@ram: well sir, tatas use elcetric shift-on-the fly 4x4 transmissions from borg warner. the initial lot of the safaris had manual hub-locks for the front axle, but the later ones came with fully automatic hub-locks. the shift on the fly is effective for engaging 4x4 H upto speeds of 60 kmph. the rear has a (clutch-type) salisbury LSD, which is available only for the 4x4 models.
the front axle is fixed type, fully floating with exposed half-shafts as drive shafts.
that's all i can recollect from the dissecting i have done on my ex-safari 4x4...if you need any more specific or technical information, perhaps i can look it up..
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