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
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
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?
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.
Check in with Mike's Transmission in Lancaster, CA. They build some of the best Powerglides in the country. (661)723-0081
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.
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.
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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