Doing maintenance on my 1997 GMC Sierra and have a few questions. My pinion seal started leaking and I replaced it. I replaced it 7 years ago but only 10,000 miles were driven since then. I have always filled my front and rear differentials and transfer case the same way. I fill them with a hand pump till the fluid comes up to the bottom of the fill hole and then pump a few more times till it is starting to flow out the fill hole. Then I plug it up. I do this to make checking easy, all I have to do open the fill hole a crack and if oil starts to seep out or drip, I know it is still 100% full.
I'm wondering if this slight over filling is causing my seal to leak and fail. I don't know if it failed because of overfilling or from age and sitting a lot?
Is this practice safe or am I causing any issues?
Many thanks!
I'm wondering if this slight over filling is causing my seal to leak and fail. I don't know if it failed because of overfilling or from age and sitting a lot?
Is this practice safe or am I causing any issues?
Many thanks!