Performance Transmission & Drivetrain at Summit Racing

ReadyLift Suspension High Performance CV Axle Kits

Stock CV axles can fall short on durability and performance under demanding conditions, and ReadyLift analysis shows that factory axles often experience premature wear due to increased stress at steeper angles, limiting performance on lifted configurations. ReadyLift Suspension high performance CV axle kits address these issues with axles purpose-built for the lifted truck life, offering more strength and reliability at an affordable price. But whether your truck is moderately leveled or lifted to the extreme, you can rest assured these ReadyLift CV axle kits are up to the challenge. Elevate your vehicle's performance with ReadyLift CV axle kits. Features and benefits: * Enhanced shaft strength: -- Increased diameter for better resistance to twisting and bending under heavy-load conditions, especially during off-road driving * Advanced CV joint design: -- Replaces the factory tripodal joint with a true CV axle joint, providing smoother articulation and improved energy transfer, reducing wear even at extreme angles * Premium boots and seals: -- High-quality, TRD-inspired boots, clamps, and dust seals keep out dirt and moisture, extending the axle's life and reliability in rugged environments

Not Yet Reviewed

$479.95

RT Off-Road Slip Yoke Eliminators

RT Off-Road slip yoke eliminator kits will keep your vehicles moving in the right direction. These kits include the necessary parts to convert the 231 transfer case to a rear fixed-style yoke, which not only provides great strength, but extends driveshaft length approximately 4 in., while reducing the angle. RT Off-Road provides a CV-style yoke, knowing that this style of driveshaft eliminates driveline vibrations and extends life. A properly lifted Jeep with the right aftermarket parts can explore all types of terrain. Keep from screaming for your life with RT Off-Road slip yoke eliminators.

4.25 out of 5 stars ( 4 )

$223.99

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$551.99

ATS Diesel Performance Stage 6 Automatic Transmission Rebuild Kits

ATS Diesel Performance Stage 6 automatic transmission rebuild kits are designed to give that old worn-out transmission a face lift and put the power to the ground! ATS Diesel takes the potent Allison 1000 platform and bulletproofs it with the parts you need in these Stage 6 rebuild kits to give you the edge over the track, towing a trailer or the competition. Stage 6 kit features: * Includes Triplelok torque converter * Pump calibration kit * ATS C1-C5 clutches * Valve body calibration (A and B trim valves) * Handles street/strip, sled-pulling, up to 1000rwhp and can still be daily driven * Co-pilot should be added to this kit (not included) to increase hydraulic torque capacity ATS manufactured C1, C2, C3, C4 and C5 clutch packs include: * C1 includes: ATS exclusive 16 single-sided friction plates with HD pressure plate * C2 includes: Eight friction plates and eight laser-cut steel plates with step ground pressure plate * C3 includes: Five ATS exclusive full friction plates and laser-cut steel plates with micro ground pressure plate * C4 includes: Six frictions and five laser-cut steels * C5 includes: Six frictions and five laser-cut steels

Not Yet Reviewed

$3,564.99

ATS Diesel Performance Stage 7 Automatic Transmission Rebuild Kits

ATS Diesel Performance Stage 7 automatic transmission rebuild kits are designed to give that old worn-out transmission a face lift and put the power to the ground! ATS Diesel takes the potent Allison 1000 platform and bulletproofs it with the parts you need in these Stage 7 rebuild kits to give you the edge over the track, towing a trailer or the competition. Stage 7 kit features: * Includes Triplelok torque converter * ATS pump kit * ATS C1-C5 clutches * Valve body calibration (A and B trim valves) * ATS Co-pilot transmission controller * Increased towing capability, power holding to 1000+ hp * Best for mild street/strip and sled pulling use ATS manufactured C1, C2, C3, C4 and C5 clutch packs include: * C1 include: ATS exclusive 16 single-sided friction plates with HD pressure plate * C2 includes: Eight friction plates and eight laser-cut steel plates with step ground pressure plate * C3 includes: Five ATS exclusive full friction plates and laser-cut steel plates with micro ground pressure plate * C4 includes: Six frictions and five laser-cut steels * C5 includes: Six frictions and five laser-cut steels Note: Deep transmission pan required for Co-Pilot install.

Not Yet Reviewed

$4,654.99

BDS Suspension Transfer Case Drop Kits

Maintain proper driveline angles on your truck, SUV, or Jeep by installing a BDS transfer case drop kit. These new kits utilize one-piece, heavy-duty steel brackets or tube spacers, E-coated for durability and corrosion resistance, to drop the T-case to reposition the output shaft on lifted applications. The transfer case drop kit is sometimes required if you experience a slight driveline vibration. Choose the kit designed for your vehicle.

Not Yet Reviewed

$20.95

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$38.95

ACT Heavy-Duty Twin Disc Street Clutch Kits

Transfer power into motion with ACT heavy-duty twin disc street clutch kits. Available for street and race use, these clutch kits feature twice the number of disc surfaces for better wear, heat capacity, and long life compared to single disc kits. They offer a proprietary Positive Lift Floater System design, which results in quiet operation with no floater rattle and no posts to wear. Maximize your street and track performance with the solid quality and exceptional value of ACT heavy-duty twin disc street clutch kits. More product features include: * Exclusive 4-stage, heat-treating process performed on all diaphragms * Ability to adjust for disc wear and provide equal disengagement * 6-pad rigid race discs are made with high-quality, ceramic friction materials for quicker shifts and trouble-free service * Performance street rigid-hub discs feature premium organic materials with high copper content for better heat transfer, and steel-backed lining for greater burst strength plus durability

5.0 out of 5 stars ( 3 )

$1,330.00

Rough Country Slip Yoke Eliminator Kits

Once you have lifted your Jeep and installed bigger tires on it, the stress on the slip yoke or rear output shaft is often too much. Rough Country slip yoke eliminator kits contain everything to modify your transfer case. They will convert it from a slip yoke to a fixed yoke for improved off-road durability and performance. These kits do require Rough Country's extended travel drive shaft, which helps to prevent driveline vibration and the rear output shaft from breaking. Kit contents: * 1 3/8 in.-32 spline rear output shaft * 356 T-6 heat-treated aluminum alloy tailhousing * 1310 CV yoke * Bearings * Hardware

1.0 out of 5 stars ( 1 )

$279.92

Clearance

ACT Xtreme Twin-Disc Clutch Kits

Transfer power into motion with ACT Xtreme twin-disc clutch kits. Available for street and race use, these clutch kits feature twice the number of disc surfaces for better wear, heat capacity, and long life compared to single disc kits. They offer a proprietary Positive Lift Floater System design, which results in quiet operation with no floater rattle and no posts to wear. Maximize your street and track performance with the solid quality and exceptional value of ACT Xtreme twin-disc clutch kits. More product features include: * CNC-machined and dynamically balanced flywheel ensures trouble-free installation and operation * 40 to 120 percent pressure plate clamp load increase * Pedal feel is stiff to moderate * Recommended disc: Street/Race

Not Yet Reviewed

$1,562.00

$1,169.50

Rugged Ridge Transfer Case Mega Slip Yoke Eliminator Kits

These Rugged Ridge transfer case Mega slip yoke eliminator kits are designed to be used in the same lift applications as the other standard SYE kits. The main advantage to these kits is that they allow for a much longer driveshaft to be used--an additional 3 in. This reduces driveshaft angle, improves bearing and U-joint life, and reduces driveline vibrations. They also have a shorter and stronger main shaft design with improved oiling. They will not work with cable-driven speedometers and are not for use on Rubicon models.

Not Yet Reviewed

$599.99

Rugged Ridge Transfer Case Slip Yoke Eliminator Kits

These transfer case slip yoke eliminator kits from Rugged Ridge are a must if you have installed a 2 in. or taller suspension in your 1987-2006 Jeep Wrangler. The kits' purpose is to replace the slip yoke portion of the NP231 transfer case with a fixed yoke to allow for the use of a CV-style driveshaft assembly. These slip yoke eliminator kits eliminate the need to drop the transfer case in order to avoid the drivetrain vibrations caused by taller suspension lifts. The components in these kits include a reinforced aluminum housing and improved oiling channels, making them the most complete and strongest kits available for your Jeep.

Not Yet Reviewed

$399.99

On Sale

B&M Heavy-Duty Transfer Case Shift Cable Conversion Kits

B&M heavy-duty transfer case shift cable conversion kits replace the failure-prone Z-linkage with zinc-plated steel ends and a bigger (.425 in.) cable to provide solid, long-lasting transfer case gear selection. The 48 in. long cable is an excellent option for lifted builds and the powdercoated brackets will provide years of trouble-free shifts. The cable is compatible with the factory shifter but complements any aftermarket shifter designed to use a factory cable. Features: * Replaces the stock Jeep TJ cable and plastic ends for reliable, positive shifts * Heavy-duty .425-inch cable and 6061 aluminum ends provide a trouble-free, performance upgrade * Perfect solution for Jeeps with suspension and or body lifts * Compatible with factory shift lever for budget friendly replacement * Heavy-duty powdercoated brackets provide excellent resistance to the elements

4.54 out of 5 stars ( 13 )

$179.95

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$186.95

$161.95

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$168.25

Alloy USA Axle Lock Kits

Alloy USA axle lock kits affords 4WD when you need it. Your OE vacuum disconnect systems are prone to failure. These permanent replacements allow you to manually engage the front axle from inside the cab. A simple pull of the cable ensures that you will have 4WD for as long as the transfer case is engaged. Always have a backup plan with Alloy USA axle lock kits.

3.82 out of 5 stars ( 28 )

$231.99

Low Range Off-Road CV Boot Kits

If your factory CV boots are cracked, torn, or worn out, replace them with Low Range Off-Road CV boot kits before the damage spreads to your CV joints. These CV boot kits offer enhanced durability and flexibility compared to standard OEM boots, making them particularly beneficial for lifted off-road vehicles. The kits are designed to protect the constant velocity (CV) joints from contaminants and wear, especially when the axle operates at steeper angles. Constructed from high-quality neoprene or similar robust materials, these aftermarket boots are more resistant to abrasion, drying, and tearing than many standard factory-style rubber boots. This is crucial for protecting the CV joint from mud, water, sand, and other debris encountered while off-roading. These CV boot kits include a pair of OEM-style neoprene inner boots, along with appropriate CV-Joint clamps, axle C-clips, and necessary components for installation. Select the CV boot kit designed for your year, make, and model vehicle. Important Notes: CV-Joint clamp crimp pliers are required to install CV clamps. If you do not have crimp pliers, it is recommended to select kit with crimp pliers. Additional grease may be needed for Long Travel boots.

Not Yet Reviewed

$54.15

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$111.09

On Sale

Artec Industries JK APEX Front Axle Ultimate Armor Kits

Artec Industries JK APEX front axle ultimate armor kits furnish everything you need to make your axle the strongest it can be. These packages include an APEX front axle truss, heavy-duty front LCA brackets, heavy-duty shock brackets, inner C-gussets, and APEX heavy-duty tracbar bracket. Armor kits are available for a variety of specific Jeep applications, in both stock and raised track bar height models. How is the ultimate armor kit better than the regular armor kit? This kit includes entire replacement LCA brackets and shock brackets, whereas the regular armor kit just adds a skid plate to the factory LCA brackets. Product details: * Patent pending APEX truss peaked top design provides more rigidity than a flat top truss design * Truss is CNC precision laser-cut in-house from 1/8 in. mild steel for a lightweight yet strong solution—only 7 lbs. * Truss is CNC precision-bent in-house for a great fitment; literally drop the truss in place on the axle and it's ready to weld—no puzzle piece assembling * Designed using 3-D models directly from Dana Corp and Jeep for an amazing fit and clearances with surrounding components * 70 percent less welding needed than previous truss designs means less warping, faster turnaround, and lower costs * All long seams are bent so you don't need to spend time welding them together * APEX design continues under the OEM coil buckets for complete end-to-end axle reinforcement—an industry first * Dimpled holes provide weight reduction, rigidity, and strength * Contours to the cast steel differential and can be welded with normal MIG welder and moderate pre-heating and post-heating * Provides worry-free wheeling of up to 37 in. tires on stock JK axles * Truss strengthens the weakest sections of the axle—under the coil perches, around the control arm brackets, and where the tube enters the casting * Low-profile design doesn't go over differential and allows usage in vehicles with only slight lift * Front LCA brackets, shock brackets, inner C-gussets, and HD tracbar brackets are made from 1/4 in. steel * Gussets and brackets strengthen or replace weak components of the axle that are prone to failure

Not Yet Reviewed

$439.99

$351.99

Trail-Gear Heavy-Duty Driveline Kits

Trail-Gear heavy-duty driveline kits will move you! The splines are 42 percent larger, and the spline section is nylon-coated to prolong many years of use on the trail. These kits come with a heavy-duty U-joint installed and full circle retaining rings to securely hold the U-joint in place. Whether you're on the track or trails, get things in motion with Trail-Gear heavy-duty driveline kits.

3.5 out of 5 stars ( 2 )

$399.99

TeraFlex Jeep JK Wrangler Rzeppa High-Angle Factory Replacement CV Joints

TeraFlex JK Wrangler Rzeppa high-angle factory replacement CV joints replace your worn or damaged factory units without needing to purchase expensive aftermarket U-joint upgrades. These high-angle models reduce boot failure common with 3 in. or higher lifts. TeraFlex includes low-friction grease engineered specifically for the high-rpm needs of the Rzeppa CV joint and features high-viscosity surface bonding characteristics necessary to properly adhere the grease to all moving surfaces. TeraFlex Rzeppa high-angle CV joint kits include: * CV joint assembly * High-angle CV housing cap and boot * Bolt flanges * Socket head bolts * 6mm Allen wrench * Low-friction CV grease

4.63 out of 5 stars ( 16 )

$184.99

RT Off-Road Mechanical Axle Engagement Systems

RT Off-Road mechanical axle engagement systems replace the vacuum actuator with a cable operated actuator that puts the driver in control of the engagement from inside the cab. The axle engagement is much more reliable since it is directly controlled with the cable. Kits are available for Jeeps with a lift kit up to 3 in., and for lifted applications 3 in. or higher.

3.67 out of 5 stars ( 6 )

$133.99

BDS Suspension Transfer Case Indexing Rings

Prevent front driveline issues on your lifted truck with the BDS transfer case indexing ring kits. At 6 in. of lift and above it is necessary to index the transfer case to allow the front driveline to reconnect and eliminate vibrations. BDS T-case index ring kits have optimal spline engagement and are dual-drilled to allow positioning for compatibility with a range of lift heights. Rounding out each kit is a billet aluminum driveshaft spacer and all the hardware needed to complete the installation. Key features: * Indexing rings eliminate front driveline vibrations * Proper clearance prevents cross-member interference * Heavy-duty steel construction for maximum strength * Designed with optimal spline engagement to prevent transmission to transfer case damage

5.0 out of 5 stars ( 1 )

$193.95

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$568.95

Longfield Driveline Spacers

Driveline too short after lifting your truck? Then you need one of these Longfield driveline spacers. Made from strong 6061-T6 billet aluminum and coated with a black anodized finish, these are extremely tough spacers. They are also quad-drilled for four popular Toyota driveline bolt patterns, making for an easy solution. Adjust your driveline and get back on the trail with Longfield driveline spacers.

5.0 out of 5 stars ( 2 )

$57.96

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$60.72

Advance Adapters NP231 Standalone Transfer Case Shifter Brackets

Retro-fitting a transmission or adding a body lift can cause misalignment of your shifter. Advance Adapters NP231 standalone transfer case shifter brackets resolve this issue, and when used with the factory Jeep skid plate, there is no welding or cutting as with other aftermarket kits. Advanced Adapters brackets eliminate the body type mount found in the Jeep TJ. Designed smarter than the factory shifter, they get a precise fit and smoother shifts.

4.91 out of 5 stars ( 11 )

$39.06

TCI Maximizer 4x4 Transmissions

Bring out the performance of your 4x4 with these Maximizer transmissions from the folks at TCI. Four-wheel drive vehicles are tough on automatics, especially with the addition of a lift kit and larger tires. Maximizer transmissions are built with that in mind. Each one is assembled with the strongest components available and designed to provide crisp shifts, time and time again. They give you all of that, and they'll deliver long and dependable service, too.

3.32 out of 5 stars ( 31 )

$1,596.95

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$4,976.95

On Sale

Artec Industries JK APEX Front Axle Trusses

Artec Industries JK APEX front axle trusses introduce a whole new level of cost savings, strength, weight savings, simplicity of installation, precision fitment, and complete axle protection never before seen in the industry. The key feature that sets the APEX truss apart is its unique peaked shape top which provides extra rigidity to the whole truss, while allowing both a reduction in weight (vs. using a thicker material top) and eliminating long weld seams. Previous versions with long weld seams have led to extra weld warping of the axle, longer install times, and can be inconsistent. This peaked structure not only applies to the axle tube between the coil perches, but extends underneath the coil perches as well—forming a complete truss from end to end of the axle, an industry first in an OEM axle application. The JK APEX truss has been tested and proved to hold up to both extreme applications and daily driving. Product details: * Patent pending APEX truss peaked top design provides more rigidity than a flat top truss design * Truss is CNC precision laser-cut in-house from 1/8 in. mild steel for a lightweight yet strong solution—only 7 lbs. * Truss is CNC precision-bent in-house for a great fitment; literally drop the truss in place on the axle and it's ready to weld—no puzzle piece assembling * Designed using 3-D models directly from Dana Corp and Jeep for an amazing fit and clearances with surrounding components * 70 percent less welding needed than previous truss designs means less warping, faster turnaround, and lower costs * All long seams are bent so you don't need to spend time welding them together * APEX design continues under the OEM coil buckets for complete end-to-end axle reinforcement—an industry first * Dimpled holes provide weight reduction, rigidity, and strength * Contours to the cast steel differential and can be welded with normal MIG welder and moderate pre-heating and post-heating * Provides worry-free wheeling of up to 37 in. tires on stock JK axles * Truss strengthens the weakest sections of the axle—under the coil perches, around the control arm brackets, and where the tube enters the casting * Low-profile design doesn't go over differential and allows usage in vehicles with only slight lift

Not Yet Reviewed

$120.99

$96.79

Skyjacker Transfer Case Shifter Brackets

The problem with the stock transfer case shifter linkage is that it attaches your shifter to the body and is then attached to the transfer case. The patent-pending design of these Skyjacker transfer case shifter brackets eliminates the attachment point at the body, also eliminating geometric discrepancies from the stock location. Usually, this problem occurs with vehicles using a body lift, engine swap, transmission mount, or riser-type motor mounts. Engage your transfer case the correct way with one of these Skyjacker transfer case shifter brackets.

Not Yet Reviewed

$98.92

Rough Country CV Driveshafts

Want to eliminate vibration issues? A good choice is Rough Country CV driveshafts. Available for many trucks, SUVs, and Jeeps, each package contains a stronger, better quality, extended CV driveshaft to promote better geometry for your lifted vehicle. Most kits also include flanges/yokes and hardware. Choose the driveshaft designed for your vehicle.

Not Yet Reviewed

$399.95

Performance & Replacement Transmission & Drivetrain Parts