Re: For those "well my tranny never blew up" fools...
[Re: CMcAllister]
#2979650
10/29/21 04:12 PM
10/29/21 04:12 PM
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Joined: Jan 2004
Posts: 8,660 fredericksburg,va
cudaman1969
master
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master
Joined: Jan 2004
Posts: 8,660
fredericksburg,va
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Low band apply valve body and a billet drum cures this. That's all it takes. And pull it and check/fix it if you break anything in the driveline under power. And no low gear burnouts. The sky is falling The sky is falling. Everything will break Correction. Everything can break. But there are simple, well known steps to take that can prevent it or stop it from being catastrophic. Of course there are ways, number one rule is how a burnout is done. I’ve always started in first gear, thousands of times. All the mopar guys I know do it too. Here’s the answer, AFTER the car comes out of the water STOP and put it in first gear, left foot on brake right foot on gas, give some gas to SET the spragg, if it’s broke or weak you’ll feel it. No chirps or dry hops, get in the beams. After the burnout Do not ever go straight to the line, then you’re in a crap shoot. It’s all about understanding why a part breaks. Buying the best parts still won’t keep some from rolling over that spragg, they’re the ones who need it. Every trans expert on here knows when that spragg freewheels (axel-gear break, driveshaft-u-joint) it has a big chance of breaking.
Last edited by cudaman1969; 10/29/21 04:13 PM.
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Re: For those "well my tranny never blew up" fools...
[Re: GY3]
#2979651
10/29/21 04:14 PM
10/29/21 04:14 PM
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Joined: Dec 2005
Posts: 12,322 Fulton County, PA
CMcAllister
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Mr. Helpful
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Mr. Helpful
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Posts: 12,322
Fulton County, PA
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Interesting... So I'm a fool because "my tranny has never blew up"? If you use that as justification to not do the simple things to prevent that stock front drum from disintegrating and tearing up the car, yes.
If the results don't match the theory, change the theory.
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Re: For those "well my tranny never blew up" fools...
[Re: CMcAllister]
#2979653
10/29/21 04:21 PM
10/29/21 04:21 PM
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Joined: Dec 2005
Posts: 12,322 Fulton County, PA
CMcAllister
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Fulton County, PA
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904 roller clutches fail just the same. The stock 904 drum won't disintegrate - the critical speed necessary is just not achievable.
The heavy stock 727 drum will come apart at ~12.5 or 13K or so. With a 2.45 low. that's about 5000 engine RPM and a failed roller clutch.
If the results don't match the theory, change the theory.
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Re: For those "well my tranny never blew up" fools...
[Re: CMcAllister]
#2979656
10/29/21 04:38 PM
10/29/21 04:38 PM
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Joined: Dec 2013
Posts: 4,806 Wichita
GY3
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master
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Wichita
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Interesting... So I'm a fool because "my tranny has never blew up"? If you use that as justification to not do the simple things to prevent that stock front drum from disintegrating and tearing up the car, yes. Have low band apply valvebody, never do burnouts in 1st, etc.
'63 Dodge 330
11.19 @ 121 mph Pump gas, n/a, through the mufflers on street tires with 3.54's. 3,600 lbs.
9.92 @ 135mph with a 350 shot of nitrous and 93 octane pump. 1.43 60 ft. 3,750 lbs.
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Re: For those "well my tranny never blew up" fools...
[Re: justinp61]
#2979659
10/29/21 04:49 PM
10/29/21 04:49 PM
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Joined: Mar 2003
Posts: 9,113 Rogue River, OR
Jeremiah
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Rogue River, OR
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I think the important lesson here is to use a manual transmission.
At least I wasn't the first one to say in this thread : D
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Re: For those "well my tranny never blew up" fools...
[Re: Jeremiah]
#2979665
10/29/21 05:05 PM
10/29/21 05:05 PM
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Joined: Jan 2003
Posts: 3,849 N.E. Ohio
6bblFLASH
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master
Joined: Jan 2003
Posts: 3,849
N.E. Ohio
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I think the important lesson here is to use a manual transmission.
At least I wasn't the first one to say in this thread : D .👍👍👍 Amen
70` Cuda`,440 6BBL Jerico,Dana 4.56 Still on 93 Pump Gas 9.87 @ 136/1.31-60ft.`09 Mopar Nationals PASSON PERFORMANCE "Stick-Shift" Champ! 2013 StickShift Challenge Winner@ Mopar Nationals!
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Re: For those "well my tranny never blew up" fools...
[Re: 6bblFLASH]
#2979669
10/29/21 05:17 PM
10/29/21 05:17 PM
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Joined: Mar 2003
Posts: 2,541 PA
moparacer
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master
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PA
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Great thread.... I always call them "peg leg" tranny's. Always joked lots of old timers who raced 727s walking around with peg legs.... If you break the rear or driveshaft you better pull the trans apart. Everyone always says "yea but I drove it around and it shifted fine...."
67 Barracuda street/bracket car 11.27-119 68 Dart 502 BB 8.70s-152 414 cid SB Dragster 7.65-174
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Re: For those "well my tranny never blew up" fools...
[Re: moparacer]
#2979688
10/29/21 06:41 PM
10/29/21 06:41 PM
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Joined: Dec 2005
Posts: 12,322 Fulton County, PA
CMcAllister
OP
Mr. Helpful
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OP
Mr. Helpful
Joined: Dec 2005
Posts: 12,322
Fulton County, PA
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Great thread.... I always call them "peg leg" tranny's. Always joked lots of old timers who raced 727s walking around with peg legs.... If you break the rear or driveshaft you better pull the trans apart. Everyone always says "yea but I drove it around and it shifted fine...." I have related the story before, but the last one I saw, the guy was going to take it to the track. He had fixed a broken rear and was driving around on the street. Called and asked me what I thought. I made him take it out. Half the springs were crushed and the rollers just rattling around loose in there. The other half were holding well enough to drive the car. Would not have survived the first hit. 904. Don't know if it was a LBA VB. Moving off the spot is not confirmation that the roller clutch is okay.
If the results don't match the theory, change the theory.
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Re: For those "well my tranny never blew up" fools...
[Re: Jeremiah]
#2979718
10/29/21 09:05 PM
10/29/21 09:05 PM
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Joined: Dec 2004
Posts: 10,612 Rittman Ohio
fourgearsavoy
I Live Here
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I Live Here
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Posts: 10,612
Rittman Ohio
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I think the important lesson here is to use a manual transmission.
At least I wasn't the first one to say in this thread : D Even if you do scatter a manual transmission most of the parts just clunk around inside the case and make a hell of a noise Gus
64 Plymouth Savoy 493 Indy EZ's by Nick at Compu-Flow 5-Speed Richmond faceplate Liberty box Dana 60
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Re: For those "well my tranny never blew up" fools...
[Re: fourgearsavoy]
#2979729
10/29/21 09:16 PM
10/29/21 09:16 PM
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Joined: Jan 2003
Posts: 20,335 Park Forest, IL
slantzilla
Too Many Posts
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Too Many Posts
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Posts: 20,335
Park Forest, IL
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Unless the clutch disc decides to play chop saw.......
"Everybody funny, now you funny too."
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Re: For those "well my tranny never blew up" fools...
[Re: DrCharles]
#2979758
10/29/21 10:58 PM
10/29/21 10:58 PM
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Joined: Aug 2003
Posts: 43,748 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,748
Bend,OR USA
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I saw Bob Lambeck scatter shield after he exploded the clutch pressure plate and flywheel, the can was flatten like M60 tank drove over it, pieces from one of those exploding parts pierce the front passenger side roll bar brace to the front of the right subframe, another piece broke a piece off of the back of the block off. Other parts damaged and pierce the firewall and floor boards. It hurt his driver foot and basically total that 1968 Baracuda that he was racing in B/MP (Modified production) back then in the mid 1970s He had told me to leave off the block plate off on my 1970 Cuda A/S stocker, he said you didn't really need it I put it back in after that
Last edited by Cab_Burge; 10/31/21 02:14 AM.
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: For those "well my tranny never blew up" fools...
[Re: Cab_Burge]
#2979812
10/30/21 08:55 AM
10/30/21 08:55 AM
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Joined: Mar 2003
Posts: 2,541 PA
moparacer
master
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master
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Posts: 2,541
PA
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This might be the all time greatest, or worst depending on how you look at it, 727 explosion video. https://www.youtube.com/watch?v=aFc-z5q3inw&list=UUgSq1UVDO4j6YHH5eXBeKNwI have a 727 in my cuda that has been run for decades and been apart numerous times and freshened, but I want to get a 904 in it here soon.
Last edited by moparacer; 10/30/21 08:55 AM.
67 Barracuda street/bracket car 11.27-119 68 Dart 502 BB 8.70s-152 414 cid SB Dragster 7.65-174
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Re: For those "well my tranny never blew up" fools...
[Re: DrCharles]
#2979855
10/30/21 11:30 AM
10/30/21 11:30 AM
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Joined: Mar 2011
Posts: 3,178 Michigan
A727Tflite
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master
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Michigan
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That looks toasty. Hope he wasn't too scorched.
Is there any video of this one? Wrong class and wrong track. Never saw a video.
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