Posted By: mac56
Powerglide user Question - 12/23/08 08:08 PM
I would like to change over to a glide this winter and was wondering what internal mods do you feel are necessary for 750hp. in a pull tractor.
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Powerglide user Question
Posted By: Anonymous
Post deleted by Defbob - 12/23/08 08:22 PM
Posted By: mac56
Re: Powerglide user Question - 12/23/08 08:39 PM
Quote:
In a tractor not sure but I run a basically stock p/g with good band and clutches behind a 900 hp Hemi
Stock out and no straight cut gears? What ratio and does the ratio matter to strength?
Posted By: Get-X
Re: Powerglide user Question - 12/23/08 08:55 PM
Quote:
In a tractor not sure but I run a basically stock p/g with good band and clutches behind a 900 hp Hemi
Really? So basically just find a junkyard pg and change the bands and clutches and it's ready to go behind 900hps? No wonder people are changing over
Posted By: Anonymous
Post deleted by Defbob - 12/23/08 09:13 PM
Posted By: turbocolt2.4L
Re: Powerglide user Question - 12/23/08 10:24 PM
must be the 176 gearset.
Posted By: Monte_Smith
Re: Powerglide user Question - 12/23/08 10:54 PM
Quote:Stock stuff will not last in a pull tractor. Those things are basically in a constant state of tire shake. It won't be the power that kills a trans here, it will be the constant hook-no hook of the tires. This will take a good trans. I suggest aftermarket case, straight cut gear set, vasco input and a 10 clutch drum at the min.Quote:Quote:
In a tractor not sure but I run a basically stock p/g with good band and clutches behind a 900 hp Hemi
Stock out and no straight cut gears? What ratio and does the ratio matter to strength?
stock gears
Monte
Posted By: Leon441
Re: Powerglide user Question - 12/23/08 10:58 PM
Fred I don't know how you get away with that.
I broke an aftermarket planetary with my 900HP small block that makes far less torque than your hemi.
I broke an aftermarket planetary with my 900HP small block that makes far less torque than your hemi.
Posted By: Anonymous
Post deleted by Defbob - 12/24/08 12:29 AM
Posted By: MR_P_BODY
Re: Powerglide user Question - 12/24/08 01:04 AM
The glide for my BB has the good input and output
shaft plus alot more inside
shaft plus alot more inside
Posted By: Monte_Smith
Re: Powerglide user Question - 12/24/08 01:13 AM
Quote:Anything can break Leon. I would not read much into the fact that you broke one. So far, out of all the trans that I have sold to guys, I have yet to sell one with a Vasco gear set. Just the standard, straight cut 9310 stuff and have not had a gear set break yet, even behind some blown motors. I have seen stock 1.76s hold up behind some real power, but you never know.
Fred I don't know how you get away with that.
I broke an aftermarket planetary with my 900HP small block that makes far less torque than your hemi.
Monte
Posted By: Bob_Coomer
Re: Powerglide user Question - 12/24/08 01:49 AM
I have heard of way more aftermarket gear sets breaking than stock 1.76 believe it or not.
OK
Will this have a break?
If so depending on what type of break, diff mods needs to be done (dump holes drilled etc.)
This lets the pressure dump off the reverse piston, which makes for a much quicker leave.
Use the good clutches, I used the thin ones about .070 thick compared to .100, which enabled me to get more into the forward clutch drum without milling etc. Which was about 7 in my case, but really depends on the piston style/thickness. Shoot for .075-.100 total clutch pack clearance total in the front drum.
The factory clutch hub, needs to be replaced, the factory is thin pop metal, and isn't wide enough to allow additional clutches.
Also ditch the servo piston for a duel ring setup, I never had any luck with the nylon/Teflon type, I prefer the cast iron ring style.
Get as many clutches as possible in the reverse side when using a Brake (extra Holding) if not running a break, just replace the clutches with same number high quality clutches, its not like your going to be racing in reverse LOL.
Replace the input shaft for a 300M or hard unit, I prefer the 350 turbo spline, better... read more choices, and finding used ones etc.
There is some pump mods that can be done too.
I done some simple mods as these, and I have had good luck using stock 1.76 gear sets. I pulled 1.07 60ft in a heavy dragster (1800-1900+ lbs), although they are light, it still had to take those 6K brake launches.
OK
Will this have a break?
If so depending on what type of break, diff mods needs to be done (dump holes drilled etc.)
This lets the pressure dump off the reverse piston, which makes for a much quicker leave.
Use the good clutches, I used the thin ones about .070 thick compared to .100, which enabled me to get more into the forward clutch drum without milling etc. Which was about 7 in my case, but really depends on the piston style/thickness. Shoot for .075-.100 total clutch pack clearance total in the front drum.
The factory clutch hub, needs to be replaced, the factory is thin pop metal, and isn't wide enough to allow additional clutches.
Also ditch the servo piston for a duel ring setup, I never had any luck with the nylon/Teflon type, I prefer the cast iron ring style.
Get as many clutches as possible in the reverse side when using a Brake (extra Holding) if not running a break, just replace the clutches with same number high quality clutches, its not like your going to be racing in reverse LOL.
Replace the input shaft for a 300M or hard unit, I prefer the 350 turbo spline, better... read more choices, and finding used ones etc.
There is some pump mods that can be done too.
I done some simple mods as these, and I have had good luck using stock 1.76 gear sets. I pulled 1.07 60ft in a heavy dragster (1800-1900+ lbs), although they are light, it still had to take those 6K brake launches.
Posted By: mac56
Re: Powerglide user Question - 12/24/08 02:38 AM
Quote:
I have heard of way more aftermarket gear sets breaking than stock 1.76 believe it or not.
OK
Will this have a break?
If so depending on what type of break, diff mods needs to be done (dump holes drilled etc.)
This lets the pressure dump off the reverse piston, which makes for a much quicker leave.
Use the good clutches, I used the thin ones about .070 thick compared to .100, which enabled me to get more into the forward clutch drum without milling etc. Which was about 7 in my case, but really depends on the piston style/thickness. Shoot for .075-.100 total clutch pack clearance total in the front drum.
The factory clutch hub, needs to be replaced, the factory is thin pop metal, and isn't wide enough to allow additional clutches.
Also ditch the servo piston for a duel ring setup, I never had any luck with the nylon/Teflon type, I prefer the cast iron ring style.
Get as many clutches as possible in the reverse side when using a Brake (extra Holding) if not running a break, just replace the clutches with same number high quality clutches, its not like your going to be racing in reverse LOL.
Replace the input shaft for a 300M or hard unit, I prefer the 350 turbo spline, better... read more choices, and finding used ones etc.
There is some pump mods that can be done too.
I done some simple mods as these, and I have had good luck using stock 1.76 gear sets. I pulled 1.07 60ft in a heavy dragster (1800-1900+ lbs), although they are light, it still had to take those 6K brake launches.
To answer at least one question. We do not use a brake. Just roll the throttle up on the converter sometimes faster than others but never flash or brake the converter.
Why 1.76 instead of 1.82? Is this only if you are using stock gears? I have heard stock output shaft can handle roughly 700 hp.
Posted By: mac56
Re: Powerglide user Question - 12/24/08 02:50 AM
Also I should add we only use low gear. Pull it into to low and full throttle until it won't go any further down the track.
Posted By: TS3303
Re: Powerglide user Question - 12/24/08 03:10 AM
The stock 1.82 is junk, hold a 1.76 and 1.82 next to each other and you will see. On a glide the planetary is the output shaft. My first one was a ATI somewhat high dollar piece that lasted 75 passes before exploding on launch, after beating it out of the trans we rebuilt it at the track with a stock 1.76 someone had. I ran the stock one for another 175 passes at 8.50 in a 2450 lbs car (still good at teardown). I then upgraded to a Hughes killer billet one and have had it in since (8 years?).
Cores. There are two ways to ID a 1.76 or 1.82 planetary trans. The input shafts are different lengths by .25" (14 5/8 & 14 7/8 I think) and the O.D. of the output shafts are different. Sorry I don't remember what they are at the moment but can look it up.
Cores. There are two ways to ID a 1.76 or 1.82 planetary trans. The input shafts are different lengths by .25" (14 5/8 & 14 7/8 I think) and the O.D. of the output shafts are different. Sorry I don't remember what they are at the moment but can look it up.
Posted By: mac56
Re: Powerglide user Question - 12/24/08 03:22 AM
Quote:
The stock 1.82 is junk, hold a 1.76 and 1.82 next to each other and you will see. On a glide the planetary is the output shaft. My first one was a ATI somewhat high dollar piece that lasted 75 passes before exploding on launch, after beating it out of the trans we rebuilt it at the track with a stock 1.76 someone had. I ran the stock one for another 175 passes at 8.50 in a 2450 lbs car (still good at teardown). I then upgraded to a Hughes killer billet one and have had it in since (8 years?).
Cores. There are two ways to ID a 1.76 or 1.82 planetary trans. The input shafts are different lengths by .25" (14 5/8 & 14 7/8 I think) and the O.D. of the output shafts are different. Sorry I don't remember what they are at the moment but can look it up.
Thanks for the good info
Posted By: 5537SG
Re: Powerglide user Question - 12/24/08 03:51 AM
the stock 1.76 seems to be quite strong. I bought a BTE 1.96 or whatever it was, it didnt last one run before all the gears crumbled.
The stock 1.76 worked fine before that, and after.
BTE still advertises them as having "no reported failures" however they warranteed mine but changed it to a 1.80. It still sits on the shelf.
The stock 1.76 worked fine before that, and after.
BTE still advertises them as having "no reported failures" however they warranteed mine but changed it to a 1.80. It still sits on the shelf.
Posted By: TS3303
Re: Powerglide user Question - 12/24/08 04:30 AM
I think some of the aftermarket gears are just too hard and the stock gears act like a rearend Pro Gear a little softer to take the sudden impact of those 6k launches off the brake 
I wish I could find the pics of my ATI set, the gears exploded and locked everything up tight. I let go of the brake and it moved about 1" and stopped dead, glad it was a complete instant failure and didn't hang on till 2nd gear. I don't think there was one gear in that planetary that had all it's teeth still.
I wish I could find the pics of my ATI set, the gears exploded and locked everything up tight. I let go of the brake and it moved about 1" and stopped dead, glad it was a complete instant failure and didn't hang on till 2nd gear. I don't think there was one gear in that planetary that had all it's teeth still.