[QUOTE=gsxr;2144191]Wow, this is an old post! I edited the original posts to update the information. Anyway:
Yes, ASD has LSD (with 35% lockup at all times) at the core. The hydraulics simply exert pressure on the LSD clutch pack to make the lockup 100%, up to 19mph, at which point the hydrualics release. As the clutch pack wears out, the lockup percentage will reduce. The FSM procedure shows testing it with a torque wrench on a lift, with ASD engaged manually, the torque needed to turn one wheel separate from the other should be at least 100Nm higher than when ASD is not engaged.
I found a factory brochure which details the functionality of both ASD and ASR, I will scan that and upload it to my website. It does a better job of explaining how it all works than I could.
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Dave, will you post a link when you get it scanned? I would like to read it. Any idea how much work it would be to add ASD to my wagon. I believe the SLS pump is used, so that is in place. I suspect I would need to add a feed line the the differential and the of course change out the differential. I believe in '88 it could be order with it.