What gear oil is good?

[ShadowsPapa]

I’ll stay out of the oil type debate, but it’s a really easy job. Drain out the old through the drain plug hole, put that plug back in, then put the new oil in the fill hole. Tighten the fill plug, then you’re done.

LOL - yeah, what religion is best, what spark plug is best, what color is best, what's the best state to live in (personally, I prefer the state of confusion but that's just me)
Anyway, love your tech how-to here. Well said.

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[oldhp3]

What did the installer say to run???

 

[SelfmodJT]

This is what I picked to use in mine. I'm going to replace the differential covers when it gets warmer.

Castrol 06674-6PK Syntrax Limited Slip 75W-90 Gear Oil - 1 Quart, (Pack of 6) https://smile.amazon.com/dp/B00B9XDOLO/ref=cm_sw_r_cp_apa_i_WmdaEb89QN3S3

Will this be the gear oil I use if I have the willys?

 

[Mr._Bill]

Will this be the gear oil I use if I have the willys?

You need it, or something similar, or the slip additive, if you have the Limited Slip rear end. Otherwise, any 75W-85 or 75W-90 gear oil should be sufficient. It is recommended to use 75W-140 in the rear differential when doing a lot of towing.

 

[SelfmodJT]

You need it, or something similar, or the slip additive, if you have the Limited Slip rear end. Otherwise, any 75W-85 or 75W-90 gear oil should be sufficient. It is recommended to use 75W-140 in the rear differential when doing a lot of towing.

Just to clarify, so the willys has the limited slip and i dont tow so i can use the exact oil on the link, correct? Do i use it for the front too? Sorry, im a noob with this gear oil. Thanks.

 

[SelfmodJT]

Dont want to pay $54 a quart dealer prices, lol. Dealer didnt metion if the front used the same oil, he just said i would need 4 quarts because it would be over 3 quarts for front and back.

 

[Mr._Bill]

Just to clarify, so the willys has the limited slip and i dont tow so i can use the exact oil on the link, correct? Do i use it for the front too? Sorry, im a noob with this gear oil. Thanks.

Yes, with the limited slip and no towing, that will work. You can also use it in the front. It contains a friction modifier that is needed in the LSD rear. It's not necessary for the front, but no need to buy and keep track of two different gear oils.

 

[SelfmodJT]

Yes, with the limited slip and no towing, that will work. You can also use it in the front. It contains a friction modifier that is needed in the LSD rear. It's not necessary for the front, but no need to buy and keep track of two different gear oils.

Thank you for the confirmation! Just ordered.

 

[seven30]

LE Monolec 75W-140 gear oil (9923) is interesting but its not going to be at your local autoparts store. Sadly there are big differences in oils even the same spec. I know where to go to get engine oil tests but not gear lubes.

 

[Rusty PW]

LE Monolec 75W-140 gear oil (9923) is interesting but its not going to be at your local autoparts store. Sadly there are big differences in oils even the same spec. I know where to go to get engine oil tests but not gear lubes.

At the power plant. We used Polaris Labs.

https://polarislabs.com/

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