Re: 904 trans
[Re: Ian]
#370666
07/09/09 12:14 PM
07/09/09 12:14 PM
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Joined: Apr 2005
Posts: 1,880 USA
Ron Silva
top fuel
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top fuel
Joined: Apr 2005
Posts: 1,880
USA
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My Demon w/904, 3175 pounds on the footbrake with 650HP 474CI R3 W9 Small Block broke the output shaft on a launch. Never had a problem until I put a 3.55 gear (28" tall tires) in the rearend and that put too much load on the trans.
Last edited by dragrcr97; 07/09/09 12:22 PM.
SRT DEMON ONE SEAT
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Re: 904 trans
[Re: Ian]
#370668
07/09/09 06:55 PM
07/09/09 06:55 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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BTT
Who else here has experience going fast with a 904?
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 trans
[Re: topfueldart]
#370670
07/09/09 07:11 PM
07/09/09 07:11 PM
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Joined: Dec 2005
Posts: 11,551 Fulton County, PA
CMcAllister
Mr. Helpful
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Mr. Helpful
Joined: Dec 2005
Posts: 11,551
Fulton County, PA
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Light weight tube chassis car, low 9's, 145 MPH, 1.23 60. Had a Griner brake. Never broke it, but you have to do some maintenance. Super Stock Hemi cars use 904 components in a 727 case. It can be done, but you have to use the right stuff. Don't expect a $500 trans to stay in the car all year.
If the results don't match the theory, change the theory.
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Re: 904 trans
[Re: CMcAllister]
#370671
07/09/09 07:31 PM
07/09/09 07:31 PM
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Joined: Oct 2004
Posts: 489 mid Ga.
W5Dart378
mopar
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mopar
Joined: Oct 2004
Posts: 489
mid Ga.
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If it has aluminiun planitaries in it, the splines on it wont last too long. I've broke every piece of the drive line in mine.(since the new converter) I will also say if you have a converter that slips a lot it will help the trans live..
69 340 swinger streetcar 8.13 1/8th w/1.90 60ft w/ 3.55s
69 422W9 Dart stock suspension,5.27 on 275/60s,single bar plate
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Re: 904 trans
[Re: topfueldart]
#370672
07/09/09 08:05 PM
07/09/09 08:05 PM
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Joined: Mar 2005
Posts: 1,406 New Jersey, USA
yella71
pro stock
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pro stock
Joined: Mar 2005
Posts: 1,406
New Jersey, USA
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One of my coustomers is running an 85 short bed fullsize pup that I built a pretty strong 340 with E-Brock heads that runs 12.30s. no problems reported with the 904 trans. he has also put a little no2 through the motor. He also runs an 8.25 rear (4.30 gears) also holding up.
71 challenger convertable, 64 sport fury 383 ci with factory air
99 sebring convertable
89 CTD pup
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