Quote:
Originally Posted by Joe777
I've been pondering this exact topic recently. I was changing the rear axle gear lube in my 1.5 ton truck and noticed a venting of pressure when I removed the fill plug. The axle was at room temp (not warm from driving) when I did this. Does anyone make a vented fill plug for these bigger truck axles?
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If the plug has NPT threads, it would be easy to get a hose nipple to replace it, and run a hose up to the frame.