nailzsn

The rear axle on my 2003 truck had a whine so the bearings were replaced. The service order says part 4874459 was used to fill it. I have read here and at TDR that, per American Axle, mopar part 05102232AA should be used. My dealer's tech says they don't even list that part number. He also says that 4874459 is GL-5 SAE lube (which is called for in my owner's manual). Oddly enough - in my manual's recommended lubricants page, it shows this:<br><br>Manual Transmission Fluid NV 4500 | Mopar 75W Synthetic, API grade GL4, Mopar P/N 4874459<br><br>1. So is part 4874459 GL4 or GL-5?<br>2. Do I have anything to worry about on the fluid they put in?

bulabula

WHOA! Your wires are crossed. The part number you reference: 4874459 is a GL-4 lube for a NV4500 manual transmission (according to my manual). Not for use in axles. I wouldn't use it for long. I do know for sure that you're not to use GL-5 in tranny's because the high pressure additives in it are corrosive to the soft metal synchro's (been there done that - bought a t-shirt&amp;tranny); but am not sure if using GL-4 is harmful to axles. I do know that some GL-4 lube doesn't carry as high a load rating as GL-5.

The AA Mopar P/N you list as 05010320AA is what the dealer gave me to put in my axles when I found them low. It is indeed GL-5. Label says 75W-90/GL-5. The almost empty bottle is sitting right here. There are no other clear MOPAR numbers that I can see on it. The 05...AA is also listed under the bar code. There is a MS-9763 on it too if that helps.

hth

Casey Balvert

Your tech is wrong. Get that stuff out of there. The right stuff says Mopar and that it specifically for AA axles. And that number does exist. You might want to look for a dealer that is more careful as well.<br><br>Casey

nailzsn

Bulaba, the Dealer has his wires crossed. I saw the same thing you did. I even read it to him. His response was that the stuff they used (4874459) was GL5 and the number I gave him (05010320AA) they could not find. I called a different dealer where I have purchased parts. He said he found and was holding a bottle of it in his hands. He also said it was $16 a quart versus the 4874459 which is $21 a quart. <br><br>One more point from the secondary dealer. He called back and said the 4874459 was synthetic 75-85W versus the right stuff which is 75-90W; not a big difference but I would think using what the axle manufacturer recommends would be best. It is odd that the dealer does not have the recommendation from American Axle.<br><br>Anyway, I called local dealer and told him to order the right stuff - I gave him the other Dealer information where he could get it if he has trouble finding it.<br><br>Thanks for the feedback guys

The Boss Hog

Now you guys have me a little worried. ??? I had the diffs serviced before I left on vacation. The dealer put in p/n 4874469 in both diffs. Is this the same as 05102232AA? If not, what weight/ grade is it?<br><br>The Boss Hog<br>(home at last )

BYGBRI

Somebody is doing something wrong.<br>I was at the dealer buying GL-5 for my new '03, although I had not checked the diffs and the dealer was supposed to, I could see though the window many axles on pallets waiting for...?<br>I told the cashier that they should read the web sites, they would know what the problem is or a good indicator of why the axles/bearings are going out, they just laughed.<br><br>Anyway, I got home, checked mine: rear was 1.2 qts low and the front 1/2 qt low.<br><br>This gave me time to get some numbers off the engine and just look at the &quot;beef&quot; compared to my &quot;gotten rid of&quot; F150.<br><br>I love this site.

nailzsn

Does anyone have the phone number to call American Axle, since the dealers are somewhat confused about the fluid. I looked at a web site for them but the phone number was to a manufacturing plant.

doug

AA verified to me that there has been some confusion at the dealerships with regards to the right lubricant. They (AA) are in the process of educating DC wrt the correct lubricant, and have supplied the Star system with the correct info. <br><br>so any dealership that calls the star support tier has access to the correct information. <br><br>AA also informed me that the dealerships are confusing the placement of the fill hole with the indicator for the correct fill level. The deal here is that the fill hole is not the correct indicator for fluid levals! They use the same casing for many of their gear configurations, and put the fill hole in the same place for all of them. For example, the actual amount of lube in the 11.5&quot; axles is correct as shipped, but will be perceived incorrectly to be low because the fill hole is higher than necessary for this axle.<br><br>To be sure, &quot;over&quot; filling the axle to the fill hole is ok as long as the correct lubricant is used of course. Compounding this whole issue is the fact that the lubricant shipped from AA is fully 100% synthetic 75W-90, and the practice of topping off the axle with certain Mopar (not fully synthetic) lubes is baaaaddd. -Doug

doug

[quote author=The Boss Hog link=board=20;threadid=16380;start=0#154698 date=1056909967]<br>Now you guys have me a little worried. ??? I had the diffs serviced before I left on vacation. The dealer put in p/n 4874469 in both diffs. Is this the same as 05102232AA? If not, what weight/ grade is it?<br><br>The Boss Hog<br>(home at last )<br>[/quote]<br><br>No, they are not the same, and no, the way it looks to me they put the wrong stuff in there. AA clearly states 75w-90 100% synthetic gear lube is what belongs in their axles. If you ask me it looks like 05102232AA is the right stuff. If I were you I would:<br><br>1. Make sure you have it irrefutably documented that they put 4874469 in your axles, including how much they put in (did they top it off or replace all the fluid). just curious, but why did they do this? <br> <br>2. Speak with the dealer service manager and insist that they call the star line to ask what the correct lubricant is.<br><br>3. call AA and verify this information. You may not be successful in this step since AA might not be willing to state a Mopar part number. However, the Mopar Star line has the latest information from AA.<br><br>4.Assuming they put the wrong stuff in there, then I would talk to the dealer service manager immediately about replacing both your axles. Request escalation to the district manager if necessary. If they resist, tell them that the internet community is all aware that they put the wrong fluid in your axles, directly against the recommendation of AA, and ask them what story they want you to tell us on this forum regarding how they resolved this. Make sure and tell them that running 4874469 in the axles is against the mfg recommended fluid and that mixing fluids is also against AA recommendations.<br><br>BTW, I am not independently asserting that 4874469 is the wrong lubricant. That’s just my opinion based on how I read the discussions and my conversation with AA. I for one would really be interested in the “word from the Star line” on this. <br>--Doug

bulabula

One thing bothers me with all this, is that I don't even see 4874469 listed in my manual. I see 4874459, but not the 4874469. Maybe its the same viscosity GL5 but not synthetic? For '02's and earlier maybe? Heck, some dealers took forever just to stock oil filters for an '03. Same goes for my local Cummins Power Store. <br><br>This whole discussion has me thinking that I'll take some time off the boat this weekend and do both my diffs with Mobil 1 or something and not have to wonder anymore. Jeez, maybe I'll do it all while I'm under there. I'm almost at 13K now anyways.<br><br>Boss, I'm not one who likes to mix oil(s) - especially unknowns, so I'm thinking it may be a good idea for you too.