jl wrote:
Warpspeed,
What ratios are available for the R160 and R180? I could never seem to find anything in the mid to low 3's (i.e.3.50 or lower) for an R160. I have seen some 3.54 or lower for the R180 I believe in a Lexus. that will drop into a 240sx (r180) diff?
R160 is difficult, they are a small diff, usually fitted to small cars with small engines, often with overdrive transmissions. So you will look in vain for any really tall ratios.
I believe Subaru use 3.7 and 3.54 rear R160 diffs in some models and that is about it. R34 GTR uses a 3.54 R160 at the front.
The R180 is more common over a wider range of larger vehicles, but again 3.54 and 3.7 are as tall as I have ever seen.
It is why I finally gave up on the Japanese "R" diffs, and went to a Dana 30, which is about the same physical size as an R180, but ratios like 2.75 and 3.08 are available, and many other ratios besides in the range you are interested in.