How to grease the front end of a GM/Chevy HD truck 2011-2021

Wayne

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I greased the truck after our last two trips and about 4,000 miles. My observation is that the boots were all pretty empty and each zerk took about three pumps to see the boots expand a bit. I'm thinking greasing every 5,000 miles sure won't hurt anything.

It took me all of about 5 minutes to grease the truck and no swearing :)
 

spasm3

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I agree. My friend that owns a auto shop told me that if the front ends are regularly greased, they will last almost indefinitely. He also said that most people don't bother to grease the front ends and they wear out fairly quickly, much faster than sealed joint vehicles. Grease zerks are meant to be greased!
Wayne, now that you have the front end taken care of, what will be your oci for the rear end gear oil? When i had a rear end rebuilt, they told me not to tow for 500 miles , and change the diff oil out at 1500.
 

Wayne

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Wayne, now that you have the front end taken care of, what will be your oci for the rear end gear oil? When i had a rear end rebuilt, they told me not to tow for 500 miles , and change the diff oil out at 1500.
I just dumped the factory fill at 8,500 miles and ran HPL's Gear Life 75w-90 for 500 miles, then drained and refilled with the same HPL fluid. Going to sample after 500 miles to establish a baseline. I will then sample at 25,000 miles to see how it's doing. HPL's Gear Life is very robust and should last 100,000 miles, we'll see.
 

spasm3

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I just dumped the factory fill at 8,500 miles and ran HPL's Gear Life 75w-90 for 500 miles, then drained and refilled with the same HPL fluid. Going to sample after 500 miles to establish a baseline. I will then sample at 25,000 miles to see how it's doing. HPL's Gear Life is very robust and should last 100,000 miles, we'll see.
That's pretty thorough. I'll look at their gear oil too. I will probably run their oil as well, their plus oil has 800+ of moly. From what I read , high moly keeps hemi's quiet.

Probably switch to that oil next spring.
 

Wayne

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From what I read , high moly keeps hemi's quiet.
Dave at HPL has explained to me that there are dozens of moly compounds that can be used to formulate lubricants. They will all show on a UOA, but some don't have much affect on wear and are cheap. Others are very expensive and have drastic affects on wear. HPL does use an expensive formula of moly compounds that are highly affective. You should come up here and tour the plant...
 

spasm3

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Dave at HPL has explained to me that there are dozens of moly compounds that can be used to formulate lubricants. They will all show on a UOA, but some don't have much affect on wear and are cheap. Others are very expensive and have drastic affects on wear. HPL does use an expensive formula of moly compounds that are highly affective. You should come up here and tour the plant...
I have chatted with him in private message a few times. Thats how i found out that the premium plus line has like 850ppm, and that oil is PAO heavy , and with esters. I have to explain to my wife why i am going to buy 2 cases of oil @ $95 or so each!
 

Wayne

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I have to explain to my wife why i am going to buy 2 cases of oil @ $95 or so each!
What could possibly go wrong?

I would suggest a UOA after 12 months to check the TBN. I think you'll find this oil is amazingly robust and with the miles you drive, you can probably run it 24 months with no problems. If that's the case, then it makes your $95/case oil very reasonable for great protection.
 

gobi

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What is the fuel dilution like your trucks?
Mine is the "bad" year and it kills the oil during regen,
 

Wayne

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What is the fuel dilution like your trucks?
Not a problem per the UOA.

 
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