I bougth a new stainless steel transmission vacuum line for my 70 gs455 /th400. (75usd from rightstuff) I have no idea how to get it to fit. Anyone have some pictures of this ? Picture of transmission vacuum modulator and engine intake would be great. Thanks !
Eivind, Do you have an assemly manual? Look in the transmission section. It fits into the vacuum modulator on the right side of the trans. If it is the big old style modulator with the fitting on the side it slides in and you use a short piece of rubber hose thatfits tight over both fittings. The fitting on the back of the intake manifold also slides in and is covered with a short 1" pice of hose that covers both fittings.If you have one of the new gold modulators it will just connect with a pice of hose and will not insert.
Yes i have a manual, i think it is a "1970 buick chassis service manual "i will look there. The modulator is the new type (gold). I may adjust the vacum line a bit. I will try. Thanks Dave !
Many times when lines are shipped, they are bent to fit a certain size box. Then when you get them, you straighten or adjust them. The longer the line, the more chance it was bent. Carb to fuel pump lines they usually never bend. Because your line was going far, it's likely they bent it a bit to save you SH $$. You will probably need to tweak it to fit. There also MANY different styles of modulators. I don't know exactly what SHOULD be on your car, I'm sure Dave (copperhead) does. There was a large one (blue or black, repros gold) about 6" long with a 90 degree vac fitting on it. Many times those are replaced with a short, gold, maybe 3" long modulator with a straight fitting. If your modulator is not the same configuration as original, it will never fit perfectly. But you should be able to tweak it, or extend the hose a bit at the mod end to fit.
Thanks Frank. The most important for me is to find out what end goes to intake or modulator. Then i will bend it to fit. I will take a closer look when i come home.
I think those lines come non bent. The bend with the cane shaped end is the top. That will slip into the intake fitting. It will need to be connected with a longer piece of hose at the modulator. You can still buy the stcok style modulator from Rock auto I thing. Standard part #TM17
I have now installed the vacuum line. When installing the correct way the line that was supposed to fit the vacuum regulator pointet directly to the right side, so i had to bend it 180 degrees to get it fit. Thanks for all response.
