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Old 07-18-2016, 10:44 AM   #10
JazzleSAURUS
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Join Date: May 2015
Drives: 15 BRZ LTD, 05 FXT
Location: Western MA
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Run Gear 300 in your trans, and you can run EITHER Gear 300, or Gear 300 LS in the rear diff. There is some anecdotal evidence, (from very reliable sources, read: CSG_Mike) that the diff does feel better with the Gear 300 LS, but the difference will likely not be noticeable by the vast majority of users unless you are an experienced driver on the track, pushing the car hard, running the fluid back to back.

I choose to run Gear 300LS in my rear diff since I need to stock both Gear 300, and Gear 300 LS due to my FXT having an R180 in the rear.
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