Synthetic Oil

[smiley]

Damn Smiley you've had nothing but problems with that rear diff. Maybe a thinner gear oil would lubricate everything better since things are spinning faster than stock?

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I have tried both 75W-90 and 75W-140 had failures with both. I figured the 75W-140 would be better protection since faster equals more heat is likely.

All was good on the rebuild until now and it sounds terrible. I hate the 9.25 axle.

 

[smiley]

^^This may be true^^ Plus, you do live in the frozen tundra...

Same when cold though so why would that matter?

 

[R.L.K.]

Brand new original song. This was recorded yesterday on the front porch of my little hunting cabin in the woods. I'm playing an '03 Gibson J-45 and my buddy is playing a 1933 Gibson mandolin. Classic Americana, baby. "Used Up"

Awesome !!!

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[Rampant]

Same when cold though so why would that matter?

Because although you may let the engine warm up when it's -50F, you can't really let the rear end warm up unless you drive very slowly for a fair distance. If you let the engine warm up and take off at highway speeds when it's very cold and you have thick oil in the diff(s), it's like taffy and can't lubricate. Until it does warm up and thin out, a ridiculous amount of friction/wear and heat are taking place, but it is localized on the gears & pinion.

 

[dexter]

Why hasn't this oil been discussed?




Ravenol

• Meets the proper MS-12633 oil specification and viscosity requirements for the Ram 6.4L V8 gasoline engine.

https://www.amazon.com/BLAU-J1A9507...d=1525730696&sr=1-2-catcorr&keywords=MS-12633

 

[Rampant]

Why hasn't this oil been discussed?




Ravenol

• Meets the proper MS-12633 oil specification and viscosity requirements for the Ram 6.4L V8 gasoline engine.

https://www.amazon.com/BLAU-J1A9507...d=1525730696&sr=1-2-catcorr&keywords=MS-12633

It has been discussed here before. It looks like a good oil, but it's a little too thin for a 40wt and the NOACK is a bit high for me.

 

[69GWC]

My dads 9.25 had to be rebuilt about 120k too. Completely stock.

I think my issues are due to the regear to 4.56. It must be too many rpms or something.

Do you have the stock rear cover or after market ?

Have you ever put a temp gauge to the rear end to see what your temps are like. ?

Ram seems to think from what I can figure is there is not enough fluid to cool the rearend with a thinner 75/90w oil like the 2500s so they spec out the thicker 75/140 to help cool it.

Just wonder like you said the 4:56s are heating it up to much for the smaller amount of oil to be able to cool.

 

[U&A]

I was thinking the same thing ? Maybe try a 90 wt ...
Seems more mechanical to me like to much or not enough backlash in the ring & pinion , either way too tight or too loose will cause issues . Sounds like maybe too tight would cause more noise while under normal load and too loose of a backlash would cause an audible and feelable clunck .



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Exactly what I was going to say. I bet it’s just improper installation doing gears is not as simple as most think. Its kinda a big deal.

 

[U&A]

Brand new original song. This was recorded yesterday on the front porch of my little hunting cabin in the woods. I'm playing an '03 Gibson J-45 and my buddy is playing a 1933 Gibson mandolin. Classic Americana, baby. "Used Up"

My favorite of yours I think

 

[U&A]

Do you have the stock rear cover or after market ?

Have you ever put a temp gauge to the rear end to see what your temps are like. ?

Ram seems to think from what I can figure is there is not enough fluid to cool the rearend with a thinner 75/90w oil like the 2500s so they spec out the thicker 75/140 to help cool it.

Just wonder like you said the 4:56s are heating it up to much for the smaller amount of oil to be able to cool.

Technically a thinner oil will heat faster BUT shead heat much faster that a thick one. The thick one will just take longer to get hot BUT once its hot its much harder to cool.

 

[Hemi395]

I think Smiley does have an aftermarket diff cover but I don't remember what kind or if it has added capacity.

One of the things that drew me to the MH cover was the added capacity. More fluid = better cooling.

 

[AFMoulton]

He has the G2 cover. Which is what I was going to buy for my 1500 when I had it


2018 2500 6.4 4x4 4.10 Amsoil SS 0w-40
2016 Durango 5.7 AWD 3.07 Amsoil SS 5W-30

 

[Murphy Slaw]

Thanks for the kind words, all.

Looks like I'm taking the Bighorn to Louisiana this summer. The wife's mother is getting up there in years.

On the upside.....

Boudin !

 

[HammerHead]

Exactly what I was going to say. I bet it’s just improper installation doing gears is not as simple as most think. Its kinda a big deal.

I agree; dealership put my 410's in and put to much tension on the pinion bearing, it lasted 20k. Then had a local shop overhaul the rear end by installing new bearings throughout, it sounded like an old hound dog moaning and groaning. Made the strangest noises.

 

[R.L.K.]

Thanks for the kind words, all.

Looks like I'm taking the Bighorn to Louisiana this summer. The wife's mother is getting up there in years.

On the upside.....

Boudin !

Don't forget the Crawlfish / mudbugs !!!

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[R.L.K.]

We are having our company Crawlfish Boil next weekend , I've been the cook at them for 19 years I'm so damn ready !! It's usually between 350 - 500 lbs of Crawlfish depending on the turnout of people .


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[U&A]

We are having our company Crawlfish Boil next weekend , I've been the cook at them for 19 years I'm so damn ready !! It's usually between 350 - 500 lbs of Crawlfish depending on the turnout of people .


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Never had it. Have alway wanted to try them

Have you had a Michigan *****?

Like a hand held home made pot pie in a way.

 

[Ramnewbie]

I thought *****'s were something else, always thought Michiganders were a little different.

Never had it. Have alway wanted to try them

Have you had a Michigan *****?

Like a hand held home made pot pie in a way.

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[R.L.K.]

Never had it. Have alway wanted to try them

Have you had a Michigan *****?

Like a hand held home made pot pie in a way.

Never heard of that ?

Speaking of Michigan , today I worked on a Michigan State Police Helicopter in our shop here in Bristol , Tennessee... Small world [emoji1303][emoji1303]

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[R.L.K.]

I thought *****'s were something else, always thought Michiganders were a little different.

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Ha ha , they are a bit different [emoji1303] just read his post LOL ! This crazy feller is planning on burning 8+ chords of wood for heat this year [emoji16][emoji16]

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