Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community - FT86CLUB - View Single Post - Installed 3.91 rear diff from Lexus is300- amazing

MotoX16 · 09-17-2019, 01:15 PM

I'm turbo'd on a 2017 with the 4.3 diff. Would it make a noticeable difference to swap to the 4.1 diff? Can I just swap internals or do I need a whole diff?

My second gear feels really short now and I'd like to drop my hwy rpms a little.

TIA

09-17-2019, 01:15 PM	#58
MotoX16 Senior Member Join Date: Jan 2019 Drives: 2017 Subaru BRZ Location: Minneapolis, MN Posts: 199 Thanks: 62 Thanked 95 Times in 54 Posts Mentioned: 1 Post(s)	I'm turbo'd on a 2017 with the 4.3 diff. Would it make a noticeable difference to swap to the 4.1 diff? Can I just swap internals or do I need a whole diff? My second gear feels really short now and I'd like to drop my hwy rpms a little. TIA