My bad, i thought the final drive was off by a small margin. USDM ITR tranny has the same final drive as the GS-R tranny but with shorter 2nd-5th gears. The GS-R has the same gearing as the LS tranny in 1st and 2nd but much shorter 3rd-5th, and a 2-3% shorter final drive. The ITR tranny will keep ya spinning high on the freeway (3500rpm at 60mph), but the gearing means great acceleration and the LSD is great also. If you can afford it, get your hands on an ITR one. It bolts up fine but you might need different axles or shift linkage or something, I dunno. But it does work without too much trouble.