American Axle,...new info

[geusterman]

Is the 75/90 synthetic recommended for limited slip as well? George

 

[amsoilman]

Is the 75/90 synthetic recommended for limited slip as well?

The AAM axles do not have plates or discs, so additives are not required for slippage.



I use the Amsoil series 2000 75W-90 in mine and it has been doing a good job. Still has the blue color on the "Mag-Hytec" dip stick after 33,000 miles.



Wayne

amsoilman

 

[Dean Upson]

There was a great deal of confusion when the '03's first came out about using the heaver weight oil when "towing heavy". This requirement was for the Dana Axles. From what I can gather some of the late MY '02's were filled with the lighter weight oil and there was a notice sent out that these should be refilled with the 75w190. I had an early '03 and was shown this notice and after reading it, saw that it pertained to earlier trucks that did not have AAs.

75w90 full synthetic is recommended for our axles. The D/C 75w/140 product is not a full synthetic, there fore it is not recommended. No additives are recommended because some additives have "cleaners" in them that will eat up the seals after a period of time. My axle runs cool enough with the 75w90 towing my heavy fiver and there is no need to use the friction additive, also according to AA.



Dean

 

[OT-OF-HERE!!]

Originally posted by BStoecker

Gee, imagine DCX requiring us to use 75/140 synthetic lube that is difficult to find locally and sells at the dealership for $20/qt instead of the more easy to find 75/90 weight that is 75% cheaper...

Don't get your blood pressure up,. . but what I meant was you say above "imagine DCX requiring us to use 75/140 synthetic lube ... etc. " The synthetic that AAM axle recommended was 75/90 and not the 75/140. That's all I meant and if I'm still misreading what you posted I apologize.

 

[Shooter]

Way back when: I called AAM and they said DC is the one reccomending the 75/90 but if it was them they would run 75/140 for heavy towing. So at 5k mi I put in 75/90 front ( no load ) and 75/140 rear. Royal Purple , NAPA, Flying J ..... 20k ( 15k towing ) on now and no problems.



JMHO

 

[Yo Hoot]

Originally posted by Shooter

Way back when: I called AAM and they said DC is the one reccomending the 75/90 but if it was them they would run 75/140 for heavy towing. So at 5k mi I put in 75/90 front ( no load ) and 75/140 rear. Royal Purple , NAPA, Flying J ..... 20k ( 15k towing ) on now and no problems.



JMHO

That's the advice given to GM HD owners. Heaver stuff for heavier conditions.

 

[Dieselnut59]

Originally posted by scootergmc

Yeah, I saw it after searching around. Seems Walmart isn't slashing prices after all.

EXACTLY!!!! And the prices they DO slash are on items they have outsourced to China! I don't know why ANYONE would do business with that company!!!!!!!!!!!!!

 

[thejeepdude]

Originally posted by Dieselnut59

I don't know why ANYONE would do business with that company!!!!!!!!!!!!!

Where else can you get a large can of brake cleaner, carb cleaner, or engine degreaser for 88 cents? They also have some <american made> boat accessories at better prices than my local marine store (talk about a ripoff).

 

[stevenknapp]

but it was 75W-140.



I found Mobil1 in that weight at Pep Boys, go figure.

 

[Briman]

I'm getting set to go on a 3000 mile trip with a 10K trailer. I just picked up Redline 75-90 for the front and 75-140 for the rear. In SLC at Six States Distributors the Redline is $10. 10/quart.



I think in hot weather and with a heavy load I would be remiss to use anything but 75-140 synthetic in the rear.

 

[badams1]

Mobil 1 GL 5 75-90w in my 03 HO, pulling a 12klb 5er through colorado mountains and the rearend stayed cool on the hottest days pulling the 6-7% grades pushing it hard with my Sixgun on 6. Less than 200F under the most severe condtions. Thats great in my book and Mobil1 is a true PAO synthetic not a generic and it is worth $6. 00 a quart. My 2cents

 

[ACerf]

Just purchased the Diff cover from Mag-Hytec. I am going to use 75W90 Amsoil 2000 Series oil. The 03' book states to use the 75W90 "without any additives", In VERY LARGE, and BOLD lettering. I think the 75W140 would be okay to use, but it is not recommanded by DC. At least according to the dealer that is! Since I will have the ability to change the oil more often, it doesn't really matter much! Plus I will have 2 extra quarts oil in there working!