View Single Post
Old 03-04-2019, 09:58 AM   #166
Nick M3
Relic
 
Nick M3's Avatar
 
Join Date: Oct 2003
Location: Bethesda, MD
Posts: 12,458
Quote:
Originally Posted by rumatt View Post
Don't the rear wheels need to spin during the test?

Nick, what did you use? Some custom made jack-stand-like-things-with-wheels?
Lol. No. You guys are overthinking this. You just jack up the rear with a floor jack. If the car moves forward at all, the viscous coupler is good. And yes, the rear wheels will rotate.

When the VC is burned out, the rear wheels spin and the front does nothing. You still have AWD, but AWD with an open center diff is not nearly as effective.
__________________
2011 M3
2006 Sierra 2500HD 4WD LBZ/Allison
2004 X5 3.0i 6MT
1995 M3 S50B32
1990 325is
1989 M3 S54B32

Hers:
1989 325iX
1996 911 Turbo


Nick M3 is offline   Reply With Quote