8 89llx 5 Year Member Aug 31, 2009 302 5 29 Jun 4, 2016 #1 Jun 4, 2016 #1 Will full synthetic rear end oil make the posi clutch slip?
FourEyed Active Member Jan 9, 2011 93 44 39 Jun 5, 2016 #2 Jun 5, 2016 #2 I'm running Royal Purple Max-Gear synthetic in my 8.8 with 3.73s without issues.
OneWheelPeel Active Member Dec 23, 2015 250 42 48 North Carolina Jun 5, 2016 #3 Jun 5, 2016 #3 Same here and no problems.
Mustang5L5 That is…until I whipped out my Bissell Mod Dude Feb 18, 2001 43,353 18,092 224 Massachusetts Jun 7, 2016 #4 Jun 7, 2016 #4 No You need to have your rear end rebuilt. On and on Ford's, it's "Traction-Lok" Posi is a GM term. Both are limited slip differentials. Reactions: moe9853
No You need to have your rear end rebuilt. On and on Ford's, it's "Traction-Lok" Posi is a GM term. Both are limited slip differentials.