Join Date: Sep 1999
Location: Southeast Iowa
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Front Axle Disconnects
[img]/wwwthreads_images/icons/smile.gif[/img] In response to the question by Jeepnut about the use of electricity as a front axle disconnect; let me just make a comment. FIRST....vacuum has been used as a shift-assist since before WWII. As a kid, I learned to drive trucks equipped with vacuum shift two-speed axles, and my buddy had a Columbia two-speed vacuum shift rear axle in his Model A Ford coupe. The HUGE advantage to vacuum, IS that the power of the vacuum pot is INVERSE to the engine horsepower being applied to the gear train. When the engine is pulling, vacuum is low, so the system will not shift and move a gear or a clutch under power and chip something. When power is minimal, vacuum is at a MAXIMUM, and that's a perfect time for the shift to take place. When you use electric, PRESELECTING is dynamite! You can easily burn out a servo or blow a fuse if you select, then don't let off so the shift can take place. So you see, vacuum is the PERFECT source for something like a shifter. Finally, using a TANK cancels out the effect of the engine vacuum being low under power and high under light pulling, and you will risk damage if the mechanism tries to shift under too much power/torque. This is one time that the factory guys have it right, and have for many years.[img]/wwwthreads_images/icons/crazy.gif[/img]
Quadra-Trac modified by the crack moonguy[img]/wwwthreads_images/icons/wink.gif[/img][img]/wwwthreads_images/icons/smile.gif[/img][img]/wwwthreads_images/icons/tongue.gif[/img] transfer case team.