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Sierra Marine trim cylinder kits are designed for use in Mercruiser Alpha Gen II stern drives. These repair kits are for use with the front and rear trim cylinder. For more than 50 years, Sierra Marine has been unmatched in quality and backed by rigorous engineering, testing, and manufacturing standards to produce the best parts in the marine industry. Sierra Marine's commitment to excellence ensures the highest degree of confidence where it counts the most: out on the water. Order the kit for your application needs.
Not Yet Reviewed
$1,063.99
Sierra Marine offers kits to help you rebuild your gear box. Each kit contains the gears you need to get your boat back on the water. Order the model recommended for your watercraft engine application.
Not Yet Reviewed
$1,198.99
Sierra Marine upper gear kits replace old worn gears with renewed performance. Offering an OE fit and function, Sierra's selection includes kits with gears, gears and seals, and kits with gears, seals, gaskets, and bearings to service different applications.
Not Yet Reviewed
$1,155.99
Summit Bucks
Eaton Detroit Truetrac differentials use a patented design of parallel-axis planetary helix gears to provide a quiet, automatic splitting of torque. They perform like a limited-slip differential under normal driving conditions, automatically transferring torque to the wheel with better traction when ground conditions warrant. These replacement units are available for dozens of axle applications.
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$1,013.99
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$1,279.99
On Sale
Yukon Gear & Axle muscle car limited slip and re-gear kits dramatically improve traction and durability by adding a Yukon LSD and an upgraded ring and pinion set to your differential. They also provide an opportunity to generate next-level acceleration by moving to a more aggressive gear ratio. Each kit will include posi-traction unit, ring and pinion gear set, and all required bearings and installation hardware. Select the kit designed for your muscle car.
Not Yet Reviewed
$1,489.99
$1,266.49
On Sale
Yukon Gear & Axle Dura Grip positraction carriers offer great traction and strength, and yet are not overly aggressive for the streets. These nodular iron or steel replacements are 4-spring, Raybestos composite, clutch-style, limited-slip carriers—with internal gears machined from forged 4320 steel with stronger teeth. Assembled in the USA, the Yukon differential carriers are rebuildable, allowing for repairs or modifications without buying a new unit. They're available for fitment with nearly two dozen axle models. What are you using to transfer power? Choose smooth operation with strong lockup abilities to transfer torque—benchmarks of the Yukon Gear & Axle Dura Grip positraction carriers.
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$1,219.99
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$1,719.99
$1,036.99
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$1,461.99
Spidertrax Off-Road's all-new 1480 40 spline front axle stubs are a reinvention of their already proven 35 spline stub shafts. Manufactured from billet 300M aerospace material with an integrated positive locking design—all while achieving 50 degrees of steering—they're the next best thing in stub shaft technology… and the last stub shafts you'll ever need. These 1480 40 spline stub shafts are designed to work with 60 style U-joints and Spidertrax 40 spline Ultimate Unit Bearings. * Aerospace Quality: Spidertrax follows the strictest AMS Aerospace standards for their heat treatment, complete with double tempering, snap tempering, and cryogenic treatment procedures. Parts are sampled to ensure proper grain structure is achieved up to 0.0003 in. from the surface; that's a depth 1/10 the thickness of a human hair! In summary, you're getting the best material and the best heat treatment on the market. * Locked: Turning 40 degrees is impressive, but Spidertrax axle shafts can turn 50 degrees. Engineers achieved this by positively locking the shaft to the Ultimate Unit Bearing with a billet aluminum cap and cap screw. Keeping that stub shaft tightly secured not only helps with driveline vibration, but helps with overall strength of shaft and U-joint. * 40 Splined: Each stub shaft is 40 splined—a size that makes perfect sense, especially when running properly paired inner axle shafts. When sized with the same shaft diameter as inner shafts, stub shafts end up taking the full punishment in your front-end. The stub shaft should be "stronger" than an inner axle because unlike an inner axle, stub shafts have little room to twist, making them more prone to failure. An added bonus: with many drivers running 40 splined rear Ultimate Unit Bearings, having the same unit bearing up front makes for better serviceability and part simplicity.
Not Yet Reviewed
$1,299.00
On Sale
Yukon Gear & Axle offers differential carriers for a wide range of applications. Yukon uses top-quality materials and the latest manufacturing technologies to produce strong, durable carriers that you can depend on for proper traction. These aftermarket units are available in a variety of styles—such as limited-slip, open, Traction-Lok, and locker—for fitment on dozens of axle models and vehicle apps.
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$1,193.99
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$1,362.99
$1,014.89
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$1,158.54
Trail-Gear assembled third members are off-road strong! These units are built with all-new housings and internal parts and are delivered ready for you to drop into your axle. TG assembled third members feature top-quality ring and pinion gears, lockers, solid pinion spacers for long gear life, and they include triple-drilled flanges to cover common driveshaft patterns. The V6 units feature larger OEM-style V6 gear sets with longer pinion gear. Choose your locker style, case style, and gear ratio for off-road performance from Trail-Gear's selection of assembled third members.
( 2 )
$1,375.10
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$1,520.00
What's better than Trail-Gear Rock Assault 9 axle housings? Rock Assault 9 with Trail-Gear's true, full-float, 35-spline axle shafts! These shafts are manufactured from heat-treated 4340 chromoly and feature a tapered design that allows for more yield during extra torque load, letting them flex without breaking. Of course, the Rock Assault 9 axle housings are complete welded assemblies from flange to flange, including the unit bearing pockets and inner housing seals. And now, these strong axle housing include the strength of their axle shafts, making it even easier to upgrade your build. Get ready to rock on with Rock Assault 9 axle housings with shafts.
( 1 )
$1,599.99
Trail-Gear assembled Super Finish third members are made from tool-grade 8620 steel and heat-treated for maximum strength and wear resistance. They include all new parts and are ready to drop into your axle with top-quality Super Finish 29-spline ring and pinion gears, and your choice of locker. The ring and pinion gears are treated with the REM Isotropic Super Finishing (ISF) process, which removes the microscopic peaks in the material and creates a surface on the ring and pinion gears with a roughness of less than 10 µin Ra. This means that there is less friction between the gears, reducing wear by 95 percent, and allowing the gears and bearings to run cooler and last longer. Select the ideal kit for your application. Additional features and benefits: * Fully built Super Finish 3rd members--all new parts--no used housings or internal components * 29-spline pinion spline is 7 percent larger in diameter than the 27-spline for increased strength * Available in 4.88 and 5.29 ratios for 4-cylinder, V6, and high-pinion applications * Gear teeth are cut using Gleason CNC hobbing machines and cutters * No break-in period * Non-directional surface that increases lubricant retention on the gear surface, reducing lubrication requirements * Dust shield pre-installed onto flange * High-pinion sets also include a high-pinion oil slinger * V6 units feature larger OEM-style V6 gear sets with a longer pinion gear * Trail-Safe pinon seal and nut included * Flange is quadruple drilled with popular Pickup/4Runner and Tacoma patterns: -- 66mm x 66mm x 11mm (Tacoma) -- 60mm x 60mm x 10mm (Pickup/4Runner and TG heavy-duty driveline) -- 60mm x 68.3mm x 10mm -- 61.5mm x 70mm x 10mm Notes: * Requires ring and pinion setup kit to complete the installation into your existing differential housing * For Toyota 8 in. solid axles only. Will not fit 7.5 in. IFS front axles.
Not Yet Reviewed
$1,491.02
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$1,492.69
Rock your rig with Trail-Gear Rock Assault 9 axle housings. Tested on some of the most extreme off-road race courses, these axle housings are built to tackle the toughest terrain you can find! They start with 1/4 in. formed shell for the center section, and then attach 1/2 in. face plates. The housings finally connect the DOM axle tubes to the center section with their 3-point attachment system, giving the tubes superior support and engagement into the center section. Inner axle seal and seal housings are also included. Rock Assault 9 rear axle housings are designed for wheel mount surfaces—and are complete with flanges and unit bearing pockets, as well as inner housing seals. The strength you need to climb over anything starts with Trail-Gear!
( 3 )
$1,499.99
A 4x4 and traction go hand-in-hand; however, standard (open) differentials allow each wheel to turn independently to eliminate binding in turns. Off-road, this becomes a problem as engine power takes the path of least resistance—to the wheel with little or no traction. Limited slip differentials offer some improvement, but too often the slipping is not "limited" enough to maintain forward progress. Automatic locking differentials also have disadvantages; noisy when disengaging, they can also upset on-highway driving characteristics. Created to provide traction on demand, without sacrificing highway driving performance, ARB Air Locker differentials employ a 12 V ARB air compressor (sold separately) to pneumatically operate a solid and durable locking mechanism inside the differential. When activated, the Air Locker prevents the differential gears from rotating and the axle shafts from turning independently of each other. With both wheels tied directly to the rotation of the ring gear, the vehicle maintains maximum possible traction at all times. When unlocked, it operates just like a conventional open differential. ARB Air Lockers are available in over 100 configurations for a wide range of vehicles and can be installed in both front and rear axles. Installation should be performed by a qualified differential technician, although no special tools or skills are required, apart from those necessary for fitting a standard differential. ARB also offers three compressor models suitable for Air Locker operation, two of which can be used to inflate tires and operate other equipment. Additional features of ARB Air Lockers include: * Vastly improved traction means less reliance on momentum, reducing the likelihood of vehicle damage * Easy, convenient operation without leaving the comfort and safety of the driver's seat * Ultra durable and extremely strong; only the highest quality materials used in construction * Patented gear technology and 2-piece design ensures optimal locking strength * Forged gears provide superior strength and durability * Incredibly simple, yet effective, design employs minimal moving parts for maximum reliability * Thoroughly tested and proven * Most sold as kits with differential, activation switch, solenoid valve, air line, and bulkhead fittings * Front and rear Air Lockers available for most makes and models * For 4WD and 2WD applications * Easy maintenance; no special additives required * Also offered in ARB Traction Packs that include two Air Lockers, a compressor, and accessories for tire inflation
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$1,299.95
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$1,499.95
On Sale
Yukon Gear and Axle offers an extensive line of general replacement and high performance axles for passenger car, truck and SUV applications. Yukon Gear & Axle 4340 chromoly axles provide up to 50 percent more strength than stock axles … critical for extreme performance applications with large tires, high torque and high horsepower. These 4340 axles are manufactured using the latest technologies and the highest quality materials for long life in off-road, street and track use. Yukon Gear & Axle 4340 chromoly axles are offered in complete kits or individually.
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$1,115.99
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$1,695.99
$1,003.84
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$1,441.59
On Sale
Yukon Gear & Axle ring and pinion gear and installation kit combos are complete packages that include front, rear, or front and rear ring and pinion sets, along with the most complete master overhaul kits on the market—giving you everything needed to re-gear the front and/or rear differentials in one package. Conceived to handle some of the harshest conditions, these combos utilize the latest design and manufacturing technologies to afford you quiet running gear that's strong and easy to set up. The included Yukon master rebuild kits undergo extensive research to ensure a perfect fit and hassle-free install with the very best components. Order the combo designed to fit your application.
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$1,191.99
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$1,538.99
$1,013.19
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$1,308.14
On Sale
Clearance
Yukon Gear & Axle ring and pinion sets are strong but quiet performers. Designed to handle some of the harshest conditions, these sets utilize the latest design and manufacturing technologies to afford you a smooth running gear that's durable and easy to set up. Yukon ring and pinions are available in hundreds of size, ratio, and axle model options. Whether you're on the street, off-road, or at the track, you'll experience unrivaled power and gear performance. Order the model recommended for your application.
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$1,600.99
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$1,867.99
$1,339.50
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$1,587.79
On Sale
USA Standard gear axle shafts are high-quality replacements machined from steel for superior strength and performance. They're available for dozens of differential case design applications, such as AMC, Ford, GM, Chrysler, and Dana. The shafts are offered in nearly a hundred lengths and numerous wheel stud patterns. Order the model recommended for your vehicle.
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$1,285.99
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$1,756.99
$1,112.64
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$1,493.44
On Sale
Need traction? Zip! You've got it with Yukon Gear & Axle Zip lockers! With on-demand traction, these lockers offer an air-operated design that allows you to switch from an open differential to 100 percent lockup when you need it. Theses Yukon Zip lockers are the ultimate in driver selectability for the right traction, on-road and off. Built from forged cases with 4320 chromoly internals for added strength, they work with a variety of air-delivery systems and are assembled in the USA. Do you need gripping power--now? You have the control with Yukon Gear & Axle Zip lockers.
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$1,300.99
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$1,571.99
$1,105.84
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$1,336.19
On Sale
Yukon Gear & Axle Grizzly lockers offer fierce power! These robust lockers are the ultimate mechanical locking differentials, replacing your entire carrier assembly. Yukon Grizzly lockers feature forged cases with 8620 internals and a patent-pending internal locking mechanism for maximum strength. Assembled in the USA, these lockers will provide 100 percent power to both your tires, while still allowing for disengagement while negotiating turns. Whether your application is for the street, off-road, or drag racing, Yukon Gear & Axle Grizzly lockers will have your rig roaring with performance.
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$1,196.99
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$1,297.99
$1,017.44
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$1,103.29
On Sale
USA Standard Gear ring and pinion gear kit packages provide all you need to re-gear your front or rear differentials. They include ring and pinion sets along with master overall kits to fully complete your job. Save time searching for components—and save money by purchasing everything at the same time. Service the front or rear of your rig with a ring and pinion gear kit package from USA Standard Gear.
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$1,217.99
$1,035.29
On Sale
Clearance
Auburn Gear Select-A-Loc differentials maximize your vehicle's traction with on-the-go system engage. These electronically controlled traction-enhancing differentials are selectable lockers offering the traction control of a limited-slip differential and a full-locking differential--all in one! When locker switch is off, the clutch pack activates the limited-slip mode. As torque increases, the separating forces within the differential gears increase, causing the clutch pack to be compressed, in turn providing bias torque to the highest traction wheel. When the locker switch is turned on, electronic current is sent to the electromagnetic coil which locks the axles together. Auburn Gear Select-A-Loc lockers feature a unique cone-clutch design with gearing made from aircraft-quality 9310 heat-treated billet steel for tough-as-nails strength. The lockers operate quietly without any shift fork or pins to line up to change the locker mode. With a limited-slip mode for on/off-road excitement and a true locker mode for the quarter-mile or nasty off-road terrain, Auburn Gear Select-A-Loc differentials deliver superior traction capabilities on the street, at the track, or off-road.
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$1,336.99
$1,203.29
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