Repair question
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Senior User
Joined: Oct 2015
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Repair question
I had my dealer replaced a front u-joint last week. Over the weekend I found I had no 4wd with the hubs in auto mode but did have traction when I locked the front hubs.
Bad u-joint install?
Bad u-joint install?
Senior User
Joined: Jul 2015
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This is one place I'm glad they kept the manual option.
New User
Joined: Oct 2018
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Hopefully they get it sorted out for you. I have had to replace the front axle seal a few times, when they leak (or any other leak in the vacuum system) the system can't pull vacuum to lock the hubs. It is usually an easy fix, although replacing the front axle seal does involve some labour...
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5th Wheeling
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Check for a plugged vent line. Diff pressures up when driven?
Laughing Gas
Joined: Dec 2016
Posts: 781
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From: Knightstown Indiana
It’s a vacuum pulse signal to pull in the hubs in 4x4 auto, so it shouldn’t blow anything, or build pressure, and the vent is on the diff, which is a separate chamber/part of the axle. I’d guess that some moving part within the hub is installed backwards or in the wrong Seanad is pushing the seal. But back to what Jim said, if it occurs when they’re manually engaged that points to an assembly issue.