srobbins13

Sorry for the noob nature of this question ... this is my first (and probably only) rebuild on a 4T65E. On this 3-piece oil pump that's inside this transmission, is there anything additional one needs to do to be able to separate the three plates that form the pump body? The pump has been removed from the transmission, but for the life of me I don't see why this thing won't come apart, aside from a small dowel pin running through it. Is this thing just frozen together, or am I missing something fundamental here? Any advice is much appreciated. Thanks.

srobbins13

ok, somebody out there has had to work on one of these things. I'm really in need of a suggestion here.

mrvedit

I know nuthin' about a 4T65E and I therefore called a local trans builder for you. He said you have to drive that dowel pin out as it indeed holds the pump together. He said it can be very tight, but you have to get it out.
Good luck.

srobbins13

mrvedit, if you lived in my neck of the woods, I'd be glad to buy you a cold beverage of your choice. Thanks for the info.

mrvedit

Your welcome.
BTW the info came from Haas Transmission in Dexter, Michigan; a family owned shop for 30+ years with a stellar reputation and friendly service. Its a shame that most people's local trans shops are not nearly as good.

srobbins13

mrvedit - Thanks. Yeah, really a true statement there ... i couldn't even get most shops in my area to even answer the phone, hence my post here in this forum. So, just to share with you my outcome (since you went to the trouble to gather the info for me) I pressed the pin out with my shop press and presto, the thing came right apart. I serviced it, and reassembled it with ease by pressing the pin back in place. I thought this would end up being the right way to go about it, but was afraid to put the pump in that press without some kind of confirmation of the process.

Again, many thanks! Maybe i can pay it forward to someone else sometime.