904 filter

[itsdiz]

I have a question for the transmission experts - I thought I knew 904 Torqueflites pretty well, I have owned several slant 6 cars with them and even rebuilt the one on my 1960 Valiant back in the early 1990s. I bought a filter and gasket kit to service mine on my 1965 Barracuda with 273 V8. The new one had two holes - one feed, one return? - and was smaller than the old filter which only had one hole. I looked at the valve body and there is two holes in it so I went ahead and installed the new filter. I was not aware there were two styles, anyone have any information on this?

 

[Dana67Dart]

I just looked up 67 dart automatic and the kits seem to have only one filter that looks like the one pictured, but comes with a ,904 and a 727 gasket.

The image shows both sides of the same filter.

 

[Darter6]

1965 (and earlier) had front and rear pumps. 1966 the rear was done away with.
If you had a dead battery (Pre1966) You could drift start cars with the rear pump.

 

[Dana67Dart]

1965 (and earlier) had front and rear pumps

Had no idea! Thanks

 

[itsdiz]

I just looked up 67 dart automatic and the kits seem to have only one filter that looks like the one pictured, but comes with a ,904 and a 727 gasket.

The image shows both sides of the same filter.

View attachment 1716491922

Mine came with both gaskets also, the filter that was in the trans is like the one in this picture and that is the way I remember them being, but it's been many years since I have had one, could it be just an aftermarket mod for better flow?

 

[Dana67Dart]

My concern about two holes would be if your trans did not have the second inlet it could allow fluid to bypass the filter material.

 

[RustyRatRod]

I don't like those crappy paper filters anyway. I use the brass screen filters. Flows a lot more fluid.

 

[Darter6]

I use the brass screen filters.

O.E in the 1963 and earlier years . Also had inline filters in the transmission cooler line. Bought a 63 Valiant, had both when I serviced it

 

[WV64Signet]

Y

My concern about two holes would be if your trans did not have the second inlet it could allow fluid to bypass the filter material.

Yessir

Dual pump... two holes. I agree that the earlier, two hole could be a problem

 

[itsdiz]

1965 (and earlier) had front and rear pumps. 1966 the rear was done away with.
If you had a dead battery (Pre1966) You could drift start cars with the rear pump.

Yes, learned that when I had my 1961 Valiant, the 1965 trans is the same as the 1964 and earlier push button automatics, with a cable rather than hard linkage so I was thinking it probably had the rear pump also just like earlier. The owner's manual in my '61 actually gave instructions how to push start the car.

 

[itsdiz]

I just went to Rock Auto and compared - 1965 shows two holes, 1966 one hole so I am reasoning that because the early style has two pumps - front and rear - there are two holes. As I said there are two holes in the valve body. I think the PO changed the filter while he had it because it was like new, BUT it is the later style with just one hole/single pump trans. That is how I remember them being on my 1970s slant six cars. I got mine from Oreilly's and they also had a WIX kit with both types of filers in it. The main reason I did this is because it had a slight leak around the edge of the pan. I tried retorquing but that did not help. When I removed the pan I found that it had a rubber infused cork gasket, and of course this later style filter so I am glad I changed it, mine came with a solid rubber gasket. Another leak that I had repaired earlier this year was due to the shift cable housing getting melted against the exhaust. I got lucky and found one in a salvage yard while traveling through Minnesota earlier this year.

 

[itsdiz]

O.E in the 1963 and earlier years . Also had inline filters in the transmission cooler line. Bought a 63 Valiant, had both when I serviced it

I had a 1961 Valiant with 170 slant six but it did not have an inline filter. I do see Rock Auto actually sells them.

 

[Vaanth]

I have a question for the transmission experts - I thought I knew 904 Torqueflites pretty well, I have owned several slant 6 cars with them and even rebuilt the one on my 1960 Valiant back in the early 1990s. I bought a filter and gasket kit to service mine on my 1965 Barracuda with 273 V8. The new one had two holes - one feed, one return? - and was smaller than the old filter which only had one hole. I looked at the valve body and there is two holes in it so I went ahead and installed the new filter. I was not aware there were two styles, anyone have any information on this?

A transmission filter with one large hole, or with one large hole and one small hole, can be used in 1966 and later Torqueflite transmissions, both A904 and A727. A filter with one large hole and one small hole must be used in 1965 and prior Torqueflite transmissions. The smaller second hole is the feed for the rear pump.

A few filter types have been used in the Torqueflite transmission. Originally, an inline filter was used in a cooling line accompanying an internal brass screen filter.

In 1964, the brass screen filter was replaced by a new filter element using Dacron as the filtering media, part number 2466859. The inline filter was also dropped with the change. The Dacron filter captures contaminants better than the brass screen, but requires periodic changes depending on vehicle use. The inline tube filter also requires periodic replacement, but the brass screen can be cleaned and re-used. The brass screen flows more than a Dacron type, but its original use relies on the inline filter to further clean the fluid. The Dacron filter can be used to replace the screen and inline filter on earlier models.

For 1966, the rear pump was removed from the Torqueflite. The same filter was used until 1968 when the smaller hole was removed in original production filters, starting in November, 1967, as part number 2801655. Aftermarket filters usually have both holes for extended coverage. The filters with one hole cannot be used in 1965 or prior transmissions. If it is installed, the transmission will display erratic shifting and a clicking noise, ultimately leading to scoring of the rear pump.

In 1973, The filter area size was increased as part number 3515996. An indentation was added to the floor of the pan for more clearance around the larger filter. The larger filter can be used with the earlier flat pan, and was made the new service replacement for earlier units. The larger filter will cause an interference fit on the earlier pan, but is acceptable for use. An updated, small two hole filter, part number 3621456, was released for 1965 and earlier Torqueflite transmissions.

The following image shows the Dacron and screen filter types, small and large, plus two hole and one hole versions.

Note, if using a brass screen filter, depending on the filter design, a gasket can be required for proper seal against the valve body. No gasket is required for the Dacron filter type.

 

[itsdiz]

A transmission filter with one large hole, or with one large hole and one small hole, can be used in 1966 and later Torqueflite transmissions, both A904 and A727. A filter with one large hole and one small hole must be used in 1965 and prior Torqueflite transmissions. The smaller second hole is the feed for the rear pump.

A few filter types have been used in the Torqueflite transmission. Originally, an inline filter was used in a cooling line accompanying an internal brass screen filter.

In 1964, the brass screen filter was replaced by a new filter element using Dacron as the filtering media, part number 2466859. The inline filter was also dropped with the change. The Dacron filter captures contaminants better than the brass screen, but requires periodic changes depending on vehicle use. The inline tube filter also requires periodic replacement, but the brass screen can be cleaned and re-used. The brass screen flows more than a Dacron type, but its original use relies on the inline filter to further clean the fluid. The Dacron filter can be used to replace the screen and inline filter on earlier models.

For 1966, the rear pump was removed from the Torqueflite. The same filter was used until 1968 when the smaller hole was removed in original production filters, starting in November, 1967, as part number 2801655. Aftermarket filters usually have both holes for extended coverage. The filters with one hole cannot be used in 1965 or prior transmissions. If it is installed, the transmission will display erratic shifting and a clicking noise, ultimately leading to scoring of the rear pump.

In 1973, The filter area size was increased as part number 3515996. An indentation was added to the floor of the pan for more clearance around the larger filter. The larger filter can be used with the earlier flat pan, and was made the new service replacement for earlier units. The larger filter will cause an interference fit on the earlier pan, but is acceptable for use. An updated, small two hole filter, part number 3621456, was released for 1965 and earlier Torqueflite transmissions.

The following image shows the Dacron and screen filter types, small and large, plus two hole and one hole versions.
View attachment 1716492206

Note, if using a brass screen filter, depending on the filter design, a gasket can be required for proper seal against the valve body. No gasket is required for the Dacron filter type.

Great information! I am glad now that I changed it as the PO clearly had put the wrong one in. Luckily it appears to have been done recently, and I have not driven the car but a few miles since I got it a year ago. The PO also did not drive it very much during the 4 years that he had it, only going a couple miles to town a few times a year.