs powerglide
[Re: jamesc]
#1378947
02/01/13 02:49 AM
02/01/13 02:49 AM
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Joined: Nov 2006
Posts: 1,090
north cakalaky
instigator
super stock
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super stock
Joined: Nov 2006
Posts: 1,090
north cakalaky
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A butt load of torque through a 727 with weight behind it seems to be a problem also.....that's why a 1.80 straight cut reid cased glide is sitting on my workbench now.....
65 Barracuda
All aluminum Indy HEMI with some boost!
COMING TO A TRACK NEAR YOU!
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Re: 727 vs powerglide
[Re: instigator]
#1378948
02/01/13 03:17 AM
02/01/13 03:17 AM
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Joined: Jun 2006
Posts: 5,161
CT
GTX MATT
master
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master
Joined: Jun 2006
Posts: 5,161
CT
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My daily driver Lumina had an internal electrical failure in the tranny that sent it into limp mode. 2nd gear starts (with the selector in 1 or 2) and manual shifts to 3rd. I drove it around for a couple weeks before I swapped the tranny out, joking that I had a race Glide in it. I guess since most race cars have manual valve bodies anyway one could build a TF and start in second gear if they really wanted a Glide.  The true answer is probably (without knowing anything about whats out there) that there is much more aftermarket stuff available at a reasonable price for the Glide, and obviously having less gears makes the construction simpler, allowing for more durability. I'd bet its aftermarket though, same reason a 350 is the greatest engine ever and a Ford 9 inch is bulletproof.
Last edited by GTX MATT; 02/01/13 03:21 AM.
Now I need to pin those needles, got to feel that heat
Hear my motor screamin while I'm tearin up the street
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Re: 727 vs powerglide
[Re: Bob_Coomer]
#1378950
02/01/13 03:53 PM
02/01/13 03:53 PM
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Joined: Jul 2012
Posts: 153
Plant city fl
70Dart499
member
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member
Joined: Jul 2012
Posts: 153
Plant city fl
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Wasn't someone working on a trans brake valve body for the 727 that would allow you to use the trans brake in second gear, and this making a 727 a two speed? I was very curious to see if it ever went into production, because I think it would be a great idea, becuase really the only plus to a glide is the fact that it is 2-speed. I run my 727 in only second and third all the time, and I only lose about .10, and the car is more consistent.
1970 Dart Drag Car
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Re: 727 vs powerglide
[Re: jamesc]
#1378952
02/01/13 04:32 PM
02/01/13 04:32 PM
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Joined: Jul 2012
Posts: 153
Plant city fl
70Dart499
member
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member
Joined: Jul 2012
Posts: 153
Plant city fl
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Yes, I know 'glides are lighter, I was talking more from a consistency standpoint than anything else, and I should have been more specific. I'll be honest, I'm putting a transbrake in the car before too long, and its going to be a 'glide, so I didn't mean to sound like I didnt like them.
1970 Dart Drag Car
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