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Transmission Vacuum lines in engine compartment


Deluxedave

Active Member
Joined
Mar 2, 2010
Messages
41
City
Burnsville, Mn
Vehicle Year
1986
Transmission
Automatic
Cruise Control Vacuum lines in engine compartment?

I have an 86 Bronco II with an automatic transmission and a 2.9 V6. When I got it, it was missing some vacuum lines from the engine compartment. I have the "engine" related vacuum lines routed based on my 87 Ranger's configuration.
The Ranger is a 5 speed, so I think the other missing lines must be related to the transmission. There is a round box inside the driver's side wheel well that has 4 vacuum nipples and has a cable that connects to the throttle position area. Two of the nipples have a short hose connecting them to each other and two are not connected to anything. I think one of the nipples should connect to a line that comes out of the firewall, but I am not sure.
I tried to find a picture, but I am not even sure what the box is called.:icon_confused:
 
Last edited:
Is this possibly related to the cruise control? I found some other docs in the tech library that make me think the cable connected to the "box" may be a cruise control cable.
 
Probably cruise.
I have an '86 ranger w/ 2.9 auto. I will take pics of the engine compartment.
Richard
 
I believe if it has the cruise control on the speedometer cable there will be a junction with some wires coming out the speed sensor either on the cable coming out of the tranny or in line that tells the control the vehilcle speed and a vacuum servo controls the throttle
 
Pic #1]
worktruck354.jpg

The line above my forefinger is coming from the cruise to a bulkhead fitting.
Pic #2]
worktruck353.jpg

Hard to see, but the line with a yellow strip, coming from the cruise goes to the bulkhead fitting.
Pic #3]
worktruck355.jpg

The line in my fingers is coming from a manifold vacuum tree [drivers side near firewall] going to a steel line [passenger side between rear of intake/passenger side head and firewall, easy to not see] leading to [I ASSume] the tranny vacuum modulator,
I'm not familiar with these trans so take this info with a grain of salt.
Hope I helped, and I can take more closer pics if needed.
Richard
 
Richard, thanks for the pictures. It looks like what I need is to know where all of the cruise vacuum lines go. At this time all I have is the short line that connects from the rear of the cruise to the front. I need to know where the two other lines are supposed to go.
#1 - the nipple faces the fender (the 3 o'clock position as viewed from the front) Does that connect to the bulkhead as shown in your pictures or to the vacuum tree?
#2 - the nipple that shares a connection on the front side of the cruise box and faces the engine. Does that connect to the bulkhead as shown in your pictures or to the vacuum tree?

Thanks for the info.
 
Here's a another pic;
worktruck360.jpg

I think you should be able to follow the lines, but, the line closest to the motor goes to the firewall, and the other goes to manifold vacuum tree.
:icon_cheers:
Richard
 
Richard, Thanks for the info and great pictures. I now have the lines routed correctly.
 

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