I just changed my 904's filter. It was a metal fine screen. Trying to determine if this was the original filter. Seems like all the aftermarket filters are like a fabric. Does anyone know if the screen type filter was the original filter?
Original A904 Trans Factory Filter?
- Thread starter 340inabbody
- Start date
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Yes I was told it was rebuilt with a shift kit but it’s leaking and was wondering what kind of rebuild I actually am dealing with. What was used by the factory with respect to filters?
Hellrats
Just another dumbass
All I have ever seen from the factory were the cheese cloth type. If it's a screen type filter it's most likely aftermarket. There is no way of telling what type rebuild you are actually dealing with from a filter as far as I know.
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I was just wondering if the trans was even opened. If it was a factory original type of filter (as I never seen a screen type for the 904) then it was not rebuilt.
pishta
I know I'm right....
screen type? Forget that, wonder if its so old that the cheese cloth over the screen just dissolved....I have a very fine gold screen coffee filter and I still get sludge at the bottom of every cup. Nothing when I supplement that with a good old paper filter.
Doug.S
1964 Dart More Door
Just wanted to throw out there that 1964 was the change over year for the trans filter on my Dart. It came from the factory with a metal screen and an in cooler line filter. I have since changed the pan and the filter. If this is an early 904 the pan will be too shallow to use the fabric covered filter and you could starve the pump. Deeper pan would be a plus. Also if it is an early 904 it will need the fabric covered filter with 2 holes. Front and rear pump. Some early drag racers used to find the screens and install them for better fluid flow. They would not filter the trans fluid at all. Not necessary 1/4 mile at a time. Doug
Its my understanding that the metal screen filters are intended for race only trans. The felt type filter does a much better job at filtering. The difference in the two would be flow but the felt type will flow plenty for most applications.
As far as I know all mopars came with the felt type, the exception may be some really early stuff but im not familiar with anything pre- 65. Those screen filters come with some shift kits and you can buy them by themselves. What year car are you dealing with?
As far as I know all mopars came with the felt type, the exception may be some really early stuff but im not familiar with anything pre- 65. Those screen filters come with some shift kits and you can buy them by themselves. What year car are you dealing with?
TrailBeast
AKA Mopars4us on Youtube
If I remember correctly some of the early transmissions used a screen filter, and I know for fact that some performance oriented transmissions got screens as part of a kit in the aftermarket.
I see people posted while I was typing.
63 max wedge 727 had a screen filter.
1970 Satellite
I put a deeper pan in. Its a Summit real nice by the way. It came with the filter extension. I used the mopar gasket which was also nice. I replaced both seals in n the speedo housing. No leak at the dipstick or the shift linkage seal. But I am still seeping fluid that ends up at the two eyelets which I believe are the mounting tabs for a floor shift. I can’t find the source of the leak yet and its hard when your on your back. Whish I had a lift.
Your leak is probably coming from the rear band pivot pin located at the tailshaft gasket flange. I seal the end with silicone and they dont leak. The o-ring alone does a poor job.
Mike can you explain where this is or show it on a diagram? I can then look there to see if thats it.
Cope
Fusing with fire
Could also be leaking from under the trans mount. That gasket is known to leak.
I fixed that as well...
The tailshaft end is dry. The leak looks like its where the tailshaft is bolted to the gearbox area but can’t find the spot.
pishta
I know I'm right....
now that makes more sense now.
Doug.S
1964 Dart More Door
Some of the bolts that hold the tail shaft to the gear box portion of the trans have the potential to leak. They use a special washer that is coated with a black sealer. I used the special washers and mine still leaked. So after my trans was in my car, I backed off each bolt, one at a time, and cleaned and sealed the flange end where it touches the housing. I used ATF safe RTV to seal every bolt. I finger tightened each bolt and waited the recommended time before going back to full torque. I have no leaks from the bolts now.
If it's a small leak they can be hard to find. Clean that area real good and get a can of Desenex foot powder SPRAY. Spray a bit on the trans where you suspect the leak is, let it dry, drive it, check it again.
It might show itself better.
transman
Well-Known Member
OEM filter is the dacron(fabric) filter. It is the large style. Used from 1966-2001 for the 727 and from 1966-2003 on the 904. The smaller brass one used on both the 904 and the 727. Most often the brass screen used in the aftermarket for high performance use as it supposedly has less restriction than the dacron style. When I serviced the transmission on the Duster I bought new in '71, it had the dacron filter in it, and my Challenger also had the dacron style. In all my years in the transmission parts industry the only time we sold the brass filter was if someone asked for it.
Thanks man this is what I was looking for transman!
Ok guys I thought I would follow up on this thread to help others that read this in the future. The leak was found! It was a cracked tail housing case! Hairline fracture just above the two case eyes for console shift mount. I bet the guy who installed it used it as a lift point. So glad I got help on this as finding this on my back was impossible......thanks for all tour inputs guys!
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