It does.
Billy

 

Does the rear MH hold somewhere around 7-8 quarts?

I just bought 8 quarts of Amsoil 75W-90 Severe Gear ($11 per quart) and was hoping it would fill the MH.....

 

D45, 8 quarts should do fine. Im sure it's not any more than that if you are only doing the rear.

I usually just keep 2 or 3 extra quarts (Mobil 1) around because even if I don't use it now, I just put it back on my shelf in the garage and use it the next time.

..

 

OK Folks,
My rear axel is chattering. I have tried AMSOIL and now Royal Purple.
The rear end is out of warrenty, so what would be the differance in running a non-synthetic vs syntetic?
I am going to switch to a higher weight, 85-140, and it is to difficult to keep the same syn lube while working on the road. I can get the non almost anywhere it seems in that weight. Also, have heard that the heavier wt may help with the chatter.

 

There's not much that can be done to stop the chattering with the AAM TracRite. It locks up in a tight turn and makes the tire chatter. Not too good for the tires but I've learned to live with it. I don't believe running heaver oil will help with chatter. About the only thing you may get running heaver oil is higher temps.
Billy

 

Just did my diffs last week, Valvoline Synthetic 75w-90 front and rear per the manual. Cost about $45 total (but I got a deal on the gear oil).

Then I found a TSB that says that 75w-90 dyno is fine for the front and 75w-140 in the rear.

BTW, I might be called a heretic for suggesting this, but I don't think it's necessary to completely remove the covers every time you change the diff fluid. Just clean off the top of the pumpkin good (to make sure no dirt drops in) and loosen the bolts until it starts draining. Re-tighten cross-wise to 27-ft-lbs and clean the magnet/plug before refilling. Saves a lot of time, especially with the front diff.

 

That's the way the dealer does it but I like to take the cover off so I can have a look inside. I also like to take a rag and wipe out the bottom of the housing. There's a little pond of oil in there.
Billy

 

SOhappy,
When you say "dyno" does that mean the TSB says regular real old fassion gear lube?
I kinda look at it like the debates between Syn and Dyno motor oils...
I do need a heaver wt for towing.
Non of the chattering happended untill I switched to AMSOIL. Also, my front pinion seal is now seaping, also after a switch to AMSOIL. May be nothing, but I am wondering....

 

Yep some of the seals are not resistant to some of the synthetic oils base stock. " They will soften and fail" I have heard of folks replacing several seals before having to go to dino oil. Viton is about the only material not affected by the synthectic base stock. I would bet these differentials come factory filled with dino oil.
Billy

 

I might agree with you on the factory fill even tho the owners manual says syinthetic

 

With my camper on 24/7,I changed my factory fluid in the rear@ 9200 miles and it stunk to high heaven. I replaced it along with a Mag-Hytec with Amsoil Severe Gear 75-90. It's going to be in there for awhile. P.S. My rear axle weight was 4,000# for the 9200 miles and continues to be.

 

Factory fill is GL-5 synthetic, put it back in everytime for the last 135k. No leaks, never looked bad, never smelled bad.

Some seals leak for whatever reason, probably just cheap from the start.

 

How they could tell the difference between 75W90 and 80W90 is beyond me...did they send it to their "on site" oil lab or something? As for the reason they gave you (grape juice), that is silly.
Sounds like you got the loser that day...

 

The TSB your talking about was Not for 3/4 and 1 ton trucks with 10.5 and 11.5 axles, it was for the 1/2 ton aka 1500 pickups with smaller axles. FYI, GL-5, 75-90 synthetic gear oil is what came in our axles from the factory and what is required to be use though some do like to use the new 75/110 gear oil.

 

No, I'm positive it applies to our trucks. Dyno in the front, synthetic in the rear. I know the TSB you're talking about, but this is different. I've scanned it in and posted it below FWIW.



Interesting that the same TSB Rev A on dodgeram.info doesn't say Dyno.

The confusion is contagious, check out these links:

http://www.turbodieselregister.com/f...01-04-rev.html

https://www.dieseltruckresource.com/...ad.php?t=68224

I'm guessing the TSB I printed out (75w-90 non-synthetic front) is an error, and it appears they fixed it on dodgeram.info and TDR (probably there or TDR is where I printed out in the first place).