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General Dakota Board
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marvin
Dodge Dakota
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9/21/2004
18:31:53
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 Subject: synthetic oil in differential
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Hi guys, I've got synthetic oil in the differential of my 01 quad.
How many miles between fluid changes ??
Thanks for any help.
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.boB
Dodge Dakota
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9/21/2004
21:42:44
| RE: synthetic oil in differential
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The book says 24K miles with standard fluid. I'v never seen anything one way or the other about synthetic gear oil. Due to a lack of data, I change mine every 24K miles, and I use Mobile 1.
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Dr. D
Dodge Dakota
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9/22/2004
08:11:37
| RE: synthetic oil in differential
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I change the fluid in my limited slip (anti-spin) rear axle at least
every 50,000 miles. If you do a lot of heavy off-roading you may
want to change more often (new lube is cheaper than new parts).
LSD's have a tendancy to push a fluid to its limits due to the
constant functioning of the internal parts of the LSD itself.
I have never had any problem with any of my limited slips and I
have been using nothing but AMSOIL since 1994.
Dr. D
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AmsoilSponsor
DakotaEnthusiast
9/22/2004
08:31:44
|  Amsoil Synthetic Oil or Gear Lube in Differential
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Thanks Dr. D. for the intro to Amsoil Gear Lubes.
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FYI - Gear Lube Information:
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.
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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's latest (and best) Gear Lube, Series 2000
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AMSOIL Series 2000 Synthetic 75W-90 Gear Lube delivers unbeatable protection and fuel economy. It has the film strength required to deliver all the protection heavy-duty and high-stress applications need in a fuel-saving viscosity grade. Recommended for use in all passenger vehicles, commercial trucks and race vehicles. Product Code: TGR
APPLICATIONS
AMSOIL Series 2000 Synthetic Gear Lube is Recommended
for Applications Requiring the Following Specifications:
API MT-1, GL-2 THROUGH GL-5
MIL-PRF-2105E
MACK GO-J, GO-J PLUS
CHRYSLER MS-9070
GM 12346190
FORD M2C-201-A
ROCKWELL 0-76-E
EATON PS-037A, PS-109
AMSOIL Series 2000 Synthetic Gear Lube provides limited slip performance. Although generally not necessary, original equipment manufacturers' limited slip additives may be used in conjunction with AMSOIL Series 2000 Synthetic Gear Lube.
NOTE: Most vehicle manufacturers recommend driving a vehicle in tight figure "8" patterns eight to ten times after changing limited slip lubricants.
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I am going to quote an old friend from this site ... 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 apoligise 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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Amsoil Series 2000 Gear Lube
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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Additives ???
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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DIY Helpful Information
For those of you thinking of changing your own fluids (DIY) ...
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.
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Synthetics provide the long-lasting protection, fuel efficiency and dependability needed for top performance, even extreme-pressure conditions. Synthetics stay fluid in cold temperatures for easy cold-weather shifting.
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To request a FREE Amsoil Catalog, clink the link 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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AmsoilSponsor
DakotaEnthusiast
9/22/2004
08:58:54
| Amsoil Synthetic Gear Lube - Amsoil Hand Pump
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Message:
For the DIY'er ...
The new AMSOIL Hand Pump was designed to make it easier to dispense lubes in awkward, hard to install applications. Specifically designed to fit AMSOIL quart, gallon and Twin Pack bottles, the AMSOIL Hand Pump guarantees efficient, quick dispensing of AMSOIL gear oils, transmission fluids and any oil that may need to be pumped. A larger pump and thicker hose make it possible for the AMSOIL Hand Pump to pump one ounce of fluid per stroke versus the 1/4 ounce per stroke of standard pumps. This four-fold improvement in pump efficiency saves you time and hassle.
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The AMSOIL Hand Pump's versatility also makes it well suited to many automotive and marine applications, including fluid fills in differentials, transmissions, transaxles, boat lower units and boat sterndrives.
With the AMSOIL Hand Pump you no longer need to transfer your fluid to another bottle in order to dispense it, saving time and eliminating the possibility of contaminating your fluid.
The AMSOIL Hand Pump kit includes all necessary hardware such as the hose, hose clamps, a cone applicator for boat lower unit fills, 3 pick-up tubes (one for each AMSOIL bottle size) and a hose retainer clip to eliminate hose dangling and oil messes.
High quality and high efficiency make the NEW AMSOIL Hand Pump a nice compliment to the entire AMSOIL product line.
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To request a FREE Amsoil Catalog, clink the link 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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