Was a bit on the fence about 4.10s or 4.56s so I decided to go a bit high and I'm very pleased with the result. Fresh bearings, seals, 4.56s, trutrac in the rear, and some new 3" mandrel exhaust with a black mbrp 4" tip







Waiting for break-in was painful, especially with all the hondas running around near my work, but I stayed out of the throttle and after a good 600 or so miles of driving like an old lady I finally got on it a bit. With a 31" tall tire and heavy *** 22s I think the 4.56s worked out perfect. Runs around 2300 rpm at 65 on the highway but holy crap did it wake up down low 1-2 shift occurs under 40mph and I'll be damned if 2nd gear isn't actually entertaining now. Really made the truck feel lighter and I barely lost any mileage, maybe 20-30 miles/tank but that may come back after another fluid change with synthetic. I know it sounds like a bit too much gear but with our altitude up here and the wheel/tire combo I'm really happy with the result, now I want a 3000 stall and a cam swap

 

Just wanted to let you know that the manufacturer of the true trac does NOT recommend putting synthetic fluid in with it

 

That's the way I would have went if I had a heavy SUV, excellent choice. Lugging them on the highway will burn just as much fuel as revving them a little more.

 

This is true.. run regular ole dino oil..

 

Actually they recommend using standard oil as synthetic has no benefit to the overall function of the limited slip as it is a helical gear unit, not a clutch type which requires some form of friction modifier. Running synthetic fluid will not in any way, shape, or form adversely effect the function of the unit I just prefer the slight bump in fuel economy by running synthetic. I confirmed this with eaton years ago when I started selling and installing them religiously on certain differentials.

Averaging a bit over 14mpg right now, mostly city and driving like a bit of a jackass. Can't wait to see how she tows with the 4.56s.