0
the vacuum valve on the transfer case takes engine vacuum, and uses it to engage the central axle disconnect on the front axle when the case is shifted into 4wd. this is also the cause of the slight delay between shifting in/out of 4wd, and the 4wd indicator light turning on/off - real world, on an older Jeep, it takes up to a few seconds, sometimes, for the engine to pull enough vacuum to shift the front axle actuator.
Both the vacuum switch, and the vacuum actuator on the axle are common failures, and there are a number of kits on the market to convert the front axle to use a cable actuator
Wiki User
∙ 13y ago
Add your answer:
Earn +20 pts
What is the black vacuum hose on your Jeep Cherokee coming from the ac control?
That is the vacuum supply for the HVAC control.
What fluid to use on a 1998 Jeep Grand Cherokee transfercase with quadratrack?
ATF+4
Where is the vacuum supply for the climate control on a 1989 Jeep Cherokee 4.0 liter?
It begins at the intake manifold.
Where can you find a vacuum schematic for a 1989 jeep wrangler?
the best place to get that would be at autozone.com. go to the repair maual section and click on emissions and you will find it there
How do you find a vacuum hose diagram for a 1989 jeep wrangler 6 cylinder?
A person can find a vacuum hose diagram for this car by asking if an auto tech will print one out. It is also found in the cars maintenance and repair manual.
Vacuum lines to front axel on 1995 Jeep Wrangler?
diagram from front vacuum motor to transfer case of 1993 Jeep Wrangler
Was there any change in 1987 to the 1989 vacuum diagram in the jeep grand?
I cannot find the diagrams to compare them. If you still have the label glued near your radiator always follow that.
Fuel pump in an 1989 jeep wranglar?
how do i change the fuel pump in a 1989 jeep wranglar
Will a 1989 Jeep top fit a 1998 Jeep?
No
Where is the speed sensor on a 1998 jeep grand Cherokee 44re transmission?
The speed sensor is located on the drivers side of the transfercase, you will see a sensor with a connector, that is your sensor.
Does a 1994 Jeep Wrangler have a PVC?
PCV yes, it's how fumes and pressure is relieved from the crankcase. Look for a larger diameter vacuum hose coming from the valve cover.
What are the release dates for 1989 Jeep Eagle Aloha Bowl - 1989 TV?
1989 Jeep Eagle Aloha Bowl - 1989 TV was released on: USA: 25 December 1989
