Changing individual gear ratios?

[CrankyOldMan]

Originally Posted by Jason@SportsCar

With the xD FD not really being an option due to bearing/shaft size, and I want to use my OS Giken LSD, I wonder if the 3.9 FD from the C150 in the Paseo would be a better option? I think that might only be a 6 bolt. How about the 4.0 from a C52?

I would stay away from the C15x series, since they're 6-bolt. Unfortunately, my research hasn't turned up anything in the C5x series with a ratio other than those on the Yaris and xB, but I've also never torn down a C52.

The output/pinion shaft bearing has the same OD, it's just a different ID. Easy to swap with a blind bearing puller. As far as overall dimensions go, the Matrix and Celica differentials seemed to fit just fine--the axial length between the taper bearings looks to be identical.