promodmerc
Wheeler
Reged: 11/10/10
Posts: 143
Loc: Raytown MO
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The owners manual specifies straight 90w for the transfer case. All I can find is 75-90w or 80-90w. Can I use a multiple viscosity gear oil in the transfer case?
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Peabody
Wheeler
Reged: 04/18/11
Posts: 213
Loc: Sac-area, California - USA
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Yes, no problem. The blended oils are rated that way to indicate they will function in varying temperature conditions (i.e. summer/winter), with the high value associated with high-temp/reduced viscosity and the low value reflecting low-temp/high viscosity (hot and thin vs. cold and sludgy). Thus, the more extreme-range oils would be good for colder climates, such as the northern region of the U.S. In your neck-o-the-woods, 80/90 is plenty-fine... 
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1997 Sportage 4x4, auto-trans, Warn manual hubs, 3.5" UPYOURKIA lift w/TJ 105AA rear springs, 2-5/8" custom body lift, 31x10.50 Adventuro MTs... and SmittyBilt SRC front and XRC rear bumpers with swing-out tire mount - and an OBX LSD front diff!!!
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promodmerc
Wheeler
Reged: 11/10/10
Posts: 143
Loc: Raytown MO
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Quote:
Yes, no problem. The blended oils are rated that way to indicate they will function in varying temperature conditions (i.e. summer/winter), with the high value associated with high-temp/reduced viscosity and the low value reflecting low-temp/high viscosity (hot and thin vs. cold and sludgy). Thus, the more extreme-range oils would be good for colder climates, such as the northern region of the U.S. In your neck-o-the-woods, 80/90 is plenty-fine...
Thak you Mr. Peabody 
I figured 75-90 or 80-90 was fine. We do hit negitive temps in Kansas City.
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promodmerc
Wheeler
Reged: 11/10/10
Posts: 143
Loc: Raytown MO
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I forgot to ask this.
What Allen wrench/socket size is the fill & drain plug on the t-case?
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KF6ZPL
Recreation Advocate
Reged: 02/15/00
Posts: 3948
Loc: Lakeside, CA
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Sorry, can't resist...
Quote:
I forgot to ask this.
What Allen wrench/socket size is the fill & drain plug on the t-case?
The size that fits... 
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John Stewart
Editor - 4x4Wire.com
4x4Voice
Board Member BlueRibbon Coalition
CA4WDC Resources Consultant
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