Differential oil change

[GW’s JL]

2021 Wrangler Sport S bought this spring with 30k miles. Differential services completed yesterday at 35k. Some glitter but fluid looked clean. Probably factory fill.

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[Rhinebeck01]

Price Alert.... For Limited Time - Amazon is selling for $56.47 for a case of 4

WOW $14.12 per bag !

Valvoline Flexfill SAE 75W-140 Full Synthetic Gear Oil 1 QT, Case of 4
https://www.amazon.com/Valvoline-Fl...B5LTJM&ref_=pd_bap_d_grid_rp_0_25_nped_t&th=1

 

[wibornz]

Price Alert.... For Limited Time - Amazon is selling for $56.47 for a case of 4

WOW $14.12 per bag !

Valvoline Flexfill SAE 75W-140 Full Synthetic Gear Oil 1 QT, Case of 4
https://www.amazon.com/Valvoline-Fl...B5LTJM&ref_=pd_bap_d_grid_rp_0_25_nped_t&th=1

Valvoline diff fluid does not hold up well to the additional heat created by big tires and towing.

 

[Terrymo]

Valvoline diff fluid dones not hold up well to the additional heat created by big tires and towing.

I’m interested in what leads you to this conclusion?

 

[DanW]

Valvoline diff fluid does not hold up well to the additional heat created by big tires and towing.

It´s done fine for me on 35´s. Are you running larger? I change it every 35k.

I did find Mobil 1 75w40 for about $14 a quart at Rural King. It was less expensive than the Valvoline.

What gear oil are you running, Mobil 1?

 

[wibornz]

All of our Jeep shops that do gears recommend Lucus non synthetic gear oil. Military testing of diff fluids found that Lucas runs the coolest.

 

[Terrymo]

All of our Jeep shops that do gears recommend Lucus non synthetic gear oil. Military testing of diff fluids found that Lucas runs the coolest.

I’ll rephrase my question. I value your opinion and know you have many more hard miles towing and off-road than 99% of the people here. How does someone tell their choice of gear oil is not holding up short of mechanical failures?

 

[zouch]

Eaton also does not recommend Synthetics for use in their Truetrac, so that's what i use as well.

All of our Jeep shops that do gears recommend Lucus non synthetic gear oil. Military testing of diff fluids found that Lucas runs the coolest.

 

[wibornz]

I’ll rephrase my question. I value your opinion and know you have many more hard miles towing and off-road than 99% of the people here. How does someone tell their choice of gear oil is not holding up short of mechanical failures?

Here is a thread about my Dana 44 experience.

https://www.jlwranglerforums.com/fo...i-think-it-has-been-unreliable-for-me.118652/

 

[wibornz]

Banks makes a diff cover now that is a ram air cooled. Unfortunately not for the Dana 44. They claim it is 5x better at cooling the rear differential.


https://bankspower.com/collections/differential-covers

 

[roaniecowpony]

Banks makes a diff cover now that is a ram air cooled. Unfortunately not for the Dana 44. They claim it is 5x better at cooling the rear differential.


https://bankspower.com/collections/differential-covers

That looks like it would be a problem for rock crawlers. The lower scoops would likely hang up on rocks.

 

[wibornz]

That looks like it would be a problem for rock crawlers. The lower scoops would likely hang up on rocks.

I don't think it would be necessary for rock crawling. Rock crawling is slow speed so there is not a big build of heat in the differentials. Running big tires and towing for 16 hour days like to do is what builds the heat.

I don't think it would be a big deal to make the diff cover to pull air from the side either. I believe that make diff coolers race applications. That could also solve the problem of excess heat.

 

[grimmjeeper]

That looks like it would be a problem for rock crawlers. The lower scoops would likely hang up on rocks.

If you watch their sales video, you'll see how the scoops break away if you hit them...

 

[Terrymo]

If you watch their sales video, you'll see how the scoops break away if you hit them...

Banks patented self clearancing technology.

 

[Rhinebeck01]

@CarbonSteel
@others

New kid in town...

Valvoline FlexFill Extended Protection Full Synthetic 75W-140 Gear Oil 1 Quart Pouch

https://www.amazon.com/Valvoline-Fl...+Gear+Oil+1+Quart+Pouch&qid=1761872699&sr=8-1

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