So I am doing a 05 USDM 6 speed swap into a 03 WRX and planning on keeping 03 hub and axles for now.
So I need to swap the 3.90 ring and pinion from a R180 I have into a R160 replacing the 3.54 along with the flange to Drive Shaft.
This is from a R160 that I swapped out due to spider gear whine. Just in case I beat it up. Disassembly was actually pretty easy. Gear puller to get flange off, bearing stays popped right off and I whacked out the pinion gear with a rubber mallet.
So the question is if I use only the ring and pinion gear from the R180 put it in the R160 and put everything back together in the same fashion it came out the preload on the bearings will stay the same right? Or will the Backlash be off? I am not planning to change anything but the ring and pinion.
Here is the R160 disassembled.
There isn't any info on doing this anywhere. We need to get some info up.