Best gear oil

[Dark Knight 500]

Did a quick search and couldn’t find anything on this, so I figured I’d start one. I’m just curious what you guys and gals think the best gear oil is for our trucks. I got a 2017 1500 with 3.92 gears and a lsd rear end


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[Hemi395]

Personally I prefer Redline gear oil. Amsoil Severe Gear is another great choice.

 

[S0CAL]

Redline here

 

[22hemi13]

I just did both mine and used Lucas. I’m also going to do it soon like in 10k miles I got truck used. Maybe I go with something different but as of now I see no changes it didn’t have problems when I changed just needed changed.

 

[gixxer]

Put in redline or amsoil severe gear. These two seem to come out on top and both have LSD additive.

https://www.lastgreatroadtrip.com/wp-content/uploads/2010/11/gear-oil-comparison.pdf


Based on this Lucas is way too thick initially and drops hard.

 

[meedom]

If you want something local off-the-shelf and proven over many years, get the Mobil 1 synthetic with already added friction modifier at your local auto parts store....

 

[69GWC]

Personally I prefer Redline gear oil. Amsoil Severe Gear is another great choice.

This.

I have Redline in my diffs.

 

[huntergreen]

X3 on redline or amsoil.

 

[Hemi395]

IMO gear oil in this order:

1. Redline
2. Amsoil SG
3. Mobil 1
4. Pennzoil Platinum (if you can find it)

I would stay away from Lucas based on several independent tests I've seen that show it's not the greatest gear oil.

 

[69GWC]

IMO gear oil in this order:

1. Redline
2. Amsoil SG
3. Mobil 1
4. Pennzoil Platinum (if you can find it)

I would stay away from Lucas based on several independent tests I've seen that show it's not the greatest gear oil.

Dont forget about Royal purple , it does not look good in those test either..

 

[JB1]

Get this Redline and buy it from Nick, he keeps it in stock and has the best price. No other additive needed for LSD

 

[MidwestJ]

Ill be going with redline based on all the believers/threads on here.

 

[pacofortacos]

IMO gear oil in this order:

1. Redline
2. Amsoil SG
3. Mobil 1
4. Pennzoil Platinum (if you can find it)

I would stay away from Lucas based on several independent tests I've seen that show it's not the greatest gear oil.

Is my list also - I run Redline

 

[jasonw]

I use Amsoil Severe Gear. But I don't think you can go wrong with either it or Redline. Mobil 1 is decent as well.

Whether Redline or Amsoil SG need additional friction modifier seems to vary. Most do not need it, some do. I needed a little bit, my rear end liked to complain when I'd make a turn while reversing. Added two ounces (half of what the directions on the bottles say), and no more issues.

I haven't heard a lot about Valvoline here yet. I've heard it is decent as well.

 

[Ram Night]

If you want something local off-the-shelf and proven over many years, get the Mobil 1 synthetic with already added friction modifier at your local auto parts store....

I have used this for many years, and have never had any issues. Be sure to get LS 75-140 for the rear diff.

 

[RedSRT4Me]

I used aFe gear oil when I did my 4.56's and rear diff cover

 

[Wahrsuul]

I see someone saying 75-140 for the rear diff, but then I see elsewhere (http://dodgeram.info/tech/BRSpecs/fluids/specs.html) that for the standard rear diff it's 80W-90. Which is correct? And how much would I need?

 

[Dark Knight 500]

Ill be going with redline based on all the believers/threads on here.

X2 I see a LOT of faith in it on this forum


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[Dark Knight 500]

I see someone saying 75-140 for the rear diff, but then I see elsewhere (http://dodgeram.info/tech/BRSpecs/fluids/specs.html) that for the standard rear diff it's 80W-90. Which is correct? And how much would I need?

I would say it depends on the year, and what axles you got. I always go by the owners manual personally.
In my truck, it’s 75w85 (75w90) in the front and 75w140 with additive in the rear


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[huntergreen]

I see someone saying 75-140 for the rear diff, but then I see elsewhere (http://dodgeram.info/tech/BRSpecs/fluids/specs.html) that for the standard rear diff it's 80W-90. Which is correct? And how much would I need?

That yellow looks great on that ram. Yours ?