12' JK Sahara Gear Oil Change (Differential Fluid) - Jeep Wrangler Forum
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Old 03-19-2016, 04:42 PM
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12' JK Sahara Gear Oil Change (Differential Fluid)

I am about to replace my differential oils. I got Lucas 80W90 for front (since i couldn't see any other brand without limited slip) and Valvoline 80W90 Limited Slip for rear.

I am assuming i have Dana 30/44.

So what do you guys think of the choices that i made?

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Old 03-19-2016, 11:43 PM
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Anyone?

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Old 03-20-2016, 12:31 AM   #3
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In for answers, yes you should have a Dana 30 front and 44 rear
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Old 03-20-2016, 12:43 AM   #4
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Old 03-20-2016, 12:58 AM   #5
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Quote:
Originally Posted by SaNGRia View Post
I am about to replace my differential oils. I got Lucas 80W90 for front (since i couldn't see any other brand without limited slip) and Valvoline 80W90 Limited Slip for rear.
Having the LSD additive in the fluid will not harm a differential that isn't an LSD. I use Royal Purple 75W-90 and 75W-140 in my Sahara.
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Old 03-20-2016, 07:06 AM
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Thank you. I was looking for this answer. Since the user manual doesnt say that you can use lsd product on the front i wasn't able to verify which one to use. I got lots of good reviews on lucas 80w90 on amazon even it didnt look too good of a choice since i never heard before. Thank you for the answers.

And i read all of the forums about the maintenance of differential. And usually people chose synthetic one and they do not mention anything about additive on the front axel or a product that says LSD. They only give the numbers!

When you go to shopping, products can mislead you since the user manual does not give you other products list other then MoPar. And the biggest chain companies does not carry mopar (and i am not going dealer)
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Old 03-20-2016, 07:57 AM   #7
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FWIW I just changed mine front and rear with mobil 1 80.90w no problem.. It;s mobil 1 and that's what I run in the engine.

Spend $10 or so and get a quart pump with the flexible hose to fill. Makes things a whole lot easier... Maybe a 30 min job
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Old 03-20-2016, 08:28 AM   #8
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If your going to remove the whole cover .get yourself some lubelocker reusable gaskets.you save a lot of time not having to wait for the rtv to set up
http://www.amazon.com/Lube-Locker-Da.../dp/B008RAAOJW

http://www.amazon.com/Lube-Locker-Da.../dp/B008RAD3NG
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Old 03-20-2016, 11:50 AM   #9
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I agree, you're fine. X2 with Jeff. The LSD additive doesn't help or hurt an open dif., meaning you can use it. I also recommend Lubelocker re-usable gaskets if you decide to drop the cover.
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Old 03-20-2016, 01:53 PM
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If your going to remove the whole cover .get yourself some lubelocker reusable gaskets.you save a lot of time not having to wait for the rtv to set up
http://www.amazon.com/Lube-Locker-Da.../dp/B008RAAOJW

Amazon.com: Lube Locker Dana 44 Differential Gasket: Automotive
Thank you for the info. I am the sec owner of this jeep. I was 27k when I bought 2 years ago. Now it is 44k and the first time I replace the diff. oil.

I did not open the cover yet. Maybe I should to see what is going on since when I unscrew the bottom screw on dana 44 and I got 1 little piece og metal on my finger right after draining the fluid!

But so far it drives very smooth with this gear oils. I didn't want to waste the Lucas one. I used the Lucas on front and I re-filled the Lucas with Valvoline and used for the Dana 44 since I didn't get the pump and hose for a gallon bottle!

And the Front did get only 1 bottle and start leaking from the loading hole!

And Rear took about 2 bottle!

So my next maintenance will be about 6 month for this diffs but I will definitely get the Lube Locker since you can re use and no other stuff needed. Looks like the cleanest setup in the market!
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Old 03-20-2016, 04:47 PM   #11
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Im very happy with the gaskets..i used valvoline in my diffs.did them at 50k.since doing them it's probably just in my mind but it seems smoother and a dont hear the wine as much
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Old 03-20-2016, 04:49 PM   #12
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It's probably fine. Diff gear oil is commonly neglected in most vehicle maintenance, and I think the interval is really high for regular daily drivers.

Jeepers focus on it more due to possible water crossings that submerge the diff and the fact that if you have lockers or paid to regear, you protect your investment.

If you get to the point that you decide to pull the cover, you can use brake cleaner to clear it out and inspect it. Get lube lockers and after market covers for a nice upgrade. Solid brand covers go on sale and can be had for around $60.00.

If you do water crossings, you'll want to check and change your fluid regularly otherwise it's probably a 60k type interval.

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