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Re: 904 Transmission ..(suite..)
[Re: Wedgeman]
#270884
03/31/09 04:04 PM
03/31/09 04:04 PM
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Joined: Jan 2005
Posts: 12,487
Kalispell Mt.
HotRodDave
I Live Here
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I Live Here
Joined: Jan 2005
Posts: 12,487
Kalispell Mt.
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I like lock ups, some guys don't. It locks the converter to keep it from slipping and building up heat in the trans and it also helps mpgs a little.
Those clutches should be the ones from the front clutch or the big drum. They look pretty good but dirty, still I would replace them since I had the trans apart, use good quality ones.
I am not causing global warming, I am just trying to hold off a impending Ice Age!
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Re: 904 Transmission ..(suite..)
[Re: HotRodDave]
#270885
03/31/09 04:33 PM
03/31/09 04:33 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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Ok, so I can use the lock up converter, I take it is neutrally balanced, so I can hook it up behind my 5.9l ??
Do you know if those have 4 or 5 clutch discs ?
Also, it has a 4 spd overdrive, does it require vaccum or electric device to go in overdrive when cruising ?
Thanks...
Daniel
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Re: 904 Transmission gurus.....
[Re: HotRodDave]
#270888
03/31/09 05:47 PM
03/31/09 05:47 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:
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.
Mine didn't have the wavy rings, just flat rings. I just received my new bands. So, I'm just about ready to start cleaning and putting back together. Should I be looking at rebuilding or replacing the pump? Tranny came from the car in a junk yard, so don't know if anything was wrong with it.
Dave
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Re: 904 Transmission ..(suite..)
[Re: Wedgeman]
#270890
03/31/09 06:06 PM
03/31/09 06:06 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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Quote:
Ok, so I can use the lock up converter, I take it is neutrally balanced, so I can hook it up behind my 5.9l ??
Do you know if those have 4 or 5 clutch discs ?
Also, it has a 4 spd overdrive, does it require vaccum or electric device to go in overdrive when cruising ?
Thanks...
Daniel
So........any idea on that ?
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Re: 904 Transmission ..(suite..)
[Re: IcorkSOAK]
#270892
03/31/09 06:58 PM
03/31/09 06:58 PM
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Joined: Jan 2005
Posts: 12,487
Kalispell Mt.
HotRodDave
I Live Here
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I Live Here
Joined: Jan 2005
Posts: 12,487
Kalispell Mt.
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A 727 disc has much more surface area than a 904, that is why they should have 5 clutches.
You can only use a LU converter in a LU trans.
The wavy snap rings are not obviously wavy, some times they lose most of their wave so you need to lay them on something very flat like a granite counter or a window. They also kind of hide, below the clutch pack against the aply piston. I have never seen a stock trans with out them but I have not disceted every single trans ever built and we all know how chrysler like to do weird stuff.
I am not causing global warming, I am just trying to hold off a impending Ice Age!
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Re: 904 Transmission ..(suite..)
[Re: Wedgeman]
#270895
03/31/09 07:15 PM
03/31/09 07:15 PM
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Joined: Jan 2005
Posts: 12,487
Kalispell Mt.
HotRodDave
I Live Here
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I Live Here
Joined: Jan 2005
Posts: 12,487
Kalispell Mt.
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there should be at least 2 snap rings, one above the clutch pack and one below it. Sometimes they put a flat one against the wavey one so there could be 3 in one clutch pack.
The 82+ trans should have all the good stuff, 5 clutches, heavy duty steel low gear ratio planataries, and LU. When I build a trans for myself this is the one I look for. If you are going to run it behind an externally balanced 360 you can get weights from mopar to weld on the converter or you can order a converter from an aftermarket suplier that has whatever stall speed you want and has the weights on it, or you can get a BnM flex plate with the weights on it or you can order a LU 360 converter from most local parts supliers.
I am not causing global warming, I am just trying to hold off a impending Ice Age!
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Re: 904 Transmission ..(suite..)
[Re: HotRodDave]
#270896
03/31/09 07:29 PM
03/31/09 07:29 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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Quote:
there should be at least 2 snap rings, one above the clutch pack and one below it. Sometimes they put a flat one against the wavey one so there could be 3 in one clutch pack.
The 82+ trans should have all the good stuff, 5 clutches, heavy duty steel low gear ratio planataries, and LU. When I build a trans for myself this is the one I look for. If you are going to run it behind an externally balanced 360 you can get weights from mopar to weld on the converter or you can order a converter from an aftermarket suplier that has whatever stall speed you want and has the weights on it, or you can get a BnM flex plate with the weights on it or you can order a LU 360 converter from most local parts supliers.
Whoa !.....let me get this straight ! lolll
I have to get weight to balance the converter...balance it with what ??? the crank ???? I have to take the crank out to balance it ??? i'm very confused on that.....please be very specific because I'm totally lost there Dave..
Daniel
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Re: 904 Transmission ..(suite..)
[Re: HotRodDave]
#270897
03/31/09 07:34 PM
03/31/09 07:34 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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removing the second snap ring allows the pistons to be removed and the seals on the piston need to be changed out...
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 ..(suite..)
[Re: Wedgeman]
#270898
03/31/09 08:15 PM
03/31/09 08:15 PM
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Joined: Jan 2005
Posts: 12,487
Kalispell Mt.
HotRodDave
I Live Here
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I Live Here
Joined: Jan 2005
Posts: 12,487
Kalispell Mt.
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A 360 does not have enough weight in the counter weights to counteract the weight of the pistons and rods so the factory threw a small amount of weight on the converter to help counterbalance the extra weight, the weight is a specific amount and all you need to do is add this weight to your converter, 360 converters already have this extra weight on them or you can add it to your 318 converter, mopar sells a kit with the weights and a way to locate them on your converter, no big deal really and no need to remove the crank, just weld the weight to the converter where it says to.
318s did not have the need for extra weight so there converters are neutraly balanced, no extra weight needed.
I am not causing global warming, I am just trying to hold off a impending Ice Age!
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