coobie

My truck turned 15,000 miles this week. I am going to change the front and rear diffs out to amsoil.Also thinking to do the same for the tranny fluid.Any pro or cons on the amsoil products.Thanks for any Info.coobie

Catawba Scott

Although I own only a 1500 4x4, I use Amsoil in everything but the transmission. The reason being is that Chrysler does not have a drain plug for their torque converters, so you wouln't be able to fully drain the transmission. I used my owner's manual to decide which grade of fluid to get and how much. Merry Christmas and Happy New Year to all

eastmentCTD600

I changed my rear diff at approx. 11k to Amsoil 75W-90 (recommended weight from owners manual). I didn't notice any increases in fuel mileage like Amsoil says, but I never believed that anyway.

I will say the stock Chrysler fluid (it's a synthetic) was foamy when I drained the housing (Note: make sure you run the truck hard to warm up the fluid before changing it). The Amsoil does not seem to foam (I ran the truck for a few miles and checked the level after the fluid change - no foam W/ Amsoil).

Good luck!

chrismez

The only prob I heard is about voiding the warranty.....I took my truck to the dealer. Service guy saw my Edge, air intake and 4 inch exhaust and said no prob with warranty with the mods. I don't see why you have to change the oil in the differentials, especially at 30k. Most vehs require a change at 100k. Anyone know why we have to change the differentail oil so fast?????

surlynkid

100K? wow. i have two rock crawlers and i never go more than a year. i am in a warm climate, so i use 85W-140, but i still do it every year. 30K is smart. you are talking about a small cost versus a new third. all you need is a drain pan, some rtv, and some new fluid. i prefer the amsoil products. i use them for everything but the motor.

Chip

I use Amsoil in everything ! I've found out that everything runs somewhat cooler. To answer chrismez's question about changing the diff oil; from the factory, the new gears will have very small burs on them, when the gears start meshing, the burs will wear off and become small particle in your oil. I wouldn't want to run my gears with small particles in the oil, that is not very good for the close tolerances the gears have to turn, so, it's a good idea to change the diff oil every 30k miles. It's better to be safe than sorry, especially with the investment and expense of these trucks !
Chip

Lurch519

I have run Amsoil in my truck from almost the beginniing ( bought the truck with 21,000 miles on her ) and I think they do help the truck run cooler and perjaps get better mileage. I get 19 to 21 mpg on the open road and not nearly as good in town dodging stoplights. I'm going to the 85-140 gear lube in the rear diff this spring, though. The maghytec covers are a real blessing .

rossn2

Changed everything underneath at 7k miles. Frt & Rear end got Amsoil Series 2000 75w-90. Transfer case Amsoil ATF and 6 speed to Redline MTL.

You can save money by using the AMSOIL 75w-90 gear oil instead of the Series 2000 75w-90. I don't have the book on my right now to state the Product Codes.

Some people have been experiencing a grinding/slipping type noise in the rear end, when starting from a stop and making a left turn after switching to the Amsoil. They have drained it out and replaced with, I think, Valvoline Synthetic. Do a search on the forum here...

surlynkid

slipping with a LSD? if so, you need a specific amsoil to allow the LSD to work properly. that could be the problem.

rossn2

Hm, the new generation Dodge uses AAM gears/axles. The AAM does not have clutch plates as a normal LSD does, it operates completely differently. To include, "apply the emergency brake slightly to make the other wheel/axle engage." I fyou want a normal LSD in your 05 your trying to find, you have to order it special.

Lightman

I think the amsoil gear lube stinks. I used it from 15-30k and had the gear noise/chatter around turns etc. Several people have had it. The case was also pretty dirty as well. I have since switched to Mobil 1 75w90 and the noise/chatter was gone right away. Combining the fact that the m1 is easily available everywhere, it's also API certified and should have have any warranty issue, you are in compliance - if that means anything to ya. I'd steer clear of the amsoil coob, try m1 or redline.

Some people get completely sucked in by amsoil's marketing , and really believe ALL of their products are spectacular. I pick and choose. I like their 4stroke/atv 0w40 oil. I also like the 15w40 HDD oil. In any case, I think mobil makes a better 5w40(delvac 1) than amsoil does so I use that - and mobil's gear lube.

alltork

Running amsoil 75w90 with 4.10s and lsd no noise, no chatter. I'm turning 37 inch tires .

bulabula

I've been running Amsoil 75W-90 with no issues either, and will put it back in at the next lube change too.

Quite frankly, Lightman isn't incorrect either: My nose sez all gear lube "stinks", even the syn stuff.

coobie, if you're under the truck doing all this, go ahead and buy 3 quarts of fluid for the transfer case too.

Lightman

I would love to have said I used the amsoil with no probs. So many people have had probs though, and I didn't really even notice the noise till I started paying attention. In any case, for the record with stinkyness The m1 diff lube has almost zero smell. I will say the amsoil stuff is really pungent!

bulabula

As far as noise/chattering of the rear diff goes, I like to know that it in fact is working.

On one extreme you have lockers, where there's no noise/chatter from the diff - but you do have the noise/chatter from the tires skidding during a turn. You know for a fact that the diff is solid.

On the other end of the spectrum, you have open diffs, where there is no noise, no chattering, and "no" traction. Going around a turn is turbine smooth.

My truck does have some chattering once in a while during tight turns - and I've attributed that to a limited slip that is working as it should. Its not locked like a locker, but not slipping like an open. I've driven both 2nd and 3rd gen trucks that did this.

So that leads me to think that if you're experiencing a totally smooth/quiet diff during a turn, that Limited slip you have is more likely to be slipping, than engaging.

Bottom line is that I want my truck's rear LS Diff to be tighter, rather than slippier.

The only problem I've ever had with Amsoil is that a gallon jug broke in transit. It was replaced free of charge; but I never had an opportunity to find out from those other folks whose packages were douched with that nice smelling syn oil.