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| Engine, Exhaust, Transmission Discuss the FR-S | 86 | BRZ engine, exhaust and drivetrain. |
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09-27-2015, 11:02 PM
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#1 |
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3.7 Final Drive
I did it with my turbo Busa to give me slightly less wheel spin and to give me longer slower revs. I can't locate a final drive that is small like 3.7:1
Help 
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2014 Subaru BRZ
FBM Turbokit: GTX3076R - ECUTEK HRI FlexFuel tune - FBM 3" Turboback Exhaust - 550cc Injectors - Walbro 485 Fuel Pump - 4bar Map Sensor - FBM Oil Pan - ACT SB7-XTSS - AMSOIL all fluids - Forester XT Oil Cooler - Cusco engine, trans mounts - Whiteline rear differential bushings - Perrin shifter bushing - Firehawk 235/45/17 - AEM Failsafe |
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09-27-2015, 11:12 PM
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#2 |
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Search.. Then find the Lexus IS300 final drive. Or buy one from Weir Performance for the 86-92 supra. There is a BUNCH of information on final drives on this forum if you search it using Google. Or buy my 3.91!!
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09-27-2015, 11:14 PM
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#3 |
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Going to this thread
http://www.ft86club.com/forums/showthread.php?t=49288 Pointed me to here http://weirperformance.com/finaldrivegears.html Looks like they may be able to get used 3.73 gears or even 3.58. Probably have to call and see if they have it in stock Sent from my iPhone using Tapatalk |
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09-27-2015, 11:17 PM
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#4 | |
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09-27-2015, 11:18 PM
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#5 | |
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Calm down kiddo. It says it right there on the page "used ratios available" then it lists the 3.58 and 3.73 ratios. Sooooooo Sent from my iPhone using Tapatalk |
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09-27-2015, 11:20 PM
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#6 | |
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| The Following User Says Thank You to fika84 For This Useful Post: | Freeman (09-27-2015) |
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09-27-2015, 11:21 PM
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#7 | |
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No worries. Misunderstanding. Sent from my iPhone using Tapatalk |
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| The Following User Says Thank You to Freeman For This Useful Post: | fika84 (09-27-2015) |
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09-27-2015, 11:51 PM
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#8 |
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Find a lexus IS300 with an M85 differential (3.73) and direct swap that into your car. Problem solved. You can pick them up at various car yards for ~$250 for the whole pumpkin. Weir performance with solid spacer is a good solution too if you plan to rebuild current one.
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| The Following User Says Thank You to kodyo For This Useful Post: | Freeman (09-28-2015) |
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09-28-2015, 08:08 AM
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#9 | |
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__________________
2014 Subaru BRZ
FBM Turbokit: GTX3076R - ECUTEK HRI FlexFuel tune - FBM 3" Turboback Exhaust - 550cc Injectors - Walbro 485 Fuel Pump - 4bar Map Sensor - FBM Oil Pan - ACT SB7-XTSS - AMSOIL all fluids - Forester XT Oil Cooler - Cusco engine, trans mounts - Whiteline rear differential bushings - Perrin shifter bushing - Firehawk 235/45/17 - AEM Failsafe |
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09-28-2015, 08:55 AM
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#10 |
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I swapped in an M85 diff into my FRS. Was a direct fit.
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