where to get replacement seals for speedo cable into transmission

[Lasalle]

1973 Dart 904 automatic transmission. It is leaking trans fluid where the speedo cable goes into the transmission. Who sells the replacement seals for this? I am going to replace the pan gasket also, so while the fluid is drained I want to replace the speedo gear seals. Thanks

 

[lkopaska]

Stop by any local trans shop they should have the seals left over from used kits.
Lon

 

[RustyRatRod]

Brewers.

 

[Lasalle]

Brewers seems to focus on manual transmissions. Mine is automatic. Are the seals I need the same?

 

[MoparMike1974]

Yes the manual uses the same speedo adapter housing I believe. You might be able to find the seals at rockauto. I know they sell individual trans seals such as dip stick o-ring etc.

Yes, rockauto has them. They are called "speedometer pinion seal". I dont see the big O-ring. They are usually ok, its the small center seal that usually leaks.
1971 DODGE DART 5.6L 340cid V8 Speedometer Pinion Seal | RockAuto

I would suggest replacing the shift shaft seal while your at it. This is the first place a 904/727 leaks from and is usually misdiagnosed as a pan gasket leak.
There is a special tool that makes this easier to replace with trans in car but it is possible to just use a socket. It helps to drop the crossmember to let the tail come down some. That buys a little more room.

 

[Hellrats]

A&A Transmission

 

[65TerrorCuda]

Advance had them in stock at two locations in my town, $3 ea, for a 904, picked up in 30 minutes. Old seal is sitting outside bag

 

[Lasalle]

Thank you for your reply. I successfully replaced the speedo seals, the shifter shaft seals, and the pan gasket back in May. I got the seals from A&A transmission.

 

[65TerrorCuda]

Thank you for your reply. I successfully replaced the speedo seals, the shifter shaft seals, and the pan gasket back in May. I got the seals from A&A transmission.

Well done.
I need to do shift shaft seals on a pushbutton 904 one of these days