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sprag failure #1480701
08/06/13 09:41 PM 08/06/13 09:41 PM
Joined: Feb 2006
Posts: 501
CEDAR RAPIDS
Plymouth340 Offline OP
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Wondering about things that would make a Sprag fail in 727. I know doing a burnout in first gear will. How about idling into the lights at low rpm when using a starting line enhancer. Had 1 fail and been doing the same procedure for 25 years but now I have a starting line enhancer. This is a transbrake tranny.... What do you guys think?
Re: sprag failure [Re: Plymouth340] #1480702
08/06/13 09:58 PM 08/06/13 09:58 PM
Joined: Jan 2003
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starting line enhancer

Re: sprag failure [Re: Plymouth340] #1480703
08/06/13 10:07 PM 08/06/13 10:07 PM
Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY Offline
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Ok.. you got me.. whats a starting line enhancer ...
I thought that was a 150 shot.... I think you might
have broke it on the previous run... you start in
2nd in the burn out box so its not applied
Re: sprag failure [Re: MR_P_BODY] #1480704
08/06/13 10:29 PM 08/06/13 10:29 PM
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Posts: 501
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Plymouth340 Offline OP
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Quote:

Ok.. you got me.. whats a starting line enhancer ...
I thought that was a 150 shot.... I think you might
have broke it on the previous run... you start in
2nd in the burn out box so its not applied


long story...google it. the dye hard box racers know what they are..broke it on the previous run? but why?

Last edited by Plymouth340; 08/06/13 10:30 PM.
Re: sprag failure [Re: MR_P_BODY] #1480705
08/06/13 10:36 PM 08/06/13 10:36 PM
Joined: Feb 2006
Posts: 501
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Plymouth340 Offline OP
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Quote:

Ok.. you got me.. whats a starting line enhancer ...
I thought that was a 150 shot.... I think you might
have broke it on the previous run... you start in
2nd in the burn out box so its not applied


starting line enhancer.....since you can have your gas pedal to the floor, and have the Starting Line Enhancer hold the motor at a low preset RPM until after your top bulb goes out, at that point the motor goes up to the 2-step
Re: sprag failure [Re: Plymouth340] #1480706
08/06/13 10:37 PM 08/06/13 10:37 PM
Joined: Jan 2003
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a spin then hook in 1st gear if you don't have low band apply will eat a sprag. putting the car in neutral at the starting line not giving it enough room to engage will get a sprag.starting line enhancer never heard of it

Re: sprag failure [Re: Plymouth340] #1480707
08/06/13 10:38 PM 08/06/13 10:38 PM
Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY Offline
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Quote:

Quote:

Ok.. you got me.. whats a starting line enhancer ...
I thought that was a 150 shot.... I think you might
have broke it on the previous run... you start in
2nd in the burn out box so its not applied


long story...google it. the dye hard box racers know what they are..broke it on the previous run? but why?



The easiest way is to pedal it while still in manual
low gear... if you decell it then hit it again...
did you spin in the previous run
Re: sprag failure [Re: Quicktree] #1480708
08/06/13 10:42 PM 08/06/13 10:42 PM
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you must be talking about a pro stage, i have one. never called it a starting line enhancer
Re: sprag failure [Re: MR_P_BODY] #1480709
08/06/13 10:42 PM 08/06/13 10:42 PM
Joined: Feb 2006
Posts: 501
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Plymouth340 Offline OP
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Quote:

Quote:

Quote:

Ok.. you got me.. whats a starting line enhancer ...
I thought that was a 150 shot.... I think you might
have broke it on the previous run... you start in
2nd in the burn out box so its not applied


long story...google it. the dye hard box racers know what they are..broke it on the previous run? but why?



The easiest way is to pedal it while still in manual
low gear... if you decell it then hit it again...
did you spin in the previous run


did not spin
Re: sprag failure [Re: Plymouth340] #1480710
08/06/13 10:43 PM 08/06/13 10:43 PM
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did you roll out of the burn out in 1st gear?
Re: sprag failure [Re: Quicktree] #1480711
08/06/13 10:46 PM 08/06/13 10:46 PM
Joined: Feb 2006
Posts: 501
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Plymouth340 Offline OP
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Quote:

did you roll out of the burn out in 1st gear?

no ...2nd then out of the box in 3rd like always
Re: sprag failure [Re: Plymouth340] #1480712
08/06/13 10:52 PM 08/06/13 10:52 PM
Joined: May 2006
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WA
JD Dart Offline
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I don't see why that would have any effect on the sprag in fact it should be easier on it because you won't hit throttle first then the trans brake.
Trans brake must be on for the throttle to come up.
Re: sprag failure [Re: Plymouth340] #1480713
08/06/13 10:57 PM 08/06/13 10:57 PM
Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY Offline
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By chance did you back up a little then pull forward..
if you dont pull forward about 4' it wont set the sprag
Re: sprag failure [Re: MR_P_BODY] #1480714
08/06/13 11:04 PM 08/06/13 11:04 PM
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Plymouth340 Offline OP
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Quote:

By chance did you back up a little then pull forward..
if you dont pull forward about 4' it wont set the sprag


didn't backup..poped it in netrual after burnout then pulled ahead but don't remember how far but someone else told me to pull ahead about 5 feet after putting it back in gear so will remember that..thanks
Re: sprag failure [Re: Plymouth340] #1480715
08/06/13 11:57 PM 08/06/13 11:57 PM
Joined: Jun 2009
Posts: 1,186
OHIO
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THE GLASS MAN Offline
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Check the length of your driveshaft.
Re: sprag failure [Re: THE GLASS MAN] #1480716
08/07/13 12:14 AM 08/07/13 12:14 AM
Joined: Aug 2008
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Mo.
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Quote:

Check the length of your driveshaft.

so what cha think that the driveshaft may be too long and stressing the sprag?

Re: sprag failure [Re: THE GLASS MAN] #1480717
08/07/13 06:25 PM 08/07/13 06:25 PM
Joined: Feb 2006
Posts: 501
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Plymouth340 Offline OP
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Quote:

Check the length of your driveshaft.

the driveshaft length hasn't changes in 18 years so I don't think that's it..
Re: sprag failure [Re: Plymouth340] #1480718
08/08/13 01:53 AM 08/08/13 01:53 AM
Joined: Jan 2004
Posts: 13,247
Mt. Vernon, Ohio
dartman366 Offline
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maybe it was just worn out from years of abuse, mechanical things are prone to failure at the most inoportune time.

Light travels faster than the speed of sound,,,this is why some people seem bright untill you hear them speak.
Re: sprag failure [Re: racerx] #1480719
08/08/13 02:43 AM 08/08/13 02:43 AM
Joined: Jun 2009
Posts: 1,186
OHIO
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THE GLASS MAN Offline
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Quote:

Quote:

Check the length of your driveshaft.

so what cha think that the driveshaft may be too long and stressing the sprag?

Motor might be moving to the rear a tad when that trans brake button is released. Do you have a strut rod on the motor to keep it from moving to the rear. Have you changed over to s/s springs lately. When you unbolt the rear u joint, how much does your drive shaft slip into the tranny ?
Re: sprag failure [Re: dartman366] #1480720
08/08/13 02:42 PM 08/08/13 02:42 PM
Joined: Jan 2003
Posts: 25,925
Rio Linda, CA
John_Kunkel Offline
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Quote:

maybe it was just worn out from years of abuse, mechanical things are prone to failure at the most inoportune time.



Very likely.

The INTERNET, the MISinformation superhighway
Re: sprag failure [Re: THE GLASS MAN] #1480721
08/08/13 06:11 PM 08/08/13 06:11 PM
Joined: Feb 2006
Posts: 501
CEDAR RAPIDS
Plymouth340 Offline OP
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Quote:

Quote:

Quote:

Check the length of your driveshaft.

so what cha think that the driveshaft may be too long and stressing the sprag?

Motor might be moving to the rear a tad when that trans brake button is released. Do you have a strut rod on the motor to keep it from moving to the rear. Have you changed over to s/s springs lately. When you unbolt the rear u joint, how much does your drive shaft slip into the tranny ?

have motor plate and mid plate and two strut rods so maybe its was just stressed from many trans brake launches
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