Solid rear diff cover

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M38 Bob

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CJ, anyone making that accusation on a face to face level, I'd likely short pour a boot up his ****.

Bob
 

CactusJacked

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Oh, you thought I was reefering to you specifically! Thanks for the offer, but I don't take boots up the ****, even if I could park an aircraft carrier up there. lol
 

Jbergun

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What gear oil should i ise for year round protection for outdoor temps ranging from -10 to 100 degrees. Chicago weather is pretty unpredictible could get colder could get hotter.
 

TwoBobsKJ

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What gear oil should i ise for year round protection for outdoor temps ranging from -10 to 100 degrees. Chicago weather is pretty unpredictible could get colder could get hotter.

I use 85W/140 dino oil in mine cuz I tow and like to take it off road. Last winter on some of the coldest mornings it took a while for the dino to loosen up - was kinda like molasses. It was -28F one morning, -23F on another when I was on business and stayed at a hotel - parked the KJ outside. I actually laughed out loud when I started to back out of my parking space - the diffs felt like trying to stir a jar of peanut butter.

Quarter mile down the road and it was fine :party52:

Bob
 

Jim McClain

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I use 85W/140 dino oil in mine...
I googled that because of so many references to it here on the forum, but I couldn't find much about it except other mentions of "dino oil" on other forums. Is that a brand? Can you clue me in? If it's not a brand, but a type, why that as opposed to synthetic? And do you have an actual brand recommendation?

Sorry, this is one of those times I haven't had any luck searching so as not to make myself look too dumb. FAIL! ;)
 

Jbergun

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I googled that because of so many references to it here on the forum, but I couldn't find much about it except other mentions of "dino oil" on other forums. Is that a brand? Can you clue me in? If it's not a brand, but a type, why that as opposed to synthetic? And do you have an actual brand recommendation?

Sorry, this is one of those times I haven't had any luck searching so as not to make myself look too dumb. FAIL! ;)

You got it right dino oil is oil made from dinosaurs. As opposed to a synthetic. It is not a brand or anything. They made a point of saying dino because you shouldnt use synthetic in your differential. I was also confused on this until i seen it used in context in a discussion about synthetics.
 

HoosierJeeper

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For a brand, pretty much anything works. Some use the store brands, I used Valvoline or Castrol, I don't even remember. Dino is good and whatever weight Bob said to use, that's what I have in mine
 

CactusJacked

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The reference dates further back than Sinclair. Goes back to the stone age. lol...

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CactusJacked

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I never seen that stuff before must be before my time

Yeah I guess it was. Sinclair was an oil company that was bought out by ARCO in 1969 (now sold to BP). I remember when the gas stations finally changed over, as we had a kid in school with the last name of Sinclair, we started calling him Arco instead. lol
The one I posted is Fred Flintstones pet dinosaur "Dino"
 

Jbergun

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Im young but i still know fred flintstone ha ha. Going to be getting my diff cover this weekend or monday do the swap next weekend.
 

twowings

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The oil companies aren't going to be satisfied until all the dinosaurs are extinct!
 

LibertyTC

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I run the "dino" 85w-140 as well in Lucas Flavor!
53526[/ATTACH]"]
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At 20 k miles it was still relatively clean and it does well for rear gears.
I have a trac-lok which does require adding a 4 oz bottle of Mopar limited slip additive.
Has anyone ever tried mixing a dino & GL5 synthetic gear oil for the -20+ colder temps?
 

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Jbergun

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Yea cactus thats the one purely to get better ground clearence.:happy175:
 
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