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727--> Powerglide #2511403
06/21/18 04:57 PM
06/21/18 04:57 PM
Joined: Jan 2005
Posts: 965
Keymar, MD
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DusterKid Offline OP
super stock
DusterKid  Offline OP
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Keymar, MD
For you guys that have switched from a 727 to a powerglide how did it affect your car? Slow down 60', pick up mph, run same et?

Re: 727--> Powerglide [Re: DusterKid] #2511419
06/21/18 05:20 PM
06/21/18 05:20 PM
Joined: Dec 2005
Posts: 2,802
Fulton County, PA
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CMcAllister Offline
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CMcAllister  Offline
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Joined: Dec 2005
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Fulton County, PA
Based on most of the things I see, a Glide is over twice as efficient (less power to operate) than a standard, non-roller 727. And only slightly more efficient than a 904. But it's also lighter. That equates to power reaching the tires and MPH.

The big factor is the low gear ratio. The importance of finding that sweet spot of "not too much, not too little" is overlooked by many people. Whether it will help and by how much depends on your situation.

Typically though, going from a 727 to a 904 with basically the same low gear, which I have done, is worth a tenth or tenth and a half. Going from a 904 to a Glide, it didn't really pick up much. But the consistency and how the car worked in the first 60' was way better, AFTER we got the right low gear in it. It was a turd with the 1.76

Last edited by CMcAllister; 06/21/18 05:21 PM.
Re: 727--> Powerglide [Re: DusterKid] #2511715
06/22/18 12:55 PM
06/22/18 12:55 PM
Joined: Feb 2003
Posts: 237
Pottstown, Pa.
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sg1093 Offline
enthusiast
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Posts: 237
Pottstown, Pa.
My thoughts exactly. I had a small block 70 Dart, and I think the lack of torque was why it wasn't as fast with the powerglide. Went from a 727 to a powerglide with a 1.82 first gear. wasn't faster or more consistant, because it wasn't hitting the tires as hard. 360 ci engine at 3000 lbs, was running NHRA Super Street.

Re: 727--> Powerglide [Re: DusterKid] #2511812
06/22/18 04:40 PM
06/22/18 04:40 PM
Joined: Dec 2005
Posts: 2,802
Fulton County, PA
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CMcAllister Offline
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Fulton County, PA
Yep. I went from quick IF the track was there, to turd like driving away from a stoplight to quick and consistent. All with the same power, just different SLRs.

Re: 727--> Powerglide [Re: CMcAllister] #2512446
06/24/18 02:45 AM
06/24/18 02:45 AM
Joined: Jan 2003
Posts: 2,745
Cedar Lake IN
CRT Offline
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CRT  Offline
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Cedar Lake IN
You can make a 727 or 904 a two speed with a CRT 2nd gear launch trans brake valve body for a lot less then converting to a pg.

Re: 727--> Powerglide [Re: DusterKid] #2512747
06/24/18 09:05 PM
06/24/18 09:05 PM
Joined: Jan 2005
Posts: 3,400
Oakland, MI
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dizuster Offline
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Oakland, MI
If the 1.82 or 1.76 isn't enough for most people, I'm guessing the 1.45 would be a struggle.

I get the really big powered stuff can use less SLR, but leaving in 2nd on a 727 would be REAL soft for most stuff.

Re: 727--> Powerglide [Re: CMcAllister] #2512855
06/25/18 01:24 AM
06/25/18 01:24 AM
Joined: Jan 2003
Posts: 8,516
Frostbitefalls (Rocky&Bullwink...
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gregsdart Offline
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Frostbitefalls (Rocky&Bullwink...
Originally Posted By CMcAllister
Based on most of the things I see, a Glide is over twice as efficient (less power to operate) than a standard, non-roller 727. And only slightly more efficient than a 904. But it's also lighter. That equates to power reaching the tires and MPH.

The big factor is the low gear ratio. The importance of finding that sweet spot of "not too much, not too little" is overlooked by many people. Whether it will help and by how much depends on your situation.

Typically though, going from a 727 to a 904 with basically the same low gear, which I have done, is worth a tenth or tenth and a half. Going from a 904 to a Glide, it didn't really pick up much. But the consistency and how the car worked in the first 60' was way better, AFTER we got the right low gear in it. It was a turd with the 1.76

Finally, an explanation that makes sense.

Re: 727--> Powerglide [Re: CMcAllister] #2512929
06/25/18 10:27 AM
06/25/18 10:27 AM
Joined: Mar 2005
Posts: 496
Stuart FL
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mercman1 Offline
mopar
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Joined: Mar 2005
Posts: 496
Stuart FL
I switched my Hemi GTX from a glide to a 727. I weighed every part Trans, converters flex plates ,drive shafts and don't forget adapter hub. The Glide was 30 lbs lighter, but by the time you put in the longer driveshaft, heavier converter and hub assembly it was a wash. been there!

Re: 727--> Powerglide [Re: CRT] #2512953
06/25/18 11:48 AM
06/25/18 11:48 AM
Joined: Jan 2003
Posts: 11,113
Marion, South Carolina [><]
an8sec70cuda Offline
I Live Here
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Joined: Jan 2003
Posts: 11,113
Marion, South Carolina [><]
Originally Posted By CRT
You can make a 727 or 904 a two speed with a CRT 2nd gear launch trans brake valve body for a lot less then converting to a pg.

iagree This is exactly what I intend to do soon. The 1.45 gear will be soft for something not making a lot of power though.
For what a bulletproof glide will cost me for my car, I'll try one of Cope's transbrakes first.


CHIP
'70 hemicuda street car...8.91 at 150.5 mph w/ 4.10s, 8.97 at 152.5 mph w/ 3.54s so far
'69 road runner 440 w/ Indy SRs
'69 road runner 440-6, 4 speed...Dad's ride
'71 Demon 340 resto project
'06 GMC 2500HD LBZ Duramax...toy hauler
'16 Grand Caravan SXT...baby hauler
Re: 727--> Powerglide [Re: an8sec70cuda] #2513074
06/25/18 03:55 PM
06/25/18 03:55 PM
Joined: Feb 2005
Posts: 943
western pennsylvania
b1dartsport Offline
super stock
b1dartsport  Offline
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Joined: Feb 2005
Posts: 943
western pennsylvania
Put a 999 low 277 gear set in the 904 and second gear is 1.54.


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