ValkSmile

I have read some stuff about adding limited slip additive when changing the diff fluid. If I add some Mobil 1 Syn or Valvoline SynPower 75w-90 in my 2006 2500 do I need to add the limited slip additive? Yes I do have a limited slip in my truck............Thanks So many threads so little time

Rpainter

no the limilted slips in the aam axles are conical units

donhov

Normally you do not need the limited slip additive but if you get chatter and grabby it will not hurt to add it. Would only add if you have a problem, other wine it is not needed in 95% of the cases.

ValkSmile

Ok thanks guys, on my way out to buy some new fluid now.

TurboTed

If you are towing or hauling add it. My brother and I have had 5 third gens between us, and they chatter if under load around corners and from a start. The additive still gets rid of that.

ptgarcia

Exactly what additive does one add? I'd like to try it when I change the rear end gear oil this week.

ValkSmile

Yea guys, what kind, how much do I put in, and where to get it?

Thanks....

ValkSmile

My owners manual says that the "2500/3500 axels do not require limited slip additive" So what gives? Book says no to add it.

Raspy

My diff began to chatter too. Just a bit as I would start to move while towing or loaded and with the wheels turned. So I went to Mobil 1, 140 weight oil and cured it. It seems like an easier and more sensible solution than getting the limited slip additive. Wasn't there a TSB on the diffs saying the heavier oil was recommended?

John

TurboTed

You buy it at Dodge dealerships in a small bottle (A few ounces). I forget the exact name. Get them to sell you the little "squirt" top as well. It makes it easier to pour it in. (it's made by dodge.)

ptgarcia

It says its not needed, but some have cured there little rear end stutter, or whatever you want to call it, by adding some. I'm changer the gear oil this week with Mobile 1 75w-140 but thought I'd try a little anyway.

05 CTD2500

Mine used to chatter every time on sharp turns, after changing to Royal Purple 75w - 140 only chatters when its wet now.

Hounddog

Had to use it in mine after towing 10k several hundered miles.Chatter hot was bad! Once it cooled down was ok until the next pull of several hundered miles.I grabbed a bottle at a Auto Zone and added it in their parking lot and that was the end of the chatter.

vzdude

I can't for the life of me figure out why so many have convinced themselves that this helps there truck! LOL There are NO clutches in the 3rd gen AAM axles. Maybe some are referring to their 1500's or something? AAM is the OOONLY axle available in the rear for 2500 and 3500 trucks! No additive required at all. NADA! ZERO! ZIP! If you don't believe me....call your dealer with your vin, figure out which axle you have in the rear, and which limited slip you have. Here's a chart to follow once you have all that info.

AXLE
NOTE: DaimlerChrysler recommends using Mopar® lubricants or lubricants of equal quality.

FRONT AXLE
C205F - Mopar® Gear Lubricant 75W-90
9 1/4 AA - Mopar® Synthetic Gear Lubricant 75W-90
9 1/4 AA EL- Mopar® Synthetic Gear Lubricant 75W-90
REAR AXLE
9 1/4 - Mopar® Synthetic Gear Lubricant 75W-140
10 1/2 AA - Mopar® Synthetic Gear Lubricant 75W-90
10 1/2 AA EL- Mopar® Synthetic Gear Lubricant 75W-90
11 1/2 AA - Mopar® Synthetic Gear Lubricant 75W-90
248RBI - Mopar® Gear & Axle Lubricant SAE 90
NOTE: Trac-Lok® differentials require Limited Slip Additive in the lubricant. Trac-Rite™ / Trac-Rite EL™ differentials DO NOT require Limited Slip Additive.

vzdude

OPERATION




CAUTION: The differential is serviced as an assembly only do not attempt to disassemble. Failure to follow these instructions will result in damage to the differential.

When one wheel begins to spin the pinion gears (2) on that side, are forced toward the pinion brake shoes (1). The pinion brake shoes then cause frictional drag on the opposite pinion gears and the side gear. These friction forces transfer the power to the opposite wheel. Once the frictional forces are overcome, differentiation will occur. The torque will be continually biased by the frictional forces to the high traction wheel.