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- Apr 13, 2009
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- Red Deer, Canada
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I have a habit [bad] of not fully reading/understanding posts, forgive me. All my experience is off road and colors my thinking, again forgive me. Back to your regular scheduled programming....It was on the Aerostar, what's the Explorer got to do with it?
It seems I misread your post, sorry.
That transfer case did come in the Aerostar vans. They used an SLA suspension from the start in '86 and added AWD in '90. Explorers went to SLA in '95 and added AWD in '96. Then the Rangers went to SLA in '98, but never got the AWD.
I can't say that TTB won't handle being DD as an AWD, but I see it as more of an issue with the front axle than the driveline. I don't think it will respond to full time operation as well as a SLA front end. I also think that it might actually make the handling of the truck worse, but it's very possible that I am incorrect.
Reasons that I think this are that the hubs on a TTB were designed for part time use on dirt, not full time use on pavement, so who know how well they would hold up. The bearings in a TTB were never intended to be used in full time 4wd operation, while the live axle unit bearings were designed for the front axles to always be engaged. The TTB front axles shafts use a u-joint, while the SLA uses a CV joint. The latter is much smoother at transferring power over a wide range of speed and angles. There are also other issues that I've read over the years that leave me with the impression that it could be a bad idea, but I can't place my finger on what they were.
I could very well be wrong on all counts. I'm not the one with a TTB truck that wants to try it, so don't let me stop you from experimenting. If you do please start a thread for TTB AWD and let everyone know your results.