Shift motor on Dana 30 - JeepForum.com

 
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post #1 of 7 Old 04-15-2002, 08:05 PM Thread Starter
Coot
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Shift motor on Dana 30

I checked the shift moter for the lockouts on my 92 YJ with a vac pump as the Chilton's manual says. Seems it works fine, but it never unlocks.I looked over the vac lines to the transfer case seems ok. When the vac lines are unhooked the lockouts disengage. Any ideas on why the thing isn't working?


92 Jeep YJ, 4 Banger, Cold air intake, Electric fan, 1 inch motor mount lift, 8.8 rear axle Limited Slip 4.10's, SOA, 2 inch body, 35x12.5 Pro Comp MT on 15x8 AR-767
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post #2 of 7 Old 04-15-2002, 08:29 PM
Bob K
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In order to disconnect one of the vacuums must release vacuum. Look for a clogged line. Or replace the vacuum switch on the transfer case. I think it costs less than $10 and takes a few minutes to change.

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post #3 of 7 Old 04-21-2002, 07:21 PM Thread Starter
Coot
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Could someone take a look at there vac lines.
Two go from the shift motor and two more come from the engine compartment all four to the transfer case. Here is where I need help, up in the engine compartment one goes to the throttle body which makes since. But the other loops behind the battery tray. Should this one be hooked to something? this is on a 92 YJ with a 2.5 5 speed. Thanks...

92 Jeep YJ, 4 Banger, Cold air intake, Electric fan, 1 inch motor mount lift, 8.8 rear axle Limited Slip 4.10's, SOA, 2 inch body, 35x12.5 Pro Comp MT on 15x8 AR-767
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post #4 of 7 Old 04-22-2002, 06:29 PM
ErikJordan
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the one going behind the battery tray is a vent, and should have a plastic protector to keep dirt out. thats it

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post #5 of 7 Old 04-22-2002, 09:21 PM
Wildbill
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Hey Coot,

I had problems with my '92 YJ right after I bought it and I went crazy looking for a proper picture of the vacuum harness. What I concluded was that four lines come from your T case. 1 goes to your vacuum manifold, 1 goes over to the battery area and is a vent and should be bent down. the other 2 go to the motor. 1 engages and 1 disengages. Can't remember which is which right now but is easy to figure out.
What I did was to raise all 4 wheels off the ground and place on jack stands. Engage your T case and see if your front axle engages. You can also do this manually with a vacuum checker.
What I discovered is that the vac motor will seize if you don't use regularly. Don't buy one from the dealer if it is bad you can get the same Spicer/Dana motor from 4wd hardware for about $100 buck less. Hope this helps e-mail if you still need anything explained.

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post #6 of 7 Old 04-22-2002, 09:55 PM
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<img src="http://www.binaryinc.org/images/jeep/jeep_vac_diagram.jpg" alt="" />

HOPE THIS HELPS

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post #7 of 7 Old 04-25-2002, 06:03 AM Thread Starter
Coot
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Thanks everyone,now off to Clayton this weekend.

92 Jeep YJ, 4 Banger, Cold air intake, Electric fan, 1 inch motor mount lift, 8.8 rear axle Limited Slip 4.10's, SOA, 2 inch body, 35x12.5 Pro Comp MT on 15x8 AR-767
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