viscous coupling 97 v8 test

[bigcrunch]

On a 97 v8 AWD BW 4404 what is the corect way to test if viscous coupling is good?

I have read what Gavin posted thats for a VW so looking for Ford info.

 

[Joe Dirt]

I always put the truck on 4 jackstands and run the truck in drive to see if all 4 roll, and also listening for the low speed crunching noise. That's how I diagnosed Shamrock's bad VC...

 

[Big6ft6]

warning***post resurrection

Do viscous couplings usually fail open or closed? If heat is the usually suspect, then maybe the plates in the VC fuse together...failing closed?

 

[Big6ft6]

Never mind...found good answers here
http://www.explorerforum.com/forums/showthread.php?t=304172&highlight=test+viscous+coupling

 

[bigcrunch]

Get rid of the BW4404 !!! best mod I have made to my V8 allwheeldrive is get rid of the allwheeldrive.

The gas savings have offset the cost for the 4406 transfer case(manual) and driveshafts, used parts.

Plus true locked 4 hi and 4 lo is unbeatable....................