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Re: Help with sprag please
[Re: dOc …]
#1510135
09/30/13 08:33 PM
09/30/13 08:33 PM
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Joined: Jan 2003
Posts: 4,616
Kissimmee Fl.
dusturbd340W5
master
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master
Joined: Jan 2003
Posts: 4,616
Kissimmee Fl.
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first of all on a 904 the outer sprag race is riveted to the case no reason to remove it
727 race can be removed with a punch through the bolt holes as stated
70 duster full chassis super pro 416 CNC Indybrock heads 727 w/brake
best so far 1.212 60 6.219 in 1/8 at 110.88 9.768 at 137.81 1/4
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Re: Help with sprag please
[Re: Cab_Burge]
#1510138
09/30/13 09:52 PM
09/30/13 09:52 PM
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Joined: Sep 2012
Posts: 1,563
Janesville, WI
SpareParts
OP
pro stock
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OP
pro stock
Joined: Sep 2012
Posts: 1,563
Janesville, WI
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Quote:
Quote:
And to add to the above as I just finished my 1st 727, don't waste a dime on the usual bolt-in sprag. It's a waste of money. I just put one in mine. You can get new rollers/springs for the one in the case for under $5. The only bolt in one I'd buy next time would be the Coan Super Sprag or equivelant. These are the real deal. Larger & more rollers to actually prevent the roll over.
If you haven't used one of the "Super Sprags yet( StockC6 Ford, I think) don't waste your time and money  A freind of mine did and it failed in his race car also  But he, his race car, is hard on 8 3/4 rear ends  
I think they are C6 sprags. Looking to beef this one up as a spare and to have the knowledge. I don't think Coan has a 904 super spray. I saw a 727 listed but no 904 and idk for sure if they cross over.
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Re: Help with sprag please
[Re: SpareParts]
#1510139
09/30/13 10:04 PM
09/30/13 10:04 PM
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Joined: Mar 2006
Posts: 9,882
MI, usa
dvw
master
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master
Joined: Mar 2006
Posts: 9,882
MI, usa
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My 3340lb, 9.25@146 Belvedere has the original 1965 sprag. No low band apply. So did my 10.20@132 3450lb 63 Dodge. The Dodge had over 1000 passes on the trans, the Plymouth 90 so far. Good drum and a shield. Doug
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Re: Help with sprag please
[Re: SpareParts]
#1510141
09/30/13 10:39 PM
09/30/13 10:39 PM
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Joined: Jan 2003
Posts: 75,094
A Banana Republic near you.
JohnRR
I Win
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I Win
Joined: Jan 2003
Posts: 75,094
A Banana Republic near you.
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Quote:
So I decided that I want to learn how to build my own 904's. Disassembly went well but I need some help with how to remove the sprag. My book shows the outer ring being recessed in the case I think that's 727. Do I pound or drill these rivet this GS intthis 904?? Thanks for helping me pop my transmission cherry!!
Is there anything wrong wit hthe current sprag ... if not LEAVE IT ALONE
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Re: Help with sprag please
[Re: 80fbody]
#1510142
09/30/13 10:41 PM
09/30/13 10:41 PM
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Joined: Jan 2003
Posts: 75,094
A Banana Republic near you.
JohnRR
I Win
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I Win
Joined: Jan 2003
Posts: 75,094
A Banana Republic near you.
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Quote:
Guess I'll stick with a stock sprag on my next trans as well. Sad to hear those Super Sprags aren't really any better.
You can stick with a stock sprag but change to a billet front drum or else 
ASSuMEing it's a 727
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Re: Help with sprag please
[Re: JohnRR]
#1510143
10/01/13 01:17 AM
10/01/13 01:17 AM
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Joined: Sep 2012
Posts: 1,563
Janesville, WI
SpareParts
OP
pro stock
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OP
pro stock
Joined: Sep 2012
Posts: 1,563
Janesville, WI
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Quote:
Quote:
So I decided that I want to learn how to build my own 904's. Disassembly went well but I need some help with how to remove the sprag. My book shows the outer ring being recessed in the case I think that's 727. Do I pound or drill these rivet this GS intthis 904?? Thanks for helping me pop my transmission cherry!!
Is there anything wrong wit hthe current sprag ... if not LEAVE IT ALONE
Possibly, broke an axle the other night on the launch. The trans I experimented with today was out of a parted out car. Just felt confident today and wanted to learn 
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Re: Help with sprag please
[Re: SpareParts]
#1510144
10/01/13 04:24 AM
10/01/13 04:24 AM
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Joined: Jan 2003
Posts: 6,150
Melbourne , Australia
LA360
master
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master
Joined: Jan 2003
Posts: 6,150
Melbourne , Australia
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904's seldom have issues with the sprag failing. I would only replace the entire unit is it's damaged. Otherwise I would get a set of new rollers and springs and go with that and call it good. If you want a heavy duty unit, ATI sell one for around $350
Incidentally, the very few 904 transmissions I have seen with a damaged sprag have usually junked the case as well.
Alan Jones
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Re: Help with sprag please
[Re: LA360]
#1510146
10/01/13 11:16 AM
10/01/13 11:16 AM
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Joined: Sep 2012
Posts: 1,563
Janesville, WI
SpareParts
OP
pro stock
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OP
pro stock
Joined: Sep 2012
Posts: 1,563
Janesville, WI
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Quote:
904's seldom have issues with the sprag failing. I would only replace the entire unit is it's damaged. Otherwise I would get a set of new rollers and springs and go with that and call it good. If you want a heavy duty unit, ATI sell one for around $350
Incidentally, the very few 904 transmissions I have seen with a damaged sprag have usually junked the case as well.
I already wrecked the bolt in sprag in my good trans when it ripped the perches off a while back
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Re: Help with sprag please
[Re: SpareParts]
#1510147
10/01/13 01:56 PM
10/01/13 01:56 PM
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Joined: Jan 2003
Posts: 75,094
A Banana Republic near you.
JohnRR
I Win
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I Win
Joined: Jan 2003
Posts: 75,094
A Banana Republic near you.
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Quote:
Quote:
904's seldom have issues with the sprag failing. I would only replace the entire unit is it's damaged. Otherwise I would get a set of new rollers and springs and go with that and call it good. If you want a heavy duty unit, ATI sell one for around $350
Incidentally, the very few 904 transmissions I have seen with a damaged sprag have usually junked the case as well.
I already wrecked the bolt in sprag in my good trans when it ripped the perches off a while back
727 or 904 ?
If 727 was it a coan or A+A super sprag , if not a regular bolt in is no better than a stock unit that is not loose in the case.
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