Who makes a GL4 gear oil?

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Valvoline Conv. 80w90 is dual rated, and Napa has a GL3/4/5 triple rated gear lube.

Otherwise, Redline makes some nice gl4 products along the lines of mt85/90.
 
I cant use a GL5 lubricant so it has be GL4 but not 5. I see that Redline is an option. Any others?
 
by transfer case is this a 4wd vehicle or what?

redline makes about 5 different GL-4 lubes also.. mainly aimed at MT's
 
Originally Posted By: double vanos

Motorcraft XT-M5-QS. Made Germany . Used it in my Mazdaspeed 3. Good stuff. It pricey....


Agree 100%
 
Castrol Syntorq LT is a 75W-85 GL4 synthetic gear oil as well. Designed specifically for the New Venture NV4500 5 speed light truck transmission, it's available at most GM and Chrysler dealerships, albiet expensive.

On the mail order side, I've purchased this from Quad4X4.com in the past for around $17 a quart plus shipping.
 
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