Re: 904 Transmission gurus.....
[Re: dOc …]
#270864
03/29/09 10:34 PM
03/29/09 10:34 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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i put 5 clutches in the front clutch pac using the thin clutches and steels..
for racing...i change out the big spring in the front clutch to the 24 small spring set up...
outside that and the valve body the trans is stock.
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 Transmission gurus.....
[Re: Wedgeman]
#270866
03/29/09 11:27 PM
03/29/09 11:27 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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this is what i have done to several 904s
removed the 4 clutch/steels...
installed the 5 clutch/steels..using the thin ones..i get about 50-55 thousands clearance which i think is too tight... I take the pressure plate that is in the clutch pac to machine shop..have about .020 removed to get .070-.075 clearance..
so i am using stock clutch/drum..and stock pump.
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 Transmission gurus.....
[Re: 70AARcuda]
#270873
03/30/09 02:04 PM
03/30/09 02:04 PM
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Joined: Jan 2003
Posts: 1,488 New Mexico
74Scamp
pro stock
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pro stock
Joined: Jan 2003
Posts: 1,488
New Mexico
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Quote:
Quote:
AARCUDA...
As stated, wouldn't it be better to dump my 67 and start with a later one ? '80-up ?
Daniel
if you are talking about the whole trans ..probably yes.
but I would not mix parts unless you are positive they work.
actually the 72 and newer 904 are better due to a change in the servos...
some of the 904 came with 5 clutches aka 999 in the 80s.
mine are used for bracket racing and so far it has worked for me.
Don't mean to hijack this thread, but for a mild 360, would you still machine to get the .70 to .75? Mine is a 999 and I'm getting ready to start putting it back together this weekend and was just wondering (my first tranny rebuild).
Dave
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Re: 904 Transmission gurus.....
[Re: 70AARcuda]
#270879
03/30/09 04:03 PM
03/30/09 04:03 PM
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Joined: Jan 2005
Posts: 12,424 Kalispell Mt.
HotRodDave
I Live Here
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I Live Here
Joined: Jan 2005
Posts: 12,424
Kalispell Mt.
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Another good thing about the early 80s trans is the low gear ratio 1st and 2nd gear sets they have.
When I build a 4 clutch drum into a 5 clutch unit I just change the snap ring thickness. Usually combining 2 thin flat snaprings and useing the thick waffle clutches you can get 5 in there. I don't like the flat ones because the fuid takes longer to get out from between them, the clutches will hydro plane over each other for a second. If my pack is still tight I might slide one flat clutch in there just to get the clearance.
Another good mod is to remove the wavy snap rings and install flat rings, this reduces slipage during engagement.
If you use the trans go kit don't be afraid to drill the shift holes to the max size, it still is not a hard shift.
One more thing I like to do is run type F fluid for an even faster shift.
I am not causing global warming, I am just trying to hold off a impending Ice Age!
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Re: 904 Transmission gurus.....(suite..)
[Re: HotRodDave]
#270880
03/30/09 04:18 PM
03/30/09 04:18 PM
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Joined: May 2004
Posts: 1,522 Ste-Sophie, Quebec, Canada
Wedgeman
OP
pro stock
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OP
pro stock
Joined: May 2004
Posts: 1,522
Ste-Sophie, Quebec, Canada
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Wow.....that's a lot to assimilate......I'll work on all these infos.. Ok...took the trans apart looks great.....Is this the picture of worn clutches ? looks fine to me....has it been rebuilt ? or just a polite previous owner ? Comments please.... Also.....yes the planetray carrier is aluminum...
Last edited by Wedgeman; 03/31/09 03:04 PM.
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Re: 904 Transmission ..(suite..)
[Re: Wedgeman]
#270881
03/31/09 03:05 PM
03/31/09 03:05 PM
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Joined: May 2004
Posts: 1,522 Ste-Sophie, Quebec, Canada
Wedgeman
OP
pro stock
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OP
pro stock
Joined: May 2004
Posts: 1,522
Ste-Sophie, Quebec, Canada
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Do you think I still need to rebuild it ? it's going behind a 360
Or I could get an '87 model that was in a Fifth Ave car with a 318 ?
Daniel
Last edited by Wedgeman; 03/31/09 03:49 PM.
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