I looked at a parts-store website to see the shape of the transmission pan gaskets. I believe the 700R has a flat pan, the 350/400 (?) has a flat pan with one corner 45'd, and then the others I didn't pay much attention to. All of mine have been 700R4 transmissions.
I'm a newb, helping a buddy build a '77 caprice wagon. Our rules are pretty strict, so I'm trying to see what we can do to keep the back end of this thing from going down. I've seen a couple of picture of the frame notches, but I'm trying to determine the location of the notches. I'm also looking for suggestions on how to pre bend this thing. It's already sitting kind of low in the rear also, I'm thinking the coils have gotten weak, any ideas there? Leafing is not allowed here. Thanks for the help.
My rules are strict also and state no notching so I dimpled my frame right after the wheel hump in and then again about 12-18 inches from the bumper mount right under the foot well for the rear seat. for the springs I took out the old ones and replaced them with the front springs from a mid 80" g-body car (we used to race hobbys so I have a lot of them). They are tall, stiff and just barely fit with the stock shocks and seem to jack up the rear a bunch. To pre bend I put it on the trailer and chained it down tight at the rear dimples and then used a porta power to jack up from the rear shock mounts and bent the frame up. This is the first time I have run a wagon so I hope that it is enough.
I have also been told to bend the body at the gas filler door by putting a jack in the window and jacking up the roof and the fender down on both sides. I cannot do this because of my rules but it looks and sounds like a good idea. I might just beat the tar out of mine with a sledge after tech.
Last Edit: Jun 24, 2012 16:11:08 GMT -5 by goinpos2l
I have been told that even with the notches on 80s GM cars, you must still be smart with your hits to start them bending in right direction. I had Cadillac that bent up like it should have but because of a flat tire and a hard hit, it bent up which shoved the bottom of the rear hump inward as well. Depends on your luck and how you manage your hits, but I think those above dimples look sufficient enough. I have my notches cut about that big. I have done my notches about 6'' in and then 2-3'' in front of those. Make sure you cut the stiffening ribs built into the body floor.
on the bubble buick wagons has anyone ever cut a pie slice out of the rear frame rails like a notch and jacked it up and rewelded it. if you did,did you have good luck with it or did u weld it and then double dimple it. this is my first wagon and i am kind of curious to see if it works out. thank you for all your help.