in gen3's the only trucks with 3.08's were a few, rather rare 4.0 2wd's.
on a 3.0 truck (2wd or 4x4) the tallest axle ratio they were built with was 3.45, though 4x4 3.0's were mostly built with 3.73's
(as is my 1993 3.0 4x4)
If your 3.0 4x4 has a "Real" D35 is almost certainly has 3.73 gears.
I've heard many reports of Hybred 3.73's but until someone places one at my feet I'll believe they are as common as Sasquatch, the Chupacabra and the Loch Ness Monster.
The only reason dana made the hybred diff was because Ford was well stocked up with a supply of 3.45 and 4.10 gears for the 7.5" rear axle.
Otherwise it would have been easier to either switch ALL rangers to the 8.8" axle or make 3.55 gears for the 7.5"
AD