I didn't buy any oil. I really wanna run my truck. I have 7k cst oil and some grease. What would be better to use? I don't want to wait for shipping times.
Senton What should I use for diff lubricant
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quiznatodd bidness
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Are you talking inside the diff or outside (on the crown-input gearing)? This is a 3s/4s differential set?
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Inside the diff case. My crown gear got eaten so I have to change all the plastics and there won't be any oil in the new case. What would be better?
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Use that 7K. It’s not much different than stock.
Had to make sure I was in the right forum first. Ok....grease is thicker then 7k I would run that.
quiznatodd bidness
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Yeah, plastic on 3s would be fine with 7k. I think I put 10k in mine last time, but other guys on YouTube I’ve seen go up to like 30k (I think for higher torque usage).
I’ve not had any internal issues with a diff, but I have stripped the inputs 3x and the crown once in the rear. I have the metal replacements almost within my grasp…
I’ve not had any internal issues with a diff, but I have stripped the inputs 3x and the crown once in the rear. I have the metal replacements almost within my grasp…
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- Typhon TLR
That’s not a good idea
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Grease is comparable to 1K cst. The 7k oil is better to start with.
Hector_Fisher
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The difference between grease and oils is that grease doesn't "flow". In differentials, you need fluid motion. Grease will likely pack to the outsides of the diff case and then cease to perform it's function anymore. I'd run the 7k oil. It won't hurt the diff. if you find you want thicker stuff later, then you can buy a different thickness.
