Over the weekend I changed out the driveline fluids on our Q5 (trans, front and rear diff, transfer case). The fluid capacity of all three except the trans is 1L, so I had purchased 1L of each.
The transfer case and rear diff did not overflow out of the fill hole despite each taking almost the whole 1L bottles. Around 20-30mL was left in the bottles as the pump couldn't get all of it from the bottom. I am wondering if the pump retained some fluid as well since there was no overflow (though it just pumped out air at the end).
How sensitive are center and rear diffs to having completely full fluid level? I will top them both off so I can sleep at night (including the $100/1L transfer case fluid), but is it ok to drive the car minimally in the mean time?
The transfer case and rear diff did not overflow out of the fill hole despite each taking almost the whole 1L bottles. Around 20-30mL was left in the bottles as the pump couldn't get all of it from the bottom. I am wondering if the pump retained some fluid as well since there was no overflow (though it just pumped out air at the end).
How sensitive are center and rear diffs to having completely full fluid level? I will top them both off so I can sleep at night (including the $100/1L transfer case fluid), but is it ok to drive the car minimally in the mean time?