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Old 03-07-2004, 01:42 AM   #2
Scooby Guru
Member#: 10757
Join Date: Oct 2001
Chapter/Region: Tri-State
Location: NJ
2013 BRZ Limited 6MT


1. You don't have to flush, just drain as much as you can out and then fill it up. . .3.7Qt's IIRC. You should use 75W90 as that's what is recommended. Our trannies are fickle as it is. I haven't tried shockproof so I can't tell you how well it performs. I put in 75W90NS in the tranny and 75W90 in the rear diff.

2. Most people go to a colder plug when modifying their engine with TBE, uppipe, etc. The colder plug prevents detonation by not heating up as much and igniting early. The NGK part number for 1-step colder plugs is BKR7E IIRC.

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