Re: Another Kablooey 727
[Re: CMcAllister]
#3120102
02/08/23 10:03 PM
02/08/23 10:03 PM
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Joined: Feb 2015
Posts: 2,080 CA
crackedback
top fuel
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top fuel
Joined: Feb 2015
Posts: 2,080
CA
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I made a guy pull a 904 and bring it to me once. He had broken a rear, fixed it, and was driving the car around on the street. Everything seemed okay and it was going to the track. I insisted he pull it.
Half of the springs were mashed flat by the rollers when the rear broke. The rollers were loose in the assembly. The other half were still functioning enough to drive the car around. It would not have survived the first hit. You need a high rpm engine to blow up an OEM 904 drum. It's a non issue.
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Re: Another Kablooey 727
[Re: crackedback]
#3120104
02/08/23 10:07 PM
02/08/23 10:07 PM
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Joined: Aug 2003
Posts: 43,257 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,257
Bend,OR USA
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How high is high RPM? I'm getting ready to build a 1965 Valiant SB stroker turbo car with a 904 in it, I'll probably have Pro Trans build a 904 tranny for me, but it would be nice to know what RPM the 904 drums are sensitive to
Last edited by Cab_Burge; 02/08/23 10:08 PM.
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: Another Kablooey 727
[Re: Cab_Burge]
#3120119
02/08/23 11:23 PM
02/08/23 11:23 PM
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Joined: Dec 2005
Posts: 11,645 Fulton County, PA
CMcAllister
Mr. Helpful
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Mr. Helpful
Joined: Dec 2005
Posts: 11,645
Fulton County, PA
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How high is high RPM? I'm getting ready to build a 1965 Valiant SB stroker turbo car with a 904 in it, I'll probably have Pro Trans build a 904 tranny for me, but it would be nice to know what RPM the 904 drums are sensitive to I've never heard of it happening. But I also want to avoid breaking a trans on the starting line.
If the results don't match the theory, change the theory.
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Re: Another Kablooey 727
[Re: Blusmbl]
#3120169
02/09/23 09:07 AM
02/09/23 09:07 AM
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Joined: Jan 2022
Posts: 140 Connellsville
71Demon528
member
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member
Joined: Jan 2022
Posts: 140
Connellsville
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I wonder how long that sprag had been hurt, or if he did the damage on the first burnout in 1st gear where it seemed like he pedaled it and also shifted to second.
That's my worst nightmare with a non-LBA valve body. I don't do first gear burnouts but it still worries me.
Can a non-LBA valve body be replaced with an LBA valve body without any other changes, or is it best to pull the trans when you swap them? You should be able to swap a non LBA valve body with a LBA valve body with no other changes.
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Re: Another Kablooey 727
[Re: JohnRR]
#3120176
02/09/23 09:48 AM
02/09/23 09:48 AM
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Joined: Jan 2003
Posts: 8,174 Plymouth, MI
Blusmbl
master
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master
Joined: Jan 2003
Posts: 8,174
Plymouth, MI
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71Demon- thanks. I need to start collecting 727 parts, have seen too many of these and I'm worried about mine. Crackedback.... LOL! good point, at least ours scatter when the car isn't going to end up in the wall. listening to the guy it sounded like he saw he put it into manual low and shifted to second , at least he thought he did that .
I'm still trying to figure out how the trans shifted it self into park after it went boom with the shift linkage ripped off. That makes sense, the manual low burnouts seem like bad news, especially with that stock drum! Maybe when parts scattered, the drum hit the shift linkage just right and pulled it?
'18 Ford Raptor, random motorcycles, 1968 Plymouth Fury III - 11.37 @ 118
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Re: Another Kablooey 727
[Re: Blusmbl]
#3120209
02/09/23 12:07 PM
02/09/23 12:07 PM
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Joined: Jan 2003
Posts: 75,080 U.S.S.A.
JohnRR
I Win
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I Win
Joined: Jan 2003
Posts: 75,080
U.S.S.A.
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71Demon- thanks. I need to start collecting 727 parts, have seen too many of these and I'm worried about mine. Crackedback.... LOL! good point, at least ours scatter when the car isn't going to end up in the wall. listening to the guy it sounded like he saw he put it into manual low and shifted to second , at least he thought he did that .
I'm still trying to figure out how the trans shifted it self into park after it went boom with the shift linkage ripped off. That makes sense, the manual low burnouts seem like bad news, especially with that stock drum! Maybe when parts scattered, the drum hit the shift linkage just right and pulled it? A manual low burnout with a stock type valvebody will apply the low band so it technically should not hurt the sprag because the sprag isn't really holding the rear drum from spinning ... if the band is adjusted properly ... With that in mind when the trans in manual low it is the furthest from being in park but the explosion probably ripped the park rod off the VB and with it pulled out of position into park the trans will go ... as far as parts you need to be safe , it's really just 1 , but I would spend the extra and get 2 ... Billet front drum is a must , and an A+A SUPER Sprag , it has more rollers and can't easily be rolled over , if at all.
running up my post count some more .
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Re: Another Kablooey 727
[Re: JohnRR]
#3120211
02/09/23 12:19 PM
02/09/23 12:19 PM
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Joined: Jan 2011
Posts: 15,915 Central Florida
larrymopar360
Stud Muffin
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Stud Muffin
Joined: Jan 2011
Posts: 15,915
Central Florida
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The internet, youtube, etc. has brought about so many people who believe they have talent, are funny or have some entertainment value of some sort and need to put it out there for everyone to see. All these Roadkill, Last Stop Garage, Azz Monkey Garage etc. wannabes. This trans was probably rigged to do that for the video.
Facts are stubborn things.
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Re: Another Kablooey 727
[Re: larrymopar360]
#3120401
02/10/23 08:37 AM
02/10/23 08:37 AM
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Joined: Jan 2003
Posts: 75,080 U.S.S.A.
JohnRR
I Win
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I Win
Joined: Jan 2003
Posts: 75,080
U.S.S.A.
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The internet, youtube, etc. has brought about so many people who believe they have talent, are funny or have some entertainment value of some sort and need to put it out there for everyone to see. All these Roadkill, Last Stop Garage, Azz Monkey Garage etc. wannabes. This trans was probably rigged to do that for the video. Did you see the hole in the floor and the trans fliud on the drivers side window ???? If it was rigged for that it would have had a blanket on it , only an idiot would rig something like that and then get in it and make it go boom.
running up my post count some more .
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Re: Another Kablooey 727
[Re: JohnRR]
#3120419
02/10/23 10:48 AM
02/10/23 10:48 AM
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Joined: May 2019
Posts: 6,299 nowhere
Sniper
master
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master
Joined: May 2019
Posts: 6,299
nowhere
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Did you see the hole in the floor and the trans fliud on the drivers side window ???? If it was rigged for that it would have had a blanket on it , only an idiot would rig something like that and then get in it and make it go boom.
World is full of idiots
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Re: Another Kablooey 727
[Re: Sniper]
#3120425
02/10/23 11:37 AM
02/10/23 11:37 AM
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Joined: Jan 2004
Posts: 4,576 Motor City
6PKRTSE
master
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master
Joined: Jan 2004
Posts: 4,576
Motor City
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Been racing my whole life since 16 and have never grenaded a torque flight. Yes, I have broken converters, front pump seals, lost second gear a couple of times but never had one explode. Just build them with good parts.
1963 Belvedere 440 Max Wedge Tribute 1970 Charger R/T S.E. 440 Six Pack 1970 Challenger R/T, 528 Hemi 1970 Charger 500 S.E. 440 4 BBL 1970 Plymouth Road Runner 383 1974 Chrysler New Yorker 440 1996 2500 RAM 488 V-10 4X4 2004 3500 Dually Cummins 4x4 2012 Challenger R/T Classic.
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Re: Another Kablooey 727
[Re: Scully]
#3120463
02/10/23 02:30 PM
02/10/23 02:30 PM
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Joined: Mar 2011
Posts: 3,089 Michigan
A727Tflite
master
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master
Joined: Mar 2011
Posts: 3,089
Michigan
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You can feel and hear a healthy sprag from a damaged one pretty easily by turning the driveshaft with your hands but if possible it's certainly a good idea to pull the trans. This method will certainly bite you in the a$$. Eventually. There are a few failure modes - bad springs and rollers are one.
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Re: Another Kablooey 727
[Re: JohnRR]
#3120466
02/10/23 02:41 PM
02/10/23 02:41 PM
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Joined: Jan 2003
Posts: 8,174 Plymouth, MI
Blusmbl
master
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master
Joined: Jan 2003
Posts: 8,174
Plymouth, MI
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Billet front drum is a must , and an A+A SUPER Sprag , it has more rollers and can't easily be rolled over , if at all. Awesome, thanks. I need to start ordering parts. I assume the higher the rpm that it lets go in 1st gear, the worse the shrapnel is! Also agree, there is no way that was staged. And, at least Tony offered to help him rebuild his spare or use a trans he had in the shop.
'18 Ford Raptor, random motorcycles, 1968 Plymouth Fury III - 11.37 @ 118
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Re: Another Kablooey 727
[Re: 6PKRTSE]
#3120470
02/10/23 03:00 PM
02/10/23 03:00 PM
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Joined: Dec 2005
Posts: 11,645 Fulton County, PA
CMcAllister
Mr. Helpful
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Mr. Helpful
Joined: Dec 2005
Posts: 11,645
Fulton County, PA
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Been racing my whole life since 16 and have never grenaded a torque flight. Yes, I have broken converters, front pump seals, lost second gear a couple of times but never had one explode. Just build them with good parts. Blowing up a 727 is kind of like shooting someone accidentally. A number of mistakes and broken rules have to happen first. But it happens, Second gear burnouts. Take it out and look at it if something in the driveline breaks under power in low gear, regardless what kind of valve body is in it. Good front drum. Miss one. Probably okay. Miss a few, better have a shield on it.
If the results don't match the theory, change the theory.
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Re: Another Kablooey 727
[Re: A727Tflite]
#3120472
02/10/23 03:07 PM
02/10/23 03:07 PM
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Joined: Dec 2005
Posts: 11,645 Fulton County, PA
CMcAllister
Mr. Helpful
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Mr. Helpful
Joined: Dec 2005
Posts: 11,645
Fulton County, PA
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You can feel and hear a healthy sprag from a damaged one pretty easily by turning the driveshaft with your hands but if possible it's certainly a good idea to pull the trans. This method will certainly bite you in the a$$. Eventually. There are a few failure modes - bad springs and rollers are one. Driving it around, functioning and seeming to be okay is not a valid test. Having half the springs smashed will certainly change how it feels when spinning the output shaft. But I'm not going to trust that one either. Take it out and look at it, or roll the dice.
If the results don't match the theory, change the theory.
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Re: Another Kablooey 727
[Re: CMcAllister]
#3120500
02/10/23 04:36 PM
02/10/23 04:36 PM
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Joined: Mar 2011
Posts: 3,089 Michigan
A727Tflite
master
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master
Joined: Mar 2011
Posts: 3,089
Michigan
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You can feel and hear a healthy sprag from a damaged one pretty easily by turning the driveshaft with your hands but if possible it's certainly a good idea to pull the trans. This method will certainly bite you in the a$$. Eventually. There are a few failure modes - bad springs and rollers are one. Driving it around, functioning and seeming to be okay is not a valid test. Having half the springs smashed will certainly change how it feels when spinning the output shaft. But I'm not going to trust that one either. Take it out and look at it, or roll the dice. Correct. The springs and rollers are only part of the equation. Propelling functioning and sounding on jack stands isn’t a test and driving seemingly ok isn’t either.
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Re: Another Kablooey 727
[Re: JohnRR]
#3120503
02/10/23 05:04 PM
02/10/23 05:04 PM
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Joined: Jan 2011
Posts: 15,915 Central Florida
larrymopar360
Stud Muffin
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Stud Muffin
Joined: Jan 2011
Posts: 15,915
Central Florida
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The internet, youtube, etc. has brought about so many people who believe they have talent, are funny or have some entertainment value of some sort and need to put it out there for everyone to see. All these Roadkill, Last Stop Garage, Azz Monkey Garage etc. wannabes. This trans was probably rigged to do that for the video. Did you see the hole in the floor and the trans fliud on the drivers side window ???? If it was rigged for that it would have had a blanket on it , only an idiot would rig something like that and then get in it and make it go boom. You said it not me. I don't know. Like I wrote, I guess I'm strange. I'm also suspicious of most things internet and very tired of all the "car people" that have come out of the woodwork and found their way to the internet and tv. A great majority are not entertaining to ME. Fake drama, not funny as they seem to think they are, and just plain dumb. Maybe they did destroy a 727. That doesn't make it worthy of youtube or whatever. Hey, that's just ME and my opinion which is not worth a nickle. I wish Wayne Carini did Mopars. I could watch him all day long.
Facts are stubborn things.
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