this thread has got me all twitterpated

...sounds like something i might like to try in my 85 SD...mine has the 2.88, as opposed to breckman's former 3.07...i have a few questions about this...say i switch from my current 2.88 to the 380's 2.47 diff...what kind of increase in top speed would i see? any? i assume i would almost always need to run it in 3rd gear for city driving to keep it in a decent powerband, for anything under 40-45mph i run in 3rd now....might there be any ill effects on my transmission by doing this? would i be sacrificing much on the low end? right now im pretty satisfied with the low end power, even with starting out in 2nd a lot of the time...first gear is quick, it never runs over 3500rpm before shifting, even with WOT...i dont know what thats about...its always done it though...all other gears shift at around 4500rpm....so what seems to be the general concensus on this swap? think its worth it? a new diff isnt all that pricey, esp. a used one....i think im gonna bite the bullet and try it out, right after i get the beast back on the road...should be interesting at the least