Had a problem with the fills on my front diff, transfer case and rear (Quadrasteer) diff that I posted previously. They didn't take the stated amount of oils and I attributed it to the leveling of the truck. Now I'm getting a rough vibration and I want to check and fill the diffs the right way. What's the best way to level the truck using floor jacks, is there a place on the vehicle that I can put a level so that the side to side and front to rear is at least close to level?
Leveling Truck For Diffs Fill Question ??
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Frame rails must be level enough since that's what a lift would level the truck with. In general though, I don't think difs are all that sensitive to the level of oil. +-10 percent is probably fine.
Park it on a level surface (garage, maybe) and find a spot in the vehicle where a level shows it is, well, level. For my MX5, this is the cup holder in the console. Raise one end of the vehicle with the level in place and raise the other end until level. Good luck.
I thought of the frame rails but you would have to check them when on a lift or other known level surface. I was thinking of a lift that the tires sit on, guess both need to be pretty level. I thought there might be a place on each vehicle where the level can be measured. Cup holder is only good if you checked previously that when on a level surface that it measured level in that area. I'll have to check the level of my garage floor (not that I can get a truck in there).
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The best way to check fluid level in a differential is with weight on wheels, on a level surface. Since this is a truck, this should be very easy to do.
No level surface near me, I'll have to find one. I disagree with there being a minor difference, it was not just an ounce or two that didn't go in. If a large rear diff has long axle tubes than a small shift to one side can flow a lot of oil in that direction. The transfer case is front to rear sensitive, if you were to have the case in your hand and shifted it from front to rear you could make the oil shift away from the hole or spill out of it. These units were drained from a drain plug that is at the bottom, the fill should be at least close to what is called for. I think the noise is coming from the front diff, I'll check it today...
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Sorry for the delay. I know, it's not an easy one to troubleshoot. I need to check the oil levels first and then my L/S cv joint. It feels like a drive train gear noise but it coul be a lot of things. Just seems a little suspect that the oils were just changed...
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