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Powerglide Question

Discussion in 'The Hokey Ass Message Board' started by PalmdalePsycho, Apr 7, 2010.

  1. PalmdalePsycho
    Joined: Oct 25, 2007
    Posts: 22

    PalmdalePsycho
    Member

    My powerglide in my 64 impala is leaking around the outer bottom of the front pump and im not to familiar with them, my question is, is there an o ring around the front pump or is it a machined surface or if you can just put silicone around it? And if it is an o ring, does it all have to come forward to replace it? Im pretty sure its not the front pump seal. Can take pics if needed cuz i pulled engine out yesterday for something else.

    Thanks
     
  2. Hnstray
    Joined: Aug 23, 2009
    Posts: 12,241

    Hnstray
    ALLIANCE MEMBER
    from Quincy, IL

    If I remember correctly, there is an "O" ring around the front pump perimeter, (the 'flange through which the bolts pass) and it will need to be pulled forward to replace the "O" ring. What I DON'T know is.......whether you can just pull it forward without any other consequences or not. Better talk to a tranny specialist first, or consult a shop manual.

    Ray
     
  3. PalmdalePsycho
    Joined: Oct 25, 2007
    Posts: 22

    PalmdalePsycho
    Member

    Is the seal retainer for the front pump seal important? I cant find a place to buy it, and do a lot of people run the tranny without one?
     
  4. 56sedandelivery
    Joined: Nov 21, 2006
    Posts: 6,695

    56sedandelivery
    Member Emeritus

    Powerglides had some "odd" sealing methods. There is an "O" ring around the pump housing that seals it within the case. There is also a paper gasket that goes between the pump housing and the case. Here's where it gets "odd"; there are two different methods of sealing the pump to case BOLTS, a tiny "O" ring for each bolt, or a rubber sided washer (both sides of the washer). Could it be the converter/pump seal that's leaking? The other bad source for oil leaks with the Powerglide, is the kickdown linkage where it goes through the transmission shift lever arm. There is an "O" ring seal and a special washer setup at that point; and it commonly leaks. The pan can be warped, or the pan bolt holes stripped, especially the forward holes. The extension housing takes another "O" ring seal, as does the speedometer bullet. Clean everything up, put some fluorescent "dye" in the fluid, then check for leaks with a black light. Butch/56sedandelivery.
     

  5. 150J/F
    Joined: Jan 2, 2010
    Posts: 239

    150J/F
    Member

    Check in with Mike's Transmission in Lancaster, CA. They build some of the best
    Powerglides in the country. (661)723-0081
     
  6. fran0216
    Joined: Apr 22, 2010
    Posts: 10

    fran0216
    Member
    from alabama

    Here is a diagram of the front/rear pump with the O ring. This is for a CI powerglide and yours is probably the Aluminum PG, and I don't know if they are the same.

    frontpump.jpg

    rearpump.jpg


     
    Last edited: Apr 28, 2010
  7. ocfab
    Joined: Dec 26, 2007
    Posts: 678

    ocfab
    Member

  8. Ratfink749
    Joined: Nov 16, 2008
    Posts: 89

    Ratfink749
    Member

    If you look closely at the picture you attached.. it is of a REAR pump which some PG's were equipted with. As far as I know, the front pump can be removed without pulling the pan. you'll need a paper gasket to seal the fluid passages to the case, an O-ring for the outside of the pump, and for good measure a new torque converter seal. If you do this, I reccomend getting the transmission nearly vertical (pump side up) so once the pump is removed, everything inside stays in place. Also, If I recall correctly, a couple of the bolt holes in the pump are threaded for a slide hammer to screw into. This makes pulling the pump out a snap! I've been in a couple 'glides but it has been a while.
     
  9. 56sedandelivery
    Joined: Nov 21, 2006
    Posts: 6,695

    56sedandelivery
    Member Emeritus

    AND, for reinstalling the pump, it's helpful to use a couple of alignment dowels to guide it into the case, and hold the gasket in place at the same time. A couple of long shanked bolts, with the heads cut off, will do. I build Powerglides for the local Bracket Racers, and they are an easy trans to work on/overhaul. Butch/56sedandelivery.
     

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