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V6 Dakotas
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Deep Purple
*GenIII*
 
2/17/2004
07:54:37
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 Subject: Differential fluid
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When using synthetic gear lube in an LSD , how often should you change the fluid? Thanks for the help.
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Jay Wingate
Dodge Dakota
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2/19/2004
13:02:55
| RE: Differential fluid
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Message:
What brand gear oil are you using?
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jay
Dodge Dakota
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2/19/2004
13:40:06
| RE: Differential fluid
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I just changed mine yesterday. My milelage was about 40,000 and it looked like maple syrup sludge. I will definately start changing it about every 20,000. I used mobil 75w-90 full synthetic.
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mhall02
Dodge Dakota
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2/19/2004
15:09:45
| RE: Differential fluid
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Never changed the stuff in my '78 F-100, bought it from Dad when it was 8 years old (he never had it changed), it was totaled a year ago, no differential problems (over 220,000 miles on it). My father in law had almost 200,000 miles on his 1982 Ram with the original fluid when he sold it. I wouldn't chage it unless you get it contaminated with sand or water or abuse it to no end.
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AmsoilSponsor
DakotaEnthusiast
2/19/2004
22:40:41
|  Amsoil Synthetic 75w-90 Gear Lube
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Deep Purple,
If you ask ten people you will get ten answers.
The easy answer --- refer to your Owners Manual --- but I would like to add the following (perhaps you have seen it on other threads --- I am reposting just in case you have not read it before. For those of you that have read it before --- please bear with me.)
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I am going to quote an old friend from this site ... Sandman ... whom we have not heard from in a while. Hope everything is okay Sandman!
... and I quote: "GM recomends 100,000 to 150,00 mile drain intervals. This is in the 8.625 rear end's equipted with synthetic gear lube from factory. This is under normal conditions. So I will apologise for makeing fun of Amsoil's claim of "life of vechile" drain interval for their new 2000 series gear lube. I figure if that type of drain interval can be aproved by an OEM then that is good enough for me!
---- Sandman
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Personally, I think the "life of vechile" claim is for normal drivers under normal conditions. For 90% of drivers "normal" means never leaving the pavement. The truth is somewhere in between. Off Roading ... Water ... Etc., adjust your interval to where you drive and your driving habits.
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Amsoil Series 2000 Gear Lube is latest introduction from Amsoil offering a higher level of performance vs. Amsoil's regular gear lube. They start with a different base stock with a special additives package. Amsoil could have discontinued the regular gear lube but contine to carry it due to its popularity.
I have Freightliner customers driving Class 8 Tractor Trailor Trucks using 75w-90 synthetic gear lube in their difs. Tuff enough for them ... Tuff enough for me.
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High quality gear oils must lubricate, cool and protect geared systems. They must also carry damaging wear debris away from contact zones and muffle the sound of gear operation. Commonly used in differential gears and standard transmission applications in commercial and passenger vehicles, as well as a variety of industrial machinery, gear oils must offer extreme temperature and pressure protection in order to prevent wear, pitting, spalling, scoring, scuffing and other types of damage that result in equipment failure and downtime. Protection against oxidation, thermal degradation, rust, copper corrosion and foaming is also important.
AMSOIL Series 2000 Synthetic 75W-90 Gear Lube delivers unbeatable protection and fuel economy (independent testing shows class 8 vehicles with AMSOIL Series 2000 Synthetic 75W-90 Gear Lube in the differentials obtained up to 4.83 percent more mpg than vehicles equipped with another popular gear lube). Amsoil Synthetic Gear Lube has the film strength required to deliver all the protection heavy-duty and high-stress applications need in a fuel-saving viscosity grade. AMSOIL Series 2000 Synthetic 75W-90 Gear Lube is recommended for use in all passenger vehicles, commercial trucks and race vehicles.
AMSOIL 75W-90, 80W-90 AND 85W-140 Gear Lubes exceed the lubrication and performance requirements for gear boxes where API MT-1, GL-4 or GL-5 lubricants are specified.
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AMSOIL Slip-Lock Differential Additive
Effectively Eliminates Gear Housing Chatter
When making a turn, the outer wheels of a vehicle must travel faster than the inner wheels. It is up to the differential to act as a balance arm, establishing constant equilibrium of torques and forces between the left-hand and right-hand driven wheels. In standard (or open) differentials, power is directed to the wheel offering the least resistance. This works well when making a turn, but in a situation where one wheel is lifted off the ground, it causes the suspended wheel to turn while the other remains motionless.
Limited-slip (or positraction) and locking differentials are traction-increasing devices. Locking differentials transfer all available torque to both wheels. The teeth of the spider assembly engage with those on the locker clutch, causing both axle shafts to operate as one. Locking differentials don't allow one drive wheel to spin while the other remains stationary. Instead, they keep both wheels in drive mode, but unlock to permit different wheel speeds when turning. The engaging and disengaging of the teeth on automatic locking differentials often causes a banging and clunking sound. Manual locking differentials usually use an electric motor or vacuum diaphragm to engage the locker, reducing this noise.
Limited-slip differentials allow different wheel speeds when turning, but when one wheel loses traction, greater torque is transferred to the wheel offering more resistance. Limited-slip differentials make use of friction between clutch plates, as opposed to the meshing teeth employed by locking differentials. Transferring less torque per side, limited-slip differentials are generally smoother and quieter than locking differentials, but still sometimes "chatter" when transferring torque to the wheel with traction.
In some differential applications, a friction modifier additive is necessary to reduce chatter. AMSOIL Slip-Lock Differential Additive is formulated with advanced friction modifiers and is designed to eliminate gear-housing chatter in cars, trucks and SUVs equipped with limited-slip, positraction and locking differentials. It also reduces the banging and clunking associated with automatic locking differentials.
AMSOIL Slip-Lock Differential Additive is formulated for use with both synthetic and petroleum gear lubricants and safely replaces manufacturer recommended friction modifiers. Its convenient flip-top dispenser provides quick and easy application to the gear housing. One four-ounce bottle of Slip-Lock treats differential capacities of two to four quarts. It is not for use in automatic transmissions or other applications requiring ATF.
NOTE: AMSOIL Synthetic Gear Lubes DO NOT require the use of this additive. However, not all differentials respond the same and if chatter is noticed, the addition of AMSOIL Slip-Lock will eliminate it. For chattering differentials not running AMSOIL Gear Lube, this product is an excellent solution to the problem.
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***** Interested in receiving a FREE Amsoil Catalog, ...
... clink the link at the bottom of this post.
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DIY - Do It Yourself
For those of you thinking of changing your own fluids ...
Helpful Differential Recommendations:
-Flush (drain) as much of the old fluid out.
-Differential fluid capacity depends on ring gear and axle housing size.
-Do not over/under fill differential. This could mean a capacity difference of a quart or more and may cause overheating problems. (See the owner’s manual for proper fill level)
AMSOIL gear oils are formulated with friction modifiers for limited slip differential applications. There is no need to add limited slip or additional additives.
-After changing the differential fluid, drive the vehicle in 7 or 8 figure eight turns, so the new lubricant can work its way into the axle assembly.
Synthetics provide the long-lasting protection, fuel efficiency and dependability needed for top performance, even extreme-pressure conditions. Stays fluid in cold temperatures for easy cold-weather shifting.
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Amsoil Series 2000 75w-90 is excellent for use in passenger cars and trucks requiring a GL-5 gear lube, including those with limited slip differentials.
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Request a FREE Amsoil Catalog by clicking the following link:
__________________________________________________
Steven Roark , Amsoil Dealer , Proud Sponsor of www.DodgeDakotas.com
AMSOIL Synthetic Motor Oils, Lubricants, Filtration, and Truck Care Products
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J and J Auto
GenII
2/19/2004
22:54:58
| RE: Differential fluid
IP: Logged
Message:
I am running the Amsoil 80 90 in my limited slip
with no aditive and have had no problems
Next change I am going to the Amsoil 75w 90 will
help with gas mileage I would think
As Steven said everyone has a diff answer on when
to change the gear oil some never change it and
have over 250,000 miles on the rears with no probs
I like to change mine every 50,000
Trans with universal Amsoil I change every 20 to
25,000 and have had no probs and I am running
about twice the HP through my trans as a normal
V6 would
What Im wouls say is what ever makes you feel
comfortable
And every time you change the fluid also check
your breather vent tube to be sure its not cracked
to alow water to enter and be sure the vent is not
pluged
Larry
J&J Auto
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AmsoilSponsor
DakotaEnthusiast
9/30/2004
13:25:37
| Amsoil Synthetic Severe Gear EP Gear Lube - Amzoil
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Message:
AMSOIL Introduces ---
SEVERE GEAR™ Synthetic Extreme Pressure Gear Lubes
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AMSOIL INC. of Superior, WI has updated its gear lube formulations in order to optimize its gear lubes for modern applications. SEVERE GEAR™ Synthetic Extreme Pressure Gear Lubes, available in 75W-90 and 75W-140 viscosities, are ideally suited for vehicles that experience towing, hauling, steep hill driving, commercial use, racing, off-road use, rapid acceleration, stop and go driving and high ambient temperatures.
Modern vehicles are designed with more horsepower and torque than in years past, allowing them to haul and tow heavier loads. The result is higher gear loading and hotter running differentials. In addition, factors such as increased interior space and lower floor boards push axles higher into the vehicle's body, reducing air flow and increasing heat. The closer proximity of the axles to the exhaust system also effectively raises temps, while more aerodynamic body styles and air dams restrict air flow to the differentials.
SEVERE GEAR™ Synthetic EP Gear Lubes deliver unbeatable power-enhancing protection, thermal stability and fuel economy in both heavy-duty and severe service operations. AMSOIL SEVERE GEAR™ has the film strength required to deliver all the protection high stress applications need in a fuel-saving viscosity grade at a competitive price. Recommended for use in all passenger vehicles, light trucks, SUVs, commercial trucks and race vehicles.
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You can REQUEST A FREE AMSOIL CATALOG by clicking below.
Steven Roark , Amsoil Dealer , Proud Sponsor of www.DodgeDakotas.com
AMSOIL Synthetic Motor Oils, Lubricants, Filtration, and Truck Care Products
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