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Re: Tranny Explodes
[Re: maximum entropy]
#1024699
07/03/11 09:21 PM
07/03/11 09:21 PM
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Joined: Mar 2003
Posts: 2,521
PA
moparacer
master
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master
Joined: Mar 2003
Posts: 2,521
PA
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If you are making ANY amount of serious power JUST PUT A GLIDE IN IT.... Nuff said.... I might be a mopar guy at heart but I do happen to value walking around with both feet properly attached thank you. 
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: Tranny Explodes
[Re: moparacer]
#1024700
07/03/11 10:18 PM
07/03/11 10:18 PM
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Joined: Jul 2008
Posts: 30,468
Florida STAYcation
dOc !
The village idiot's idiot
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The village idiot's idiot
Joined: Jul 2008
Posts: 30,468
Florida STAYcation
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Quote:
I might be a mopar guy
at heart but I do happen to value walking around with both feet properly attached thank you.
But NO ... you are not ..... you are deep-down a GovernmentMotors  .....  ... 
Yes ...feet are important part of the body ...and YES ... 727's BLOW UP .....
But if you have the proper parts IN THE TRANS .. they are as "safe" as any 727 in a daily-driver.
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Re: Tranny Explodes
[Re: 1_WILD_RT]
#1024701
07/03/11 10:43 PM
07/03/11 10:43 PM
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Joined: Jan 2003
Posts: 296
Ontario Canada
Hutch
enthusiast
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enthusiast
Joined: Jan 2003
Posts: 296
Ontario Canada
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Quote:
Quote:
Quote:
But the cause is letting off the throttle in 1st gear with no low band (rear band) apply in 1st gear.
So your saying the direct(front) drum is being spun to burst speed when you lift throttle in first gear and the roller clutch freewheels?
I really think you are misinforming people with this statement.
Hutch
No! That is not what he is saying... The explosion occurs when you launch after having let off the throttle at high RPM with the shifter in first gear with no low band apply.... This can allow the sprag to lay over... Once the sprag lays over the pin has been pulled.. If you miss the signs an explosion is eminent... A bolt in sprag does nothing to stop the problem because all a bolt in sprag does is secure the outer portion of the sprag to the trans case with bolts rather than splines & a set screw... A low band apply valve body prevents the issue by holding the low/reverse drum so the sprag doesn't see the load that could cause it to fail... An aluminum or billet drum doesn't prevent the sprag failure but the drum is of higher quality & if the sprag does fail the drum doesn't fail so theres no explosion.. What is being pointed out is if your aware of the problem, know the cause & drive with the proper procedure than there is no problem... Either start the burnout in second or shift to second before getting out of the gas..... Also be out of first before the tires hit dry pavement.. The shock of the tires grabbing coming out of the burnout box can shock the sprag causing it to lay over.... Be aware...... Or don't pay attention & just buy a low band apply valve body so your protected....
I am very aware of WHY they blow up that is why I made a comment about the statement I quoted prior to yours which states the "cause" which is inaccurate and misinformative IMO. Im not looking to get into it , just to offer proper accurate info. Lifting off the throttle w/o low band apply does nothing to the roller clutch. Improper burnout procedure , jackstand transbrake tests , improper assembly of roller clutch (roller diameter or spring direction/condition) inner race preparation and the list goes on is the cause of the problem. Low band apply helps stabilize the clutch but is not the cure.
Hutch
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Re: Tranny Explodes
[Re: Hutch]
#1024705
07/04/11 08:54 AM
07/04/11 08:54 AM
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Joined: Jan 2003
Posts: 16,929
NC
440Jim
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 16,929
NC
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Quote:
Quote:
But the cause is letting off the throttle in 1st gear with no low band (rear band) apply in 1st gear.
So your saying the direct(front) drum is being spun to burst speed when you lift throttle in first gear and the roller clutch freewheels?
I really think you are misinforming people with this statement.
Hutch
I am not trying to misinform people, you don't understand. You are the one that posted the burst speed statement, not me. I was commenting on driving technique.
It is the unloading and reloading the sprag that can damage it. It all started (in this case) with lifting in 1st gear with no low band apply. That in itself may not roll the sprag, but if the driver shifts to 2nd before lifting, the reloading of the sprag will never happen and therefore avoid damage.
Only after the sprag is rolled, and the trans is in 1st gear with no low band apply and power is applied; then the front drum spins at 2.2 engine speed. This could happen on the next launch, when the damage was done in the previous launch.
The point I was trying to make, without the long and confusing explaination, is to shift to 2nd when something goes wrong. If you need to lift the throttle for other safety reasons, still shift to 2nd!
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Re: Tranny Explodes
[Re: rapom]
#1024706
07/04/11 11:58 AM
07/04/11 11:58 AM
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Joined: Mar 2005
Posts: 2,060
Pendleton NY
terzmo
OP
top fuel
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OP
top fuel
Joined: Mar 2005
Posts: 2,060
Pendleton NY
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Quote:
Doing a burn out in 1st. gear. I'll let others explain.
This was on launch..not burnout
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Re: Tranny Explodes
[Re: MR_P_BODY]
#1024707
07/04/11 11:59 AM
07/04/11 11:59 AM
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Joined: Mar 2005
Posts: 2,060
Pendleton NY
terzmo
OP
top fuel
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OP
top fuel
Joined: Mar 2005
Posts: 2,060
Pendleton NY
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Quote:
Quote:
Just what Mr. P body says. 
GET A BLANKET OR A SHIELD!!!!!
Wait a second. How does a 4-link car with a funny car tire SPIN...??
Simple... pump them up like a basket ball
tire pressure was no over inflated
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Re: Tranny Explodes
[Re: terzmo]
#1024708
07/04/11 12:44 PM
07/04/11 12:44 PM
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Joined: Nov 2003
Posts: 7,348
Mt.Vernon ,Ohio
VernMotor
master
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master
Joined: Nov 2003
Posts: 7,348
Mt.Vernon ,Ohio
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Quote:
Quote:
Doing a burn out in 1st. gear. I'll let others explain.
This was on launch..not burnout
But did he do the burn out in 1st gear ?
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Re: Tranny Explodes
[Re: terzmo]
#1024709
07/04/11 01:34 PM
07/04/11 01:34 PM
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Joined: Jul 2008
Posts: 30,468
Florida STAYcation
dOc !
The village idiot's idiot
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The village idiot's idiot
Joined: Jul 2008
Posts: 30,468
Florida STAYcation
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Quote:
Quote:
Doing a burn out in 1st. gear. I'll let others explain.
This was on launch..not burnout
From what I have heard(never seen this happen) ... is that you can damage the sprag on a burnout(when coming out of the water by hooking then spinning then hooking again).....THEN on the launch the sprag comes apart and the insides spin 2.5 times engine speed.
WITH an alum drum(or billet steel) ... no V8 Mopsar engine is capable of reving HIGH ENOUGH to explode the front-drum.
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Re: Tranny Explodes
[Re: VernMotor]
#1024710
07/04/11 03:18 PM
07/04/11 03:18 PM
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Joined: Mar 2005
Posts: 2,060
Pendleton NY
terzmo
OP
top fuel
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OP
top fuel
Joined: Mar 2005
Posts: 2,060
Pendleton NY
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Quote:
Quote:
Quote:
Doing a burn out in 1st. gear. I'll let others explain.
This was on launch..not burnout
But did he do the burn out in 1st gear ?
no..2nd
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Re: Tranny Explodes
[Re: 440Jim]
#1024712
07/04/11 08:38 PM
07/04/11 08:38 PM
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Joined: Jan 2003
Posts: 296
Ontario Canada
Hutch
enthusiast
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enthusiast
Joined: Jan 2003
Posts: 296
Ontario Canada
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Hutch
I am not trying to misinform people, you don't understand. You are the one that posted the burst speed statement, not me. I was commenting on driving technique.
It is the unloading and reloading the sprag that can damage it. It all started (in this case) with lifting in 1st gear with no low band apply. That in itself may not roll the sprag, but if the driver shifts to 2nd before lifting, the reloading of the sprag will never happen and therefore avoid damage.
Only after the sprag is rolled, and the trans is in 1st gear with no low band apply and power is applied; then the front drum spins at 2.2 engine speed. This could happen on the next launch, when the damage was done in the previous launch.
The point I was trying to make, without the long and confusing explaination, is to shift to 2nd when something goes wrong. If you need to lift the throttle for other safety reasons, still shift to 2nd!
Once again , your confusing people. You stated ,when you get into trouble on the track we should now shift to 2nd and that will prevent future roller clutch failures? HELL NO!!
If we lift throttle in low gear and do not shift to 2nd we will kill the roller clutch? HELL NO!!!
Pedalling the car in low gear can damage a roller clutch. HELL YES!!
Just wanting to clarify this with you. 
Hutch
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