Originally Posted by mi_bimmer
LittleBlue, did your diff go out after you changed the oil?
It got worse after the fluid change, noise got real loud in and out of the car after the change. It was bearable before.
BTW... RedLine Oil analysis revealed that 90 percent of the sample was RedLine mixed with what was leftover original oil 10%.
Also, the viscosity was still holding well, but the color change to real dark oil is contributed by the 'cleanup' of the case that the Redline oil did.