Locking Hubs or Differential?
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Senior User
Joined: May 2004
Posts: 392
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From: Las Vegas, NV
Locking Hubs or Differential?
Do the front hubs on a '99 Explorer XLT 4x4 lock and unlock? How about the differential or front driveline (excluding the transfer case)?
Form my testing, the hubs, front differential, and front driveline are always locked/engaged. Only the transfer case engages/disengages the front drive. Is this true?
I get a different answer from different people: the hubs are viscous controlled, the differential is vacuum locked, they are all perminantly engaged, the hubs are automatically locked through a mechanical function. However, I have looked over all the components and tested many scenarios but find the entire front drive system to be always locked up to the transfer case.
Form my testing, the hubs, front differential, and front driveline are always locked/engaged. Only the transfer case engages/disengages the front drive. Is this true?
I get a different answer from different people: the hubs are viscous controlled, the differential is vacuum locked, they are all perminantly engaged, the hubs are automatically locked through a mechanical function. However, I have looked over all the components and tested many scenarios but find the entire front drive system to be always locked up to the transfer case.
Postmaster
Joined: Dec 2001
Posts: 3,742
Likes: 2
From: UT
'91-'94 Explorer front hubs were "locked through a mechanical function."
'95-'96 Explorers have a vacuum controlled mechanism in the front differential
'97+ have "live" axles up front in that there is no mechanism to the front axleshafts from the wheels.
'95-'96 Explorers have a vacuum controlled mechanism in the front differential
'97+ have "live" axles up front in that there is no mechanism to the front axleshafts from the wheels.
