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Re: 904 race trans wish list
[Re: scottb]
#383047
07/22/09 01:13 PM
07/22/09 01:13 PM
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Joined: Jan 2003
Posts: 9,826
las vegas
70AARcuda
master
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master
Joined: Jan 2003
Posts: 9,826
las vegas
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5 clutches in the front clutch pac
Tony
70 AARCuda Vitamin C
71 Dart Swinger 360 10.318 @ 128.22(10-04-14 Bakersfield)
71 Demon 360 10.666 @122.41 (01-29-17 @ Las Vegas)
71 Duster 408 (10.29 @ 127.86 3/16/19 Las Vegas)
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Re: 904 race trans wish list
[Re: dc426]
#383050
07/22/09 07:56 PM
07/22/09 07:56 PM
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Joined: May 2006
Posts: 296
CT
turbocolt2.4L
enthusiast
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enthusiast
Joined: May 2006
Posts: 296
CT
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rollerized gov support a must ,wide pump gears if you machine little off top end plate you can fit 5 frictions in forward too and all the above.I dont think you need harded input shaft i have a stocker in mine over 500 hp to wheels 2500 lbs car leave 6000rpm on brake 27 psi of boost.mid 9's.
Last edited by turbocolt2.4L; 07/22/09 07:57 PM.
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Re: 904 race trans wish list
[Re: dc426]
#383052
07/22/09 08:15 PM
07/22/09 08:15 PM
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Joined: Jan 2004
Posts: 13,247
Mt. Vernon, Ohio
dartman366
I Live Here
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I Live Here
Joined: Jan 2004
Posts: 13,247
Mt. Vernon, Ohio
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Quote:
anyone else wanna add anything?
same oiling mod's and build procedure's as a 727, high quality clutch's, band's, bushing's and thrust bearing's, and keep clearance's tight. 
Light travels faster than the speed of sound,,,this is why some people seem bright untill you hear them speak.
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Re: 904 race trans wish list
[Re: dartman366]
#383053
07/22/09 08:53 PM
07/22/09 08:53 PM
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Joined: Jan 2003
Posts: 6,139
Melbourne , Australia
LA360
master
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master
Joined: Jan 2003
Posts: 6,139
Melbourne , Australia
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Try and find a core with steel planetries if you can.
Sell your 727 and convertor to pay for the parts of your 904.
Parts I'd buy-
Roller rear support.
re-use your brake or pick up a Griner or similar.
Quality rebuild kit including new bushes and thrusts etc.
If your budget allows an aluminium drum and a hardened Input shaft would be nice.
We usually run a bIgger neck (BW35) as well.
AL.....
Alan Jones
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Re: 904 race trans wish list
[Re: LA360]
#383054
07/22/09 08:59 PM
07/22/09 08:59 PM
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Joined: Aug 2003
Posts: 5,000
Tampa Florida
dc426
OP
gotta keep'm separated
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OP
gotta keep'm separated
Joined: Aug 2003
Posts: 5,000
Tampa Florida
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Quote:
We usually run a bIgger neck
not sure what your talking about here? 
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Re: 904 race trans wish list
[Re: Chris2581]
#383057
07/22/09 10:57 PM
07/22/09 10:57 PM
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Joined: Jan 2003
Posts: 2,697
Renton Wa
topfueldart
master
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master
Joined: Jan 2003
Posts: 2,697
Renton Wa
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Quote:
Quote:
I wouldn't swap 
I wouldn't either.That 727 is going to last a lot longer than the 904 will,even if the 904 is race prepped with all the goodies.
It all depends on what its going behind, your intended use, and how well the trans is built... SS/AH Hemi Cars wouldnt run 904 internals if it werent worth it.
11.48 @ 120 with a 1.80 60' 318, stock 1.88 heads, stock 904, Pump Gas, 13 lbs of boost.
9.94 @ 134, 318 on pump gas, 14 lbs w/ Eddies, transbrake 727, 3600 lbs, 3.54 gear and 28's.
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Re: 904 race trans wish list
[Re: topfueldart]
#383059
07/22/09 11:10 PM
07/22/09 11:10 PM
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Joined: Jul 2006
Posts: 4,595
On the south side of Nowhere
S/ST 3040
master
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master
Joined: Jul 2006
Posts: 4,595
On the south side of Nowhere
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Quote:
SS/AH Hemi Cars wouldnt run 904 internals if it werent worth it.
Oh, it's worth it.......but, they don't use that lightweight stuff because it strong
and I doubt there is one thing in them that originally came in a 904.
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Re: 904 race trans wish list
[Re: S/ST 3040]
#383060
07/23/09 01:19 AM
07/23/09 01:19 AM
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Joined: Jan 2003
Posts: 2,697
Renton Wa
topfueldart
master
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master
Joined: Jan 2003
Posts: 2,697
Renton Wa
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Quote:
Quote:
SS/AH Hemi Cars wouldnt run 904 internals if it werent worth it.
Oh, it's worth it.......but, they don't use that lightweight stuff because it strong
and I doubt there is one thing in them that originally came in a 904.
I understand your point. I just dont agree with the viewpoints of many Mopurists that its 727 or nothing. 904's have their worth as well. I already have a good number of performance 904 parts, so for me, I'll stick with the 904 until im proven its not worth it anymore. Which will be much farther than most would ever dare.
11.48 @ 120 with a 1.80 60' 318, stock 1.88 heads, stock 904, Pump Gas, 13 lbs of boost.
9.94 @ 134, 318 on pump gas, 14 lbs w/ Eddies, transbrake 727, 3600 lbs, 3.54 gear and 28's.
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Re: 904 race trans wish list
[Re: LA360]
#383062
07/23/09 02:19 AM
07/23/09 02:19 AM
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Joined: Jul 2005
Posts: 384
Australia
Mcode69
enthusiast
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enthusiast
Joined: Jul 2005
Posts: 384
Australia
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Quote:
Try and find a core with steel planetries if you can.
Sell your 727 and convertor to pay for the parts of your 904.
Parts I'd buy-
Roller rear support.
re-use your brake or pick up a Griner or similar.
Quality rebuild kit including new bushes and
thrusts etc.
If your budget allows an aluminium drum and a hardened Input shaft would be nice.
We usually run a bIgger neck (BW35) as well.
AL.....
Find a '76 or later 904 for a core, they come with the steel planetaries. The pre '76 ones have aluminium planetaries and are a weak link.
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Re: 904 race trans wish list
[Re: Mcode69]
#383063
07/23/09 09:24 AM
07/23/09 09:24 AM
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Joined: Aug 2003
Posts: 5,000
Tampa Florida
dc426
OP
gotta keep'm separated
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OP
gotta keep'm separated
Joined: Aug 2003
Posts: 5,000
Tampa Florida
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Quote:
larger diameter neck on convertor
how is this accomplished? what about the pump, what do you do there?
DC
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Re: 904 race trans wish list
[Re: dc426]
#383064
07/23/09 08:53 PM
07/23/09 08:53 PM
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Joined: Jan 2003
Posts: 6,139
Melbourne , Australia
LA360
master
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master
Joined: Jan 2003
Posts: 6,139
Melbourne , Australia
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The diameter of the Borg Warner 35 convertor neck is around 3/16"ish bigger than the 904. Basic the company making the convertor machines up a stepped neck, the diameter that drives the pump is the standard size, the diamter that runs on the pump bush is the larger size. Most importantly, this adds thickness to the bottom of the drive slot where 904 necks are prone to cracking.
Basically every reputable convertor shop in Australia has this as an option (Big Neck). Autoflite Engineering (Dominator Convertors) were the first to do this many years ago. I have a pic somewhere, but I would have to dig it up.
AL....
Alan Jones
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Re: 904 race trans wish list
[Re: dc426]
#383066
07/23/09 10:44 PM
07/23/09 10:44 PM
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Joined: Jan 2003
Posts: 6,139
Melbourne , Australia
LA360
master
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master
Joined: Jan 2003
Posts: 6,139
Melbourne , Australia
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How Plentiful are Borg Warner 35 Automatic transmissions over there? They are everywhere over here.
AL.....
Alan Jones
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Re: 904 race trans wish list
[Re: topfueldart]
#383068
07/23/09 11:50 PM
07/23/09 11:50 PM
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Joined: Jan 2003
Posts: 2,511
Tampa , Fl
MoparJoe
super gas
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super gas
Joined: Jan 2003
Posts: 2,511
Tampa , Fl
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Quote:
Quote:
Quote:
SS/AH Hemi Cars wouldnt run 904 internals if it werent worth it.
Oh, it's worth it.......but, they don't use that lightweight stuff because it strong
and I doubt there is one thing in them that originally came in a 904.
I understand your point. I just dont agree with the viewpoints of many Mopurists that its 727 or nothing. 904's have their worth as well. I already have a good number of performance 904 parts, so for me, I'll stick with the 904 until im proven its not worth it anymore. Which will be much farther than most would ever dare.
You have about another .75 sec before you start mowing thru anything stock in a 904. One of my friends went thru this with his, on a 11.2 car the stock 904 would go for 2 years with just the standard performance rebuild, manual VB and small snout converter.
When he swapped to a better motor that runs 10.5's it started getting 3-4 runs before the clutches were gone, when the clutch issue was fixed it started breaking cases and input shafts every few passes. He has a built 904 in it now but the price is almost the same as an entry level lenco.
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Re: 904 race trans wish list
[Re: dc426]
#383069
07/24/09 12:30 AM
07/24/09 12:30 AM
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Joined: Jan 2003
Posts: 9,826
las vegas
70AARcuda
master
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master
Joined: Jan 2003
Posts: 9,826
las vegas
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Quote:
 hmm, interesting. I haven't heard of this in the states....anyone?
DC
go to turboaction.com
click on instruction on left side of page...
then click on tech tip #6...,,,and it reads,,,and it has pictures...
It is not unusual for a Torqueflite 904 converter to crack the pump drive neck as shown above. Turbo Action to help stop this problem, was the first company to use chrome moly pump necks. This helped, but you can help this problem even more with our help. Machine the ring on your reaction shaft off and then request to make your converter pump neck solid on the inside (N0 Step). If you machine this ring off and you do not make pump neck thicker, you will not hurt your transmission or converter. If you install a solid neck converter on a stock transmission, you will have problems.
Tony
70 AARCuda Vitamin C
71 Dart Swinger 360 10.318 @ 128.22(10-04-14 Bakersfield)
71 Demon 360 10.666 @122.41 (01-29-17 @ Las Vegas)
71 Duster 408 (10.29 @ 127.86 3/16/19 Las Vegas)
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