Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community - FT86CLUB - View Single Post - Considering going to 3.727 gear/pinion in 6MT

azian_advanced · 06-01-2012, 09:21 AM

Here's the difference in speed while cruising at 75 mph between the 3.727 (shown as BRZ P-MT FD1) and 4.1 final drive gears (shown as BRZ P-MT FD2) between the manual transmissions. The canadian version is here.

depending how much time you spend cruising on the freeway, the 300 rpm difference between the FD gears may not be worth it for the fuel economy difference and the payback period of buying and installing the FD.

but if the transmission gear shafts between the AT & MT are swappable, then you're looking at a much better difference.

06-01-2012, 09:21 AM	#33
azian_advanced *****istrator Join Date: Apr 2010 Drives: 2013 Scion FR-S 10-Series M/T Location: Calgary Posts: 354 Thanks: 137 Thanked 337 Times in 90 Posts Mentioned: 4 Post(s) Tagged: 0 Thread(s)	Here's the difference in speed while cruising at 75 mph between the 3.727 (shown as BRZ P-MT FD1) and 4.1 final drive gears (shown as BRZ P-MT FD2) between the manual transmissions. The canadian version is here. depending how much time you spend cruising on the freeway, the 300 rpm difference between the FD gears may not be worth it for the fuel economy difference and the payback period of buying and installing the FD. but if the transmission gear shafts between the AT & MT are swappable, then you're looking at a much better difference.