Synthetic Axle Gear Lubricant
12-26-2006, 09:03 PM
#16
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I read about it over on the Carson Dodge website. I think it was in their parts information . . Servicing rear differentials. Also read about it in the TDR mag . . has a reference number of 999925743 . . think that ust be some shop/service notice because it has a different number structure than TSB's. Hope that helps. Also, when I was reading the Carson materials, i noticed that there was a comment about the AAM Limited Slip diffs NEEDING the additive that our manuals say we don't need. Lots of info from John Holmes regarding diesel trucks and their upkeep. Straight from a dealers mouth.
CD
CD
12-26-2006, 09:09 PM
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I put in same weight as Wap. 75/140 Moboil one. 15 bux quart. Big Dave sounds like a fun day. I don't blame you, I would go back in see what they put in your diffs.
12-27-2006, 06:56 AM
#21
nelrod, you runnin that weight in the front too?
I got the 90 in the front but if it needs to be 140 I will gladly change it out, and if anybody has a definative answer and what weight we are supposed to use (90 or 140) please let us all know.
I got the 90 in the front but if it needs to be 140 I will gladly change it out, and if anybody has a definative answer and what weight we are supposed to use (90 or 140) please let us all know.
12-27-2006, 03:24 PM
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Guys check this page out on the Carson City Doge Forum that I was referred to by CD in NM. After reading this I will be using 140 in both diffs. Hope this helps...
http://www.carsondodge.com/Forums/sh...ight=999925743
http://www.carsondodge.com/Forums/sh...ight=999925743
12-27-2006, 05:00 PM
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Wap, I put 75/140 in front too. Gets hot here in Carolina in summer, and I go to Alabama where I am from, so i just put it in both. I don't see the harm. You're in Georgia, pretty dang hot there too in summer.
12-27-2006, 05:19 PM
#25
Well what the heck, I reckon I will have to change the front to 140 and while im there I might as well change the rear out too for good measure.
Its been a while since I changed mine, wont 7 quarts do the job?
Its been a while since I changed mine, wont 7 quarts do the job?
12-27-2006, 05:30 PM
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Yep WAP --- 7 outa do it, seems like 4 in rear with a little overfill ( didn't want to keep a fifth of a quart. And Front was either 3 or almost 3. What you close to in GA. I used to live in Thomaston as a kid (near Maccon I think) and also Newnan Ga. Cool State, just came thru there and was wondering where Gay Ga. was, bought a used 20 ft. g.neck form my bro in law near B'Ham and pulled it back with my wife Christmas night to avoid traffic. I love pulling stuff don't you. Just wish I could have had something heavy on it. I love the G-56 too. Can't seem to slow it down.
12-28-2006, 09:52 AM
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Guys I sent John Holmes at Carson City Dodge an email last night about using 75W140 in the front diff in cold weather and he was his response.
Ken, I recommend the 75W-140 in the rear specifically, but it's not necessary in the front. I use it in both because I don't want to have to stock it and 75W-90, although the 140 is quite a bit more expensive than the 90...your choice. As for winter driving, synthetics are best and the first # is the cold "reaction" of the lube and the second # is the lube's "reaction" to hot driving conditions. So, to answer your question, both lubes will operate identically in cold weather. However, the 140 will perform much better under load when the diff get really hot. Pulling in the summer in the mountains, even with the synthetic, which lowers temps about 75 degrees, I see 190-200on long grades. John
Ken, I recommend the 75W-140 in the rear specifically, but it's not necessary in the front. I use it in both because I don't want to have to stock it and 75W-90, although the 140 is quite a bit more expensive than the 90...your choice. As for winter driving, synthetics are best and the first # is the cold "reaction" of the lube and the second # is the lube's "reaction" to hot driving conditions. So, to answer your question, both lubes will operate identically in cold weather. However, the 140 will perform much better under load when the diff get really hot. Pulling in the summer in the mountains, even with the synthetic, which lowers temps about 75 degrees, I see 190-200on long grades. John
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