I replaced the factory auto locking hubs on my 02 f250 superduty with superwinch premium manual locking hubs still don't have 4x4 drive. do i need to block the vacuum line to the front hubs in order for the dash switch to work the transfer case? any ideas will be greatly appreciated
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Unlike the 97-03 MY F-150s, the 04-08 MY use vacuum to hold the IWE ( Integrated Wheel End ) out, and once vacuum is removed the IWE spring engages the gears to lock the wheels to the front axle.
I have not seen a replacement front axle with manual hubs yet, checking Warn's site. Maybe check with Warn, but from the application list, 1996 was the last F-150 hub conversion kit they make. SuperDuty is 04, but that is an option from Ford up until 04.
I have the same hubs on my truck as what you have. I have been told it can be done you just have to know if you have a dana 50 or 60 front axle. The warn hubs i'm sure are a better quality hub but if your worried about the auto feature of your current hubs. That is vacuum accuated when you 4 wheel drive is engaged. And there fore vacuum engaged. Mine used to work great but after a lot of mudding sand got into seals and vacuum didn't work anymore so i treat them as free/lock hubs.
you can convert auto to manual hubs warn hubs or milemarker makes good hubs. As far as lift a suspension lift is better. This really depends on what you want to do with truck. I had a 97 f250 diesel 4x4 and put front leving springs on it and new poly spring bushings and was able to clear 35" tires on factory wheels. The best exhaust upgrade is going to be a new down pipe from turbo to exhaust as far as straight pipe or muffler it depends on personal preference