rear differential carrier bearings

[MPalachuk]

Read up on brake in for differentials. The lsd units I replaced for the AAM were because they locked up and were like a spool. The True trac has about 25-30% better Bias.

 

[CVR222NV]

See the attached for an exploded view of a Truetrac. Appears to be nothing but gears. Simple. Mechanical. No Air. No electric. The beauty of it lies in the drivability. Open differential when not needed and locks when you loose traction. And trust me you know when it locks. Looks like Eaton is now building a Truetrac for the 2011+ Ram trucks.

 

[Blackbrush]

You have to run heavier lube in these things especially if you tow and are in a warmer climate. It's that simple.

 

[AH64ID]

You have to run heavier lube in these things especially if you tow and are in a warmer climate. It's that simple.

According to who? Not according to the axle manufacturer or Ram/Dodge.

It generally won’t hurt to run heavier, but far from having to.

75w-110 is a great lube for HEAVY towing with these axles.

 

[Blakers]

I think the only reason they run synthetic oil is because they can claim they get a tiny percentage increase in fuel economy which gives them points with the EPA.

 

[Joseph Donnelly]

I still like LE 1605 lube. I run its predecessor, LE 607, in my Ford 9" rear in the race car. Truck rears with floating hubs send the diff lube out the axle tubes to lubricate them. If rust builds up in the tubes, it will go everywhere and kill bearings.

 

[AH64ID]

I think the only reason they run synthetic oil is because they can claim they get a tiny percentage increase in fuel economy which gives them points with the EPA.

Fuel economy isn’t reported on HD trucks, so that likely doesn’t account.

Synthetics do have better hot and cold properties for the same weight thou, and I’d bet that’s why they are utilized.

 

[NIsaacs]

$12 a gallon for my rear diff oil (85/140), change every 30-36k miles. 358k miles on my oem diff seal, still dry.

 

[bcbender]

I ran AMSOIL Synthetic 75/90 with zero issues in my 04.. Might have gone to 75/110 but was not a problem and my old truck was mostly used for towing.

 

[AnonEd]

I remember 25 years ago when at least one vehicle from the Stellantis family had a "tow pack" and all it consisted of was a receiver and synthetic fluid in the rear axle.

 

[Blakers]

$12 a gallon for my rear diff oil (85/140), change every 30-36k miles. 358k miles on my oem diff seal, still dry.

View attachment 126926

Speaking of pinion seal, mine started leaking at around 250,000 miles. I changed it and found it was worn very little, but the steel ring around the rubber seal was rusted through. Put a new one in and it hasn't leaked at all, though it does have a little play at 316,000 miles.