There should be NO gear whine, if there is, its most likely the pinion depth is set too deep and you really dont have any slack. Me and my dad installed the 3.73s in my 04 and we actually didnt have to shim anything, just swap the spacers that hold the carrier in. They apper to be the same thickness, but the way it came out it would not go back in so we put the left one on the right and the right on the left (same thing in 00 V6 W/ 3.73s...but in my car my dad was going to show me that it didnt fit since i had to step away for a second and when he went back in it fit...he actually didnt switch them on purpose like we did last time LOL) tightened it up checked everything out (ie slack in the rearend and pinion depth) then filled with royal purple and NO WHINE. May have had a SMALL amount on our first test run(only after letting off at about 50-55MPH), but the tires make some noise sometimes too...probably wearing the paint off durring the initial breakin, but after that there has been 0. I love not having to take anything to the shop, saves a TON of cash.
knock knock ... anywayz cant really speak of the power diff. havnt laid in it yet... it feels like there is power to be had, i hope so!
