Join Date: Jun 2011
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Go with AMSOIL Sever Gear. Great Stuff! I run 75-140 in front and rear. I would burn up Motorcraft gear oil way happier since I switched to Severe Gear.
And ZMANN is spot on [QUOTE=ZMANN;9439153]if u use amsoil u won't likley need modifier
if u have some limited slip chatter around corners then u need the Amsoil LS additive
~1973 F250 Highboy
~2003 F350 Super Duty XLT FX4 6.0 Powerstroke
4.56 Yukon Gears,Detroit Locker,37x13.5x17 Interco Super Swamper M16,8in Custom Lift,Bilstein 5125 Custom Valved Shocks (Triple Front/Dual Rear),Fabtech Dual Rear Shock Kit/Traction Bars,ARP Head Studs, Sinister Headers/Y Pipe/Regulated Return,175 cc Injectors,Edge Juice Platinum with Attitude,SCT Tunes,Snow Performance Stage 3 Water Methanol Injection,FASS 150/180,Banks Techni-cooler System,Fluidampr,4in Straight Pipes.