shawscove928s

I have tried the search function, but it didn't find any matches. Which is hard to believe knowing this has been discused so many times on this forum. My search failure is most likely due to operater error on my part.

My 86.5 auto is shifting hard so I want to check the vacume lines to it. The work shop manual diagram shows this line and another going down the drivers side just off center of the back of the engine from the vacume manifold. But my lay out seems to be different. I only see one line going over the bell housing in that location and I think that one is the one connecting to the EZF control. Can one of you please ( Hoefully Roger will chime in too) help me locate the line that goes to the transmission. I have the air box etc. removed and it appears that the trans vacume line is routed towards the pasenger side but dosn't seem to pass over the bell housing or go down the back of the engine.
Thanks in advance.
Ray

stolarzj

Mine is plugged into the back of the drivers side of the 4 way tee and runs down the drivers side of the bellhousing.

Tom in Austin

This may help, a picture of an automatic transmission (driver's side). The vacuum modulator and hose are on the driver's side of the trans, and you can see the hose go up and through some kind of opening at the top of the case. From there, it travels along the top of the torque tube, where it comes up over the bellhousing to connect to the 5-way connection.

Hope that helps ...

the flyin' scotsman

Ray.............there should be a 7 way vacuum splitter at the back of the engine block............one of the outputs feeds the auto tranny.

There's a diagram in the WSM

shawscove928s

Thanks Tom. That picture is worth a 1000 words. I now know where it connects to the transmission. Does the rubber line just slip fit on the modulator, is there a connecter or gromet , or does it just connect like the rest of the vacume lines over the fitting?

Thanks Malcolm. I have that diagram as well as others, but none of them reflect how my vacume lines lay out. I wonder how many different lay outs are there for a 86.5.

As usual, Rennys are the best.

Bill Ball

The hose is just slipped on. You could reinforce that with a small tie wrap if it's not real tight. If the hose is on, you should find the forward end of this line on the 7-way connector in the engine compartment and test for vacuum seal. Remove the air filter box and look for the 7-way connector underneath. Best to remove the MAF too. It's held on by a screw clamp around the base usually accessible from the passenger fuel rail with a LONG, thin screwdriver. Handle the 7-way gently as you don't want to pull the vacuum source off the top of the throttle housing under the intake. If you do, it's fun with mirrors and small hands to locate the source and get the hose back on. Anyway, figure out which one is the feed to the tranny. It disappears down under the firewall, running over the top of the bellhousing. You might be able to see where the hose fits onto a metal tube fastened to the bellhousing that runs the length of the torque tube to the final section of hose. Make sure that is on if you can see it and don't pull it off. Anyway, pull a vacuum on this line using something like a MityVac tool and see if it holds vacuum. It should, although a SLOW loss of a vacuum should not be a problem. If it doesn't hold vacuum and the lines are intact, then go back and test at the modulator. It could have a split diaphragm.