Did I just break a sprag? Update 2
#2668828
06/22/19 09:07 PM
06/22/19 09:07 PM
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Joined: May 2019
Posts: 163 W. Pa
usp4u
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OP
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Joined: May 2019
Posts: 163
W. Pa
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Never broken one before.....full weight e body with drag radials, 402 small block, 727, turbo action fmvb, 3.91 Pulled out on street, poked it...car went sideways, I lifted, and poked it again. ZIIIIIZZZZZZZZZZ car moves under own power but any throttle produces more ZIIIIIIZZZZZZZZ. not what I needed on a car I planned to drive to Carlisle in two weeks Pulled trans, everything looks fine........then I had an epiphany.....loose converter, Mancini low gear pack, sticky tires, old OEM gear set.. I'll bet I stripped the ring n pinion. That would explain motion in all gears, but ziiiiiiiiizzzzz upon throttle. I heard it under the shifter, but that could be gear noise resonating up the driveshaft. I had a meeting tonight and couldn't work on it...tomorrow night I'll pull the diff, and ill bet it is hurt. Pulled axles and diff... 1/4 inch of splines were ripped off the right side axle
Last edited by usp4u; 06/26/19 01:05 AM.
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Re: Did I just break a sprag?
[Re: Moparteacher]
#2668856
06/22/19 10:37 PM
06/22/19 10:37 PM
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Joined: Aug 2011
Posts: 2,857 Pattison Texas
CSK
master
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master
Joined: Aug 2011
Posts: 2,857
Pattison Texas
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Put it in manual low. If it goes then ya busted sprag. They all go in manual low ?
1968 Charger COLD A/C Hilborn EFI 512ci 9.7 compression, Stealth heads, 4.10 gear A518 ODtrans 4100lb,10.93 full street car trim 2020 T/A 392 Stock 11.79 @ 114.5
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Re: Did I just break a sprag?
[Re: dart games]
#2668867
06/22/19 11:07 PM
06/22/19 11:07 PM
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Joined: May 2019
Posts: 163 W. Pa
usp4u
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That would be a gross way to live. No thanks. Really just hoping anyone could tell me if this sounds like a sprag or not.
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Re: Did I just break a sprag?
[Re: usp4u]
#2668876
06/22/19 11:23 PM
06/22/19 11:23 PM
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Joined: Aug 2003
Posts: 43,163 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,163
Bend,OR USA
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Never broken one before.....full weight e body with drag radials, 402 small block, 727, turbo action fmvb, 3.91 Pulled out on street, poked it...car went sideways, I lifted, and poked it again. ZIIIIIZZZZZZZZZZ car moves under own power but any throttle produces more ZIIIIIIZZZZZZZZ. not what I needed on a car I planned to drive to Carlisle in two weeks My advice is when in doubt, check it out Don't find out later after it explodes that you hurt it enough to hurt you
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: Did I just break a sprag?
[Re: usp4u]
#2668881
06/22/19 11:29 PM
06/22/19 11:29 PM
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Joined: Dec 2005
Posts: 11,552 Fulton County, PA
CMcAllister
Mr. Helpful
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Mr. Helpful
Joined: Dec 2005
Posts: 11,552
Fulton County, PA
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I just fixed one that had a partially failed roller clutch after breaking a rear. He was also starting his burnouts in low. Car drove OK with no noise. Had a TCI transbrake valvebody (LBA I assume). Guy brought it to me after I suggested it should be checked, even though the car drove fine. Half of the springs were crushed and the fingers were folded over. Would not have survived another hard hit.
Stock drum 727? I would treat it like a grenade with the pin out until it was looked at. Gasket kit and time are cheap.
If the results don't match the theory, change the theory.
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Re: Did I just break a sprag?
[Re: dOrk !]
#2668895
06/23/19 12:17 AM
06/23/19 12:17 AM
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Joined: May 2019
Posts: 163 W. Pa
usp4u
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just dropped the pan. zero trash.
the car will move in all gears........until you touch the throttle. then ZZZIIIIIIIIIIZZZZ from under the tunnel.
I did find two bolts convertor that were backing off. but that cant be it
and yes, "fmvb" = turbo-action forward manual valve body (forward to allow my slap-stik to work, no LBA) been in for about 10 years and 8k miles.
Last edited by usp4u; 06/23/19 12:19 AM.
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Re: Did I just break a sprag?
[Re: CSK]
#2668910
06/23/19 01:59 AM
06/23/19 01:59 AM
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Joined: Jul 2008
Posts: 608 Boise
Moparteacher
mopar
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mopar
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Posts: 608
Boise
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Put it in manual low. If it goes then ya busted sprag. They all go in manual low ? Missed the part about RMVB. Woopise.
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Re: Did I just break a sprag?
[Re: Moparteacher]
#2668916
06/23/19 02:56 AM
06/23/19 02:56 AM
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Joined: May 2019
Posts: 163 W. Pa
usp4u
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OP
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Put it in manual low. If it goes then ya busted sprag. They all go in manual low ? Missed the part about RMVB. Woopise. It's not rmvb......it is fmvb.
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Re: Did I just break a sprag?
[Re: dvw]
#2668976
06/23/19 10:08 AM
06/23/19 10:08 AM
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Joined: Feb 2008
Posts: 452 Monrovia, So-Cal, USA
racerhog
mopar
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mopar
Joined: Feb 2008
Posts: 452
Monrovia, So-Cal, USA
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My bet is hard part failure. The sprag won't disable 2nd, 3rd, or rev. Stripped input shaft hub or broken planetary. Doug I agree... Or cracked a drum...
Bob(Cowboy)Hogan Monrovia So-Cal
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Re: Did I just break a sprag?
[Re: usp4u]
#2669006
06/23/19 11:49 AM
06/23/19 11:49 AM
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Joined: Jun 2003
Posts: 52,972 Romeo MI
MR_P_BODY
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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How many rpms were you running at the time you hit it... MOST times when a sprag gives out is when you get off the pedal then hit it again.. I blew a rear end in the race car but it didnt hurt the sprag.. I pulled the trans for a check but it was fine.. the getting back on it after letting off is what can hurt it... its that slap of the rollers that can break the roller case.. in a manual VB its hard to tell if you cracked it.. pull it now while you have the time... good luck
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Re: Did I just break a sprag?
[Re: usp4u]
#2669024
06/23/19 01:05 PM
06/23/19 01:05 PM
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Joined: Jan 2003
Posts: 25,786 Rio Linda, CA
John_Kunkel
Too Many Posts
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Too Many Posts
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Rio Linda, CA
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the car will move in all gears........until you touch the throttle. then ZZZIIIIIIIIIIZZZZ from under the tunnel.
Does that include Reverse or just the forward gears? In any case, it needs to come out, no easy external fix.
The INTERNET, the MISinformation superhighway
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Re: Did I just break a sprag?
[Re: John_Kunkel]
#2669032
06/23/19 02:13 PM
06/23/19 02:13 PM
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Joined: May 2019
Posts: 163 W. Pa
usp4u
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the car will move in all gears........until you touch the throttle. then ZZZIIIIIIIIIIZZZZ from under the tunnel.
Does that include Reverse or just the forward gears? In any case, it needs to come out, no easy external fix. All gears including reverse
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