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Unread 09-12-2009, 12:59 PM   #1
jbach
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1999 TJ Wrangler 
 
Join Date: Nov 2008
Location: KY
Posts: 693
vacuum axle disconnect. i know i know.

guys i have a question. i'm sure it's been covered somewhere but i want some advice. i have the stock vacuum axle disconnect that started not fuctioning properly last weekend. the vacuum switches as it should at the axle, the problem is it just seems to be low vacuum. it is strong off of the motor before it heads down to the xfer case but it's weak at the coupler to the axle. i took the entire harness off and stuck it in the bathtub to see if a had a leak anywhere but couldn't find one. what's next?

p.s. i have a locker in the front so really would like to fix the vacuum system.

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Unread 09-12-2009, 01:19 PM   #2
Truth
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1992 YJ Wrangler 
 
Join Date: Dec 2004
Location: Chicago Heights, IL
Posts: 336
I also have a locker in the front. I have XJ shafts in mine with no disconnect. The front locker is invisible on the street other than a clicking when I turn. Do yourself a favor and ditch the disco. One of the best mods I've done.
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Unread 09-12-2009, 01:48 PM   #3
jbach
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1999 TJ Wrangler 
 
Join Date: Nov 2008
Location: KY
Posts: 693
Quote:
Originally Posted by Truth View Post
I also have a locker in the front. I have XJ shafts in mine with no disconnect. The front locker is invisible on the street other than a clicking when I turn. Do yourself a favor and ditch the disco. One of the best mods I've done.
yeah, really not interested in doing that? what did it do to your 4x4 light? not interested in the locker ratcheting around every turn either. i think the servo at on the xfer case is working properly, i just have low vacuum at the disconnect on the axle. is there supposed to be some type of 1-way valve off of the motor going into the harness? i think it may be my culprit, it is very hard to suck air through. i may just bypass this and see what happens.
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Unread 09-12-2009, 01:53 PM   #4
Truth
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1992 YJ Wrangler 
 
Join Date: Dec 2004
Location: Chicago Heights, IL
Posts: 336
I put the shift fork back on. Rides right over the shaft. Light still works fine, but do you really need a light to tell you you're in four wheel drive?
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Unread 09-12-2009, 02:49 PM   #5
jbach
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1999 TJ Wrangler 
 
Join Date: Nov 2008
Location: KY
Posts: 693
Quote:
Originally Posted by Truth View Post
I put the shift fork back on. Rides right over the shaft. Light still works fine, but do you really need a light to tell you you're in four wheel drive?
no i don't need a light to tell me i'm in 4x4. i would just rather spend money on fixing the problem instead of xj shafts. before i go buy shafts i will just move the shift collar over with washers. you and i have a little different system though. you're 4x4 light is a separate vacuum actuator. mine in in the housing.
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Unread 09-12-2009, 02:51 PM   #6
SteveJcoYJ
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1991 YJ Wrangler 
 
Join Date: Apr 2007
Location: Vineland, NJ
Posts: 1,709
i have a posi-lock i'm selling if your looking to get one Original Replacement Parts PSL920 - 4x4 Posi-Lok for Lifted 87-95 Jeep Wrangler YJ & 84-91 Cherokee XJ, MJ - Quadratec, its a $100 +ship

it came with a d30 i bought, and it was practically new i have all the parts just no box
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