I am going to change the rear diff oil in my 2006 Toyota Tacoma, 2WD. It is an open diff, I do not really do any towing or hauling etc. So, I was just going to put regular Valvoline dino 80W90 in. But Napa has the Valvoline full syn 75W90 on a good sale right now, making it close to the same price.
A couple years ago, I changed out the rear diff oil in my 2004 Ford Explorer. As per a TSB, I installed Motorcraft full syn 75W140. Some time passed and then my pinion seal started leaking. Bad enough that it was slinging the oil around.
I never thought about it until I started thinking about changing the oil in my Tacoma.
Do you suppose the full syn fluid deteriorated the seal in my Explorer?
Has anyone run into this before?
A couple years ago, I changed out the rear diff oil in my 2004 Ford Explorer. As per a TSB, I installed Motorcraft full syn 75W140. Some time passed and then my pinion seal started leaking. Bad enough that it was slinging the oil around.
I never thought about it until I started thinking about changing the oil in my Tacoma.
Do you suppose the full syn fluid deteriorated the seal in my Explorer?
Has anyone run into this before?