as a few of you probably know already i did a 4.30 gear swap a few weeks ago. the question i have is that i noticed on a comment in one of the other threads that something called "friction modifier" should be added to the mix when you put the gear oil back in. i have never heard of this stuff thus i did not add any obviously this stuff makes it more viscosic correct? where do i get it and what is the best brand to get? how much do i add? thanks guys
Go to any local Ford part dealer!, somebody recently wrote in a thread that synthetic gear oil already has friction modifiers in it, but using more doesn't hurt. I understand you use a whole bottle Ford Racing Performance Parts [Differentials]
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96GT:BBK CAI,X-Pipe,plenum,75mm TB,JBA wires, Accel coil packs, SCT X-Calibrator II Dyno-tune, 180termo,Centerforce Dual-Friction clutch, Hurst Billet Shifter,FR(ceramic coated)shorty headers, 3.73 Gears, Magnaflow Cat Back(3.5 tips), FR handling kit,Bullit wheels: 18x9, 245/40/ZR18's front, 18x10, 285/40/ZR18's back,190gph FR fuel pump, Maximum Motorsport subframe connectors, Full PI swap. 246rwhp,288trq.
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"Drive It Like You Stole It"
Question regarding recent gear change 
obviously this stuff makes it more viscosic correct? where do i get it and what is the best brand to get? how much do i add? thanks guys
