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'88 RX AWD, 4WD doesn't engage....
Posted 15 June 2007 - 11:37 AM
Posted 15 June 2007 - 11:41 AM
Posted 15 June 2007 - 11:43 AM
Are you talking abou thte Difflock switch? You shouldn't hear hissing. Perhaps you're vaccum lines form the solenoids to the actuator are disconnected? or maybe the actuator has a leak? Good news is that the actuator and solenoids are the same as the PT4wd Actautor. It just connects to a different lever on the trans. you can replace it with the actuator from any PT4wd.
okay, so I shouldn't even get a momentary sound of air...hmm. but where is the actuator located?
Posted 15 June 2007 - 11:49 AM
I need to clarify. This is a Fulltime 4wd right? you won't get a 4wd indicator on the dash. You'll get a *diff lock* light if its working. The Hi/Lo is a totally seperate portion of the trans, and should be working regardless of the difflock. Note that even without the diff locked you have AWD via the center diff. But if one wheel begins to slip you will lose power transfer. Do you're heater controls work? can you get air from the Defrost/vent/floor? or just the vent? What I'm getting at is that you may have a vaccum hose disconnected or crimped. Check all theVac lines espescially the one going to the reserve tank and the one going to the solenoids.
Posted 15 June 2007 - 11:56 AM
The solenoids (x2) are located infront of the wiper motor.
The diff lock switch controls which solenoid passes vacuum.
This vacuum source is provided via the vacuum canister located behind the pass side strut tower.
This same canister provides the vacuum to operate the heater controls.
Hope this helps.
(sorry for the double info post G, you just type faster than I)
Posted 15 June 2007 - 03:32 PM
lubing the cable is also a good thing
Posted 15 June 2007 - 04:07 PM
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