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Rear differential confusion- and how much and what type of oil?

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Old Feb 15, 2020 | 08:58 AM
  #11  
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Hi Well for years I felt sure that my 2001 dodge ram 2500 has the limited-slip diff. so I applied the friction modifier. If it doesn't need the modifier I don't know if it will do any harm. I just learned that it has the corporate 9 diff. but I am still not sure if it is LSD or not. The sticker under the hood says that the ratio is 3.92; page 1 of 1 4stars and then the num. -0370780. What is t.o.n 61310348?
 

Last edited by frankiedon53; Feb 15, 2020 at 09:05 AM. Reason: would like to add that I am using LUCAS 85w-140 because it has a lot of back lash wear and I bought the van used when it was 5yrs. no friction mod is needed according to lucasr
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Old Feb 15, 2020 | 09:35 AM
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Originally Posted by frankiedon53
Hi Well for years I felt sure that my 2001 dodge ram 2500 has the limited-slip diff. so I applied the friction modifier. If it doesn't need the modifier I don't know if it will do any harm. I just learned that it has the corporate 9 diff. but I am still not sure if it is LSD or not. The sticker under the hood says that the ratio is 3.92; page 1 of 1 4stars and then the num. -0370780. What is t.o.n 61310348?
So you have an 8 lug Chrysler 9.25? Never seen one of those.
 
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Old Feb 15, 2020 | 09:40 AM
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Originally Posted by 00t444e
So you have an 8 lug Chrysler 9.25? Never seen one of those.
They came in the Light Duty 3/4 ton trucks, from 94 to 95. After that, I think the light duty version was discontinued.

An 01 2500 should have a dana 60 rear, at the very least.
 
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Old Feb 16, 2020 | 09:13 AM
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Hi 00t444e. Yes eight studs on the wheel hubs if that is what you mean by lugs? I forgot to mention that my diff has 12 bolts on the cover. Frank
 
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Old Feb 16, 2020 | 09:34 AM
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Originally Posted by frankiedon53
Hi 00t444e. Yes eight studs on the wheel hubs if that is what you mean by lugs? I forgot to mention that my diff has 12 bolts on the cover. Frank
Is it a full float axle, do the axle shafts bolt in at the hubs?
 
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Old Feb 16, 2020 | 12:42 PM
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Originally Posted by 00t444e
Is it a full float axle, do the axle shafts bolt in at the hubs?
If it's the Chrysler 8 lug no, but that is a way to tell the difference
 
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Old Feb 16, 2020 | 01:20 PM
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Originally Posted by MoparFanatic21
If it's the Chrysler 8 lug no, but that is a way to tell the difference
Yes but I have hard time believing a 01 2500 came with an 8 lug Chrysler 9.25 rear. Based on what I have seen and the info I have read the Dana 60,70 or 80 where the only rear axles they put in the 2500 in 01.
 
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Old Feb 16, 2020 | 02:07 PM
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Originally Posted by 00t444e
Yes but I have hard time believing a 01 2500 came with an 8 lug Chrysler 9.25 rear. Based on what I have seen and the info I have read the Dana 60,70 or 80 where the only rear axles they put in the 2500 in 01.
You would be correct that the Chrysler 9.25 8 lug wouldn't be in an 01. But someone could have changed it not knowing about the LD and HD models
 
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Old May 26, 2023 | 06:04 AM
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"all 1500's have the chrysler 9.25 (9-1/4)"
NO, THEY DON'T. Everything else was spot on
 
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Old May 26, 2023 | 08:46 AM
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Originally Posted by lambsdenrams
"all 1500's have the chrysler 9.25 (9-1/4)"
NO, THEY DON'T. Everything else was spot on
Way to show that guy from August 28, 2010, tiger!

Also excellent tech by not explaining what other than the 9.25 was used?
 
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