Limited slip additive - Dodge Cummins Diesel Forum
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post #1 of 13 (permalink) Old 01-24-2020, 04:05 PM Thread Starter
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Limited slip additive

Can anyone clarify if I need to purchase limited slip additive for 06 2500 11 1/2 AA differential. The manual states if its a Trac-Lok Differential then additive is needed but if its a Trac-Rite EL then not needed. The dealership had no idea what I was talking about.
On another note I read if the clutches inside the diff that lock up are worn and not adjusted regularly (75K miles or so) that no longer will the diff go into full lock and then what would be the point of the additive.
Need some education, thanks

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post #2 of 13 (permalink) Old 01-24-2020, 07:02 PM
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I don't believe there was an axle change between 04 and 06. My 04 11.5 AAM has a Torsen style LSD, requires no LSD additives (aka there are no clutch packs).
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post #3 of 13 (permalink) Old 01-24-2020, 08:55 PM
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Only time I've seen people say to add it, is if they chatter from a stop making an immediate turn. My front did this and I opted to do the 75W140 route instead. That shut mine up.

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post #4 of 13 (permalink) Old 01-24-2020, 10:06 PM Thread Starter
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The MOPAR manual does not state the AAM is a Torsen, so I am guessing your diff is not OEM. I really wish I had a Torsen because that system is great and simple...just pure mechanics. Its been a while since I saw the guts of my diff but I am 99% sure its not a Torsen gear setup. So back to the original question about the additive, anyone?
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post #5 of 13 (permalink) Old 01-24-2020, 10:15 PM
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I ran 75w85 limited slip fluid and a bottle of mopar limited slip additive in mine. Try running without additive and if you need it, itís a small bottle that only holds a few oz so it wonít yet to add later.

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post #6 of 13 (permalink) Old 01-25-2020, 11:30 AM
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The AAM rearend uses a different style locker that never requires additive.

2003 Dodge Ram 2500, QCSB, 4x4, Nv4500 w/ mainshaft, Valair clutch, Edge Evo2, AFE Bladerunner, ARP Studs, SRT10 Hood, Sport front, 285 Falkens. Laramie interior. 09 steering. Redhead + Borgenson 275,000 miles and counting + 2013 Ram 5500 4x4 6.7 aisin CC 11' bed
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post #7 of 13 (permalink) Old 01-25-2020, 12:11 PM
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No clutch discs inside
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post #8 of 13 (permalink) Old 01-25-2020, 12:42 PM
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Quote:
Originally Posted by liska View Post
The MOPAR manual does not state the AAM is a Torsen, so I am guessing your diff is not OEM. I really wish I had a Torsen because that system is great and simple...just pure mechanics. Its been a while since I saw the guts of my diff but I am 99% sure its not a Torsen gear setup. So back to the original question about the additive, anyone?
11.5 AAM DIFFERENTIAL , if equipped with antispin, is an AAM Trac-Rite GT

DESCRIPTION
The TracRite™ differential is a helical gear differential.
The differential has two side gears, six pinion gears and six pinion brake shoes.
Trac-Rite™ differentials DO NOT require Limited Slip Additive.

AAM ID info here
http://www.demandaam.com/product-cat...tion-enhancing
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post #9 of 13 (permalink) Old 01-25-2020, 12:43 PM
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Do not "require", but I've found some Track-Rites did better with some additive

R12 in the summer, Webasto in the winter; cassette tapes & SAE-20078 all year.
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post #10 of 13 (permalink) Old 01-25-2020, 07:01 PM Thread Starter
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Perfect, thanks as always!
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post #11 of 13 (permalink) Old 01-29-2020, 03:10 AM
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Its a torsen style differential.. and Im sure someone will correct me on exactly what style it is from there. Yeet.

2007.0 Ram 2500 MCSB Laramie - FASS150 - VB BY DYNAMIC - 2" THUREN SUSPENSION - 13.8s 1/4 - MM3 - STOCK INTAKE AND EXHAUST.. WERE RECYCLED, YEAH THAT. - AMPs - LOTS MORE STUFF SOON
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post #12 of 13 (permalink) Old 01-29-2020, 03:53 PM
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2 informative links on Diffs.
difference explained.
https://www.carthrottle.com/post/eng...table-for-you/

Old but basic.

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