We offer a complete line of heavy duty 10 and 18 wheeler truck drivetrain components including center bearings designed to last. American made differential axles and Professional Bearing Gasket Seal kits for overhauling large heavy duty transmissions.

Heavy Duty Center Bearings	Heavy Duty Axles	Heavy Duty Manual Transmission Bearing Overhaul Kits
Eaton No Spin Heavy Duty Trucks, Tractors & Forklifts

There are many designs of Differentials including:

Conventional differential uses two side gears inside the differential case. Each gear is splinted to accept an axle shaft. These side gears are in turn driven by a set of spider gears. The spider gears, also inside the differential case, ride on a shaft which is pinned into the differential case and through which all the power is transmitted. The case is driven by the ring gear that is bolted fast to the case. The conventional differential is fitted as standard equipment on most vehicles.

On paved roads this system is very successful, giving predictable handling, even tire wear and requiring very little maintenance. However, in off road situations where traction surfaces vary greatly, this type of differential has a major limitation. When one wheel has greater traction than the other, all the power will be directed to the wheel with the least traction.

Limited slip differentials (LSD's) come in a variety of designs. Most use friction plates, cones and/or gears to reduce slippage between each of the tires. these units have a dual power path from the differential case to the axle shafts.  Some power is transmitted through the spider gears to the side gears in the conventional manner. The remainder is transmitted by friction between the differential case and the clutch plates and the side gears.

Automatic locking differentials transmit power to each wheel through a pair of dog clutches. Differential action, such as when cornering is provided by automatically disengaging the appropriate clutch when one wheel rotates faster than the other. This results in differential action, that occurs in ratcheting stages rather than being smooth and progressive. Power received by the differential is automatically directed to the wheel with greater traction. 

Manually lockable differentials use a conventional differential in conjunction with a mechanical locking device that can be operated at the driver's discretion. when locked, both axles will then turn at the same speed irrespective of the road surface.  When it is unlocked, the differential functions as a conventional differential giving predictable handling, long service life and no increase in tire wear.

The Electric or Air Locker unit incorporates its activating mechanism totally inside the differential center. This avoids the need to have complicated piston arrangements hanging off the axle housing. Locking action is controlled by the drive with a push button switch inside the cab.

Select any of the following links to see detailed information on the featured positractions that we supply and design and application guide for your vehicle:

Eaton	Eaton	Eaton	Eaton
Eaton No Spin HD	Auburn Limited Slip	Auburn Electric Locker	TRD Toyota Positraction
GM FWD Positraction	Powertrax LockRight	Powertrax no-Slip
	Air Locker Front & Rear	Yukon Duragrip Positraction Unit
	We also supply: Detroit Lockers, Dana Track Locks, Dana Power Locks, Information on these Lockers can be found on individual rear end pages		Differentials what the difference?

Save fuel by optimizing differential ratio to your specific vehicle application!  If you have changed tire diameter optimize your vehicles power by changing differential ratio. Gain back the lost power!  Free Tech Support!  Considering purchasing parts and have questions call toll free 1-800-216-1632 and talk to an experienced technician.

We feature Ring Gear and pinion sets, for General Motors, Chevrolet, Ford, Chrysler and Toyota. We are a Dana Distributor and supply genuine DANA-Spicer ring and pinions, and differential parts from only the highest quality aftermarket manufactures. We can supply ring and pinion and differential parts for: American axle, AMC Model 20, C-5 Corvette, Dana 30, Dana 44, Dana 50, Dana 60, Dana 70, Dana 80, Chrysler 7.25", Chrysler 8.25", Chrysler 9.25", Ford 7.5", Ford 8", Ford 8.8", Ford 9", Ford 10.25 and Ford 10.5 . Parts are available for the following General Motors Differentials: GM 7.5", GM 7.625", GM 8.20", GM 8.5" 10 bolt, GM BOP, GM 8.875" 12 Bolt, GM 9.5" and GM 10.5" 14 Bolt. We can also provide differntial parts for Toyota 7.5" and Toyota 8" . Dodge 8.25" and 9.25" ring and pinions are provided. Don't see what you need just give us a call.

Posi-traction units by Eaton, Tru Trac, Powertrax , Detroit Locker, Air Locker, and Auburn Gear as well as factory units and repair parts. Complete third member assemblies as well as locking and limited slip differentials are available. We also offer axles, open and posi carriers, spools, wheel bearings, gaskets, seals and spider gear internal kits for complete installations along with top quality bearing/overhaul kits, driveshafts, yokes, u-joints, u-bolt & strap kits and other differential parts.

Below you will find links to various manufactures differential application guides and parts list. You will also find links to our popular custom differential assemblies, gear ratio verses tire diameter information. A Link for set up procedure for differentials. Installation instructions are provided, order your ring and pinion kits from drivetrain.com and receive direct access with technician to assist you with setup procedures, links to various positraction units and other technical information to assist you is also provide.

Thinking about changing tire size we can help, consult our Look up chart for determination of engine RPM, gear ratio and tire size combination. Larger tires on lifted truck suffer from loss of power, changing the ring gear and pinion to a lower ratio is the answer.

We have a large stock of high quality differential components:

Select a vehicle manufacture or differential category below to find your specific application:

AMC 20 Ring Gear and Pinion Sets

American Axle OE Ring and Pinions

Chrysler Ring Gear and Pinion Applications (see housing gasket pattern to assit you in identification)

Dana/Spicer Ring Gear and Pinion Applications  

Ford Ring gear and Pinion Applications (see housing gasket pattern to assit you in identification)

General Motors Ring gear and Pinion Applications (see housing gasket pattern to assit you in identification)

Installation instruction sheet for Ring and Pinion gear installation.

Spanish installation instruction sheet for Ring and Pinion gear installation.

Positraction units

Positraction differentials ensure maximum traction under adverse conditions, they are designed to keep both wheels in a constant drive mode, with the ability to automatically "unlock" to permit necessary wheel speed differentiation. It also eliminates individual wheel spin for better traction and less tire wear.

See our new 12 Bolt Car conversion for GM 10 Bolt 8.5" muscle cars.

Chrysler Dodge Dana Differential Gasket Shapes

Back to Chrysler Dodge Ring and Pinion Ratio

Chevrolet General Motors Dana Differential Gasket Shapes

Back to Chevrolet GMC Ring and Pinion Ratio

Ford Motor Company Dana Differential Gasket Shapes

Back to Ford Ring and Pinion Ratio

Towing your vehicle behind a motor home has now become very common and most motor home owners report that towing a car has little or no effecton handling and mileage. Yet many questions remain about towing with all four wheels on the ground verses using a 2 wheel dolly. Owners agree that towing with four wheelsdown is the safest way to tow.

Rebuilt Replacement Transfer Cases for Chevrolet, Dodge, Ford, Jeep and most Imports are also available!  Below you can find a detailed list of transfer cases by vehicle model that we supply overhaul kits and repair parts for, following these link will provide detailed list of parts for your transfer case.

Rebuilt Re-manufactured Transfer Cases

Factory built and test, our Transfer Case Units unlike many lower quality rebuild transfer cases, these units are re manufactured Transfer Cases that we offer have been thoroughly tested from the smallest piece to the completed assembly. Low service expectancy parts are automatically replaced regardless of their condition. All other parts that do not have absolutely new potential service life are replaced with the highest quality parts available. Improvements (upgrades) are performed to improve on the manufacturer's design when possible. But these procedures alone will not guarantee you the highest quality transfer case. It is the experience of the crafts people with their knowledge, dedication and uncompromising desire to improve that makes our remanufactured transfer cases the standard of quality in the industry. No hassle warranty.

Is someone offering to rebuild your existing transfer case wondering what the difference is between rebuilt unit and re manufactured unit?  The person offering the rebuild service gives you a price typically without opening up your transfer case. He is betting that he can fix the unit with minimum expense for parts and get you on your way without a warranty!  Re manufactured units have more new parts and come with a 12 month warranty. Another thing to consider is that it takes less mechanical skills to remove and replace a complete unit than it does to rebuild a unit if you are considering doing the job yourself also less time. If you have good mechanical skill and time rebuilding your existing unit is recommended.  Professional bearing rebuild kits plus hard parts are available. 

So the next time you need a transfer case remember - all transfer cases are not the same - you can never make a bad decision by choosing the best.

Transfer Case Replacement Units (Remanufactued)

We provide professional quality transfer case parts and rebuild parts kits that are designed to be top of the line overhaul and transfer case repair kits. We have included information on how to identify individual transfer cases by, application information, model year, and detailed kit and part availability by transfer case type. In most cases we also provide a free-detailed parts illustration to assist you with part identification and re-assembly.  To have your transfer cases last longer be sure to balance both front and rear drive shafts when installing new transfer case.

AM General Hummer	Ford	Isuzu		Providing your assembly number will ensure that you receive a direct drop in replacement.
Buick	Aerostar	Hombre
Cadillac	Bronco	Oasis
Chevrolet	Bronco II	Rodeo	Mazda
Astro	Excursion	Trooper	B2300
Blazer	Expedition	Trooper LS	B3000
K Series 1500	Explorer	Trooper LTD	B4000
K Series 2500	F-100/150	Trooper S	Navajo
K Series 3500	F-250		Mercury Mountaineer
S10 Blazer	F-350	Jeep	Mitsubishi
S10 Pickup	Ranger	Cherokee	Mighty
TrailBlazer	GEO	CJ5	Montero
Silverado	GMC	CJ7	Stealth - 3000GT
Suburban 1500/2500	GMC Envoy	Comanche	Eclipse & Talon
Tahoe	GMC Jimmy	Grand Cherokee	Nissan Pickup	Transfer Encoder Motors are sold separately.
V Series	GMC K Series 1500	Grand Wagoneer	Oldsmobile Bravada	Transfer Case Encoder Motors Chevrolet, GMC , Dodge, Ford, Jeep & Imports.
Dodge	GMC K Series 25000	J10, J20	Plymouth Trailduster
Colt Vista	GMC K Series 3500	Scrambler	Toyota
D Series	GMC S15 Jimmy	Wagoneer	4 Runner
Dakota	GMC Safari	Wrangler	Pickup
Durango	GMC Sierra		T100
RAM 1500	GMC Sonoma	Kia Sportage	Tacoma
RAM 2500	GMC Syclone, Typhoon		Landcruiser
RAM 3500	V Series	Lincoln Navigator
Ramcharger	Yukon
W Series

Transfer Case Overhaul Kits and Hard Parts

Below find listed are model numbers for individual transfer cases, following these links will provide detailed application specific quality transfer case parts and rebuild parts kits are designed to be top of the line overhaul and transfer case repair kits. We have included information on how to identify individual transfer cases by, application information, model year, and detailed kit and part availablity by transfer case type. Select your transfer case model number from the following list and see detailed parts that are avaialble.

Here you will find links to the parts we supply by vehicle type. Locate your vehicle make below and you will see all of the featured products we offer. Plus application data, information and pricing.

Chevrolet GMC	Ford	Dodge
Jeep	H2 Hummer	FJ
2007-2011 Wrangler JK