Differential oil change

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R.L.K.

R.L.K.

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My service advisor said my dif will be do when I hit 60K miles. I'm currently at 31k. I rarely tow a small 4x8 trailer and I rarely throw it in 4x4. I'm sure it's buried in here somewhere, but do I only need to worry about the rear dif since I run a 1500?
To my knowledge the front Differential is turning all the time even in 2wd . Shifting into 4wd is an electrical action engaging a right & left side actuator to engage the CV shaft . So I'd recommend changing both at the same time [emoji106][emoji106]
You can change both in less than 30 mins yourself and the fluid is pretty cheep even for top of the line fluid .

If I'm wrong ...some one please chime in [emoji16]
Hope this helps !

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I have been a synthetic oil fan for years ! Now getting close to 50 k LIGHT DUTY use I am thinking of changing the oil to 100% synthetic ! For those who change to synthetic did you notice any difference ? I have no issue currently ! I know when I switched to 100% synthetic oil to my car,truck or motorcycle I did not notice a difference other then me feeling better lol
 
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I have been a synthetic oil fan for years ! Now getting close to 50 k LIGHT DUTY use I am thinking of changing the oil to 100% synthetic ! For those who change to synthetic did you notice any difference ? I have no issue currently ! I know when I switched to 100% synthetic oil to my car,truck or motorcycle I did not notice a difference other then me feeling better lol
As far as Differential gear oil goes ...I noticed no difference .

Engine oil I absolutely noticed a difference as my engine is extremely smooth and quiet as a church mouse now .

Xsmn oil I noticed a big difference in smoother shifting .

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As far as Differential gear oil goes ...I noticed no difference .

Engine oil I absolutely noticed a difference as my engine is extremely smooth and quiet as a church mouse now .

Xsmn oil I noticed a big difference in smoother shifting .

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Thanks for your input ! I never really noticed a big difference with synthetic but use it because I believe it offers better protection ! Never had a noisy motor to hear the difference, so good to hear others with good results, I did not think about synthetic transmission oil but now I am lol To me cheap insurance :)
 
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Thanks for your input ! I never really noticed a big difference with synthetic but use it because I believe it offers better protection ! Never had a noisy motor to hear the difference, so good to hear others with good results, I did not think about synthetic transmission oil but now I am lol To me cheap insurance :)
I'm not certain if the Mopar OEM xsmn is 100% synthetic or not but when I changed the filters and fluid at only 47k it definitely shifter better .

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I'm not certain if the Mopar OEM xsmn is 100% synthetic or not but when I changed the filters and fluid at only 47k it definitely shifter better .

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I noticed after my first Synthetic oil change the oil was cleaner, each change was better so I believe in the saying that it has Better Thermal Breakdown,so less carbon, And heard the synthetic gear oil has less foaming, so from all you have said and what I have heard Synthetic it is :) I am curious now if the OEM is full synthetic lol
 

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What does the factory put in the diff’s?? Conventional or a synthetic type


I Love My 2018 RAM 2500HD 4x4 Off Road. 6.4L. USMC (ret)
 

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What does the factory put in the diff’s?? Conventional or a synthetic type


I Love My 2018 RAM 2500HD 4x4 Off Road. 6.4L. USMC (ret)
I assume it's the Mopar fluid , I know when I drained it out at about 30k it looked new still .
Ive seen test results of Mopar diff fluid , not the worst , kinda middle of the pack .
I poured in Redline which was head & shoulders above the other diff fluids on the test I seen [emoji106]

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I myself will be sucking out the FF @ the 10K mile mark & refilling with a combo mix of RL 75W-110/140.
A aftermarket aluminum cover will be added at some point in time. (Very Near Future)

This AAM 11.5 (anti-slip) with the Helical Gear is top notch.
(No Anti-Slip Additive needed with the Helical design)
I have been instructed (Fresh/Clean Gear oil) changed frequently is very vital to this Helical design——-> As well as told to use 110 or 140.
I want to give it the up most attention.

Note: This rearend is not used in the 1500.
I don’t want any confusion.

I even went so far & asked my close friend & Service Mgr within the dealership were I bought my HD2500 about my RL 75W-110/140 combo & he never hesitated to give me his blessing with a large Thumbs Up!

I would not hesitate to run Amsoil SVG but after Shipping/Tax I can flat out get RL much cheaper.
 
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MidwestJ

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Ha yeah it's absolutely ridiculous that it costs that much. Best price I could find online was $22/quart.

From what I can tell it's just ATF+4 with an added friction modifier for the clutch that gives the 4Auto setting.

My owners manual (2009 big horn hemi5.7) advises it’s just ATF+4 fluid for the transfer case.

SoooOOOooo...what’s the best synthetic ATF+4 Fluid?
 
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My owners manual (2009 big horn hemi5.7) advises it’s just ATF+4 fluid for the transfer case.

SoooOOOooo...what’s the best synthetic ATF+4 Fluid?
I'm using Redline C+ [emoji16][emoji16]

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MidwestJ

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I'm using Redline C+ [emoji16][emoji16]

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Thank you sir!

I’m looking to go with the Royal Purple Max ATF
Between Amsoil or Royal Purple, I'd go with Amsoil personally.

But Redline C+ is the best ATF+4 fluid out there IMO. Unlike Amsoil and RP which are "one size fits most" ATFs, Redline made C+ is made specifically for Chrysler transmissions/transfer cases.

Did NOT know that. Good info. Will check that out.
 

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Between Amsoil or Royal Purple, I'd go with Amsoil personally.

But Redline C+ is the best ATF+4 fluids out there IMO. Unlike Amsoil and RP which are "one size fits most" ATFs, Redline made C+ specifically for Chrysler transmissions/transfer cases.

This right here. Got a couple family members that work for a RP distributor and while I could get it cheap I still would rather use Redline or other fluids. I've never been too impressed with RP products, outside of their filters (Champ Labs per a Rep). I switched my 44-44 (4 Auto) over to Redline C+ a while back and it works a lot better now.
 

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This right here. Got a couple family members that work for a RP distributor and while I could get it cheap I still would rather use Redline or other fluids. I've never been too impressed with RP products, outside of their filters (Champ Labs per a Rep). I switched my 44-44 (4 Auto) over to Redline C+ a while back and it works a lot better now.
Wait you're running C+ in your 44-44?? How does it run? Clutch engagement ok?
 

joshuaeb09

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Wait you're running C+ in your 44-44?? How does it run? Clutch engagement ok?

It's noticeably better. Using 4Auto when the streets here get really slick in the rain or the occasional once a year ice we get stock was what I would consider pretty meh. With the C+ it engages smoother and it seems more balanced in the power distribution when needed. It also seems to work just as well as before in 4 Lock or 4 Low.
 
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