Transmissions & Transmission Parts

Sonnax Externally Adjustable Low/Reverse Servo Kits

Sonnax externally adjustable low/reverse servo kits make band maintenance quick and easy. They offer an ideal way to improve reliability and make staging more consistent and predictable. Checking L/R band adjustment after repeated use is good practice. Unfortunately, OE servos with steel covers are difficult to adjust in a vehicle, so a quick check with such a servo installed is impractical for most racers. Sonnax externally adjustable servos provides an improved design that makes checks and adjustment of the L/R servo easy. There is no cover or access plug to remove because the adjuster itself extends through the cover. A quick check is done simply by pushing on the end of the adjuster and observing the movement of the piston relative to the servo cover. Select the kit designed for your transmission. Features: * Quickly check and adjust the low/reverse band to prevent trans-brake malfunction * Unique servo cover and adjuster design makes in-vehicle band service easy * Works with or without OE 1-2 accumulator piston Included: * 6061 Anodized billet aluminum cover * Piston * Pin * Jam nut * Cover seals -- Two PTFE, one extra * Piston seal * Cover O-ring * Pin O-ring Kit for TH400 will also include: * Cover flange O-ring * Bolts (6) * Washers (6)

Not Yet Reviewed

$353.26

Sonnax Feed Limit Low Valve Kits

The feed limit low valve in listed GM transmissions limits line pressure feed to the default disable solenoid and control valves. Feed limit low pressure is also connected to the boost ball system for "A" and "B" clutch control. This feed limit low valve is subject to significant side-load force, resulting in severe wear and pressure loss to the default disable solenoid and connected control valves. Such pressure loss can put the vehicle into default mode at high speeds, resulting in momentary wheel lockup, sudden downshift to 2nd gear, harsh shifts or a P0747 code. The feed limit low valve can wear out in as little as 30,000 miles, with many vehicles requiring service by 35,000 miles. A national recall from GM includes installing updated software that monitors valve performance and wear, then triggers a check engine light and reduced propulsion message 10,000 miles before failure. Vehicles are then limited to 5th gear, commonly referred to as limp mode, until the valve body is serviced to address the failed valve. Sonnax patented this drop-in feed limit low valve kit to overcome bore wear, restoring proper valve function immediately without the need or expense of replacing the entire valve body. The valve reroutes the balance circuit through an internal passage, significantly reducing the side-load force, while upgraded materials prevent future wear. * The kit overcomes drivability issues related to the GM 10-speed wheel lockup recall * Patented valve and sleeve combination overcomes bore wear and significantly reduces future side loading of the valve * Hardcoat anodized aluminum valve and wear-resistant sleeve combat premature wear * Drop-in Zip Valve parts install quickly and easily * Kit contents: -- Valve -- Sleeve -- Spring -- Retainer -- Drill -- Rivet (Note: The OE feed limit low valve is susceptible to premature wear and therefore a critical failure point. Replacing the valve is recommended even if the transmission isn't exhibiting problems and the valve passes a vacuum test.)

Not Yet Reviewed

$27.99

Sonnax Low/Reverse Sprag Rebuild Kits

In some transmissions, the low/reverse sprag elements, end caps, and retainer plates are prone to wear, while the race is often unaffected, resulting in a bind-up going into 2nd gear or a 1-2 flare. Sonnax low/reverse sprag rebuild kits allow replacement of the caps, elements, and retainer plate without the expense of buying a full sprag assembly. Select the kit designed for your transmission. Contents: * Sprag clutch element without race * End caps (2) * Retainer plate * Snap ring

Not Yet Reviewed

$66.99

Sonnax Low Sprag Race and Bearing Kits

Sonnax low sprag race and bearing kits are ideal replacements for lost or damaged components. They feature a thrust bearing, inner race, and 1.013 in. thickness. If you're looking for parts for your one-way clutch from an industry leader in cutting edge design, a Sonnax low sprag race and bearing kit fits the bill.

4.0 out of 5 stars ( 1 )

$30.99

Low Range Off-Road Clutch Kits

Low Range Off-Road clutch kits are available for a wide variety of years, makes, and models. LROR has done their research to find some of the best parts from several clutch manufacturers. If you're looking to replace your old worn-out stock clutch and don't need anything with more grip, LROR's Stage 1 OE-replacement clutch kits are economical and meet or exceed OEM requirements. Like almost all of their clutches, most feature DST (diaphragm spring type) pressure plates--much better than many other aftermarket clutch covers. For an upgrade, look to LROR's Stage 2 dual-surface organic and ceramic clutch kits. They easily surpass factory clutches and provide much better reliability, great engagement, and heavy-duty friction without compromising OE clutch feel. The organic material on one side reduces chatter and maintains near-stock feel. The ceramic side far surpasses woven glass or organic materials. It can handle repeated hard usage because of its impressive characteristics and much higher coefficient of friction. Low Range Off-Road Stage 3 high performance, all-ceramic clutches are their extreme-duty kits. They provide up to twice the life of factory clutches with seriously improved clamping force. Their lighter design reduces the chance of catastrophic failure due to excessive rpm and from clutch spin-down where the disc continues to spin after being disengaged. Also, ceramic clutches don't fade like conventional clutches when they get hot. You get the same solid performance hot or cold. Most Low Range Off-Road clutch kits include the following: * Clutch disc * Clutch cover/pressure plate * Pilot bearing * Release bearing * Alignment tool * Grease packet * Installation Instructions

5.0 out of 5 stars ( 1 )

$288.35

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$433.25

RevMax Low Stall Stage 5 Torque Converters

RevMax Low Stall Stage 5 triple-disc billet torque converters are designed for those who have heavily modified engines or for those who tow heavy weights. The showpiece of these converters is the RevMax patented torque converter stator sprag retainer (some models). This technology cannot be purchased anywhere else! Unlike most of the competition, RevMax has redesigned the lockup clutch piston to be able to accommodate a piston damper. The billet piston and damper allow the clutch to apply smoother—which in turn puts far less strain on the input shaft. RevMax Stage 5 converters have no horsepower or torque limitations. They're available for a variety of applications, including many Dodge, RAM, Chevrolet, and GMC trucks with Mopar or Allison transmissions from the 1990s and up. Additional details: * CNC-machined billet one-piece front cover * Raybestos or Alto, high performance triple disc lockup frictions * Billet lockup apply piston with performance spring damper * RevMax proprietary CNC-machined stator designs * RevMax patented sprag retainer (not on Allison models) * RevMax proprietary input shaft seal (not on Allison models) * Billet bearing cap * Dual Torrington Bearing stator design * 4140 flanged impeller hub * 4140 hardened turbine hub * Furnace brazed impeller * TIG-welded brazed turbine * Computerized robotic welding * Precision internal clearances set to increase efficiency and improve performance * Fully pressurized and leak-tested

Not Yet Reviewed

$1,349.00

TCI Ford C-6 Low-Drag Planetary Sets

Boost the efficiency of your transmission with some help from the folks at TCI Automotive. These Ford C-6 low-drag planetary sets replace troublesome stock thrust washers with needle bearings to reduce friction and help extend transmission life. These low-drag planetary sets include: * Forward planetary assembly * Forward clutch hub * Reverse planetary assembly * Reverse ring gear * Rear sprag inner race * Roller bearing rear park gear

2.0 out of 5 stars ( 3 )

$450.95

TCI Powerglide Low Drag Tailshafts

Maximize the strength of your Powerglide transmission with one of these TCI Powerglide low drag tailshafts. They feature stock design casting with a billet machined tailstock and have a steel full roller bearing installed to provide ultra-low rolling resistance. The tailshafts include the necessary hardware and bolt directly onto your Powerglide case.

Not Yet Reviewed

$194.95

On Sale

QuickTime Bellhousings

QuickTime bellhousings for Circle Track, strip, and street applications are built from high-grade steel. The cone is spun, not rolled or stamped, allowing these bellhousings to be the most dimensionally stable and accurate for today's high performance vehicles offering proven performance. Choose the size and specs needed for fitment on your particular vehicle, then bridge your transmission and engine with a QuickTime bellhousing.

4.5 out of 5 stars ( 107 )

$972.95

$874.95

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$1,649.95

Sonnax Servo Piston Kits

If you're looking for an easy upgrade to your automatic transmission, Sonnax Servo piston kits may be the answer. The improvement in shift quality is an immediate and noticeable value. These direct replacement kits will help to eliminate a bit of a "sloppy" gear performance caused by faulty OEM servo units. With all necessary rings and seals to prevent leakage and handle higher pressure, Sonnax servo pistons can be your link to greater band apply force. Choose the kit that matches your vehicle specs, then expect faster and firmer shifts!

4.77 out of 5 stars ( 30 )

$82.86

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$374.35

Sonnax Automatic Transmission Servo Pistons

Maintaining your transmission can save you from costly replacement bills. Sonnax automatic transmission replacement servo pistons feature a dual-seal design and can be used with one or two PTFE or OEM-style cast seals. Accompanying replacement components are also available from Sonnax.

5.0 out of 5 stars ( 1 )

$66.47

Sonnax Adjustable Rear Servo Pin Kits

The Sonnax adjustable rear servo pin kit 34912-01K replaces GM TH400 and '95-earlier 4L80-E servo pins. OE pins have seven different lengths to allow for adjustment of the Low/Reverse band—but are no longer available from GM. The Sonnax pin kit has an adjustment range that covers the five longest OE pins to allow for accurate setting of the Low/Reverse servo piston travel. The pin features an O-ring groove to prevent leakage of line pressure past the case pin bore. Kit contents: * Servo Pin * Screw * (4) Small washers * (1) Large washer * (2) O-Rings

3.0 out of 5 stars ( 2 )

$33.17

ATI Powerglide Transmission Super Bands

ATI Super Bands are high performance replacements for Powerglide low gear bands, which are so critical in the operation of a race transmission. These bands are completely new cores made of invest cast steel, machined totally in-house with all-new components. Providing 21 percent more clamping area than stock bands, their lining is made of heavy-duty materials to ensure high performance and longevity. They are recommended for use with all popular dual ring servos.

5.0 out of 5 stars ( 2 )

$216.99

TCI Sprags and Roller Clutch Kits

These sprags and roller clutch kits from TCI are all-new OEM assemblies. Replacing the forward sprag assembly and low-reverse roller clutch is a must when building a high performance 700R4/4L60E. These forward sprags are 29-element, which makes them ideal upgrades for earlier 700R4 transmissions that were built with weaker sprags from the factory.

4.33 out of 5 stars ( 3 )

$47.95

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$106.95

Sonnax Master Servo Piston Kits

Sonnax master servo piston kits replace your piston and cover with no modifications needed to the case. These direct-fit kits are stronger to handle higher pressure and feature a no-leak, dual O-ring billet aluminum servo for superior sealing.

Not Yet Reviewed

$83.63

Sonnax Valve Body Detent Ball and Sleeve Kits

The detent ball in the valve body in listed Chrysler automatic transmissions (see Applications tab) wears into the aluminum bore due to continuous movement and vibration of the linkage. This creates excessive looseness in the manual valve lever and allows the manual valve to move out of alignment. No start or being stuck in Park can occur from the manual valve being out of position due to extra clearance. This condition often requires that the valve body be replaced. Sonnax valve body detent ball and sleeve kits allow the valve body to be salvaged. The bore must be oversized using the self-guiding bench reamer included in Sonnax tool kit 22771-TL12. A .096 in. diameter drill bit is also included to allow the retaining pin hole to be redrilled for use with the OE pin. Sonnax detent spring 22771-36 is also available. Additional notes: * Precision steel sleeve restores worn valve body and properly supports the detent ball * Precision-ground steel ball included for optimal fit with the replacement sleeve * Self-guiding bench-style reamer allows casting to be oversized quickly and accurately without specialized equipment * Kit is designed to fit both the short and long OE detent bore designs

Not Yet Reviewed

$20.99

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$21.99

Summit Racing™ Automatic Transmission Bands

Summit Racing™ automatic transmission bands are engineered for performance and reliability using high quality linings and adhesives. These bands feature steel straps and are offered in a variety of friction materials like, KEVLAR®, Alto Red, and Carbonite, for several different model transmissions.

3.0 out of 5 stars ( 2 )

$113.99

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$206.99

RevMax Billet Servos

RevMax billet servos are a must-have component for all high performance applications! The stock servo is notorious for cocking in the bore and causing the low and reverse band to bind and not release properly. The RevMax billet servo is guaranteed never to stick and cause this issue, and also provides great sealing capabilities by adding a second sealing ring.

Not Yet Reviewed

$59.00

TCI Fast-Lap Circle Track Torque Converters

These TCI Fast-Lap torque converters provide the best of all benefits, including great acceleration when you need it. Utilizing an extremely low stall speed, these torque converters also provide more engine braking going into the corners and faster acceleration coming out of the turns. The Fast-Lap torque converters are the ideal solution for racers looking for better performance at a reasonable price. Combining 35 plus years of torque converter technology and on-track testing, the engineers at TCI selected the optimum stall speed for dirt and pavement Circle Track competition. These reduced stall speed torque converters incorporate heavy-duty oversized bearings for increased load capacity and less drag to deliver a product that is far superior to stock and other aftermarket converters currently available. Like every TCI torque converter, these units feature the exclusive HDT Coating for improved temperature transfer and are triple tested to ensure durability and on-track performance.

4.43 out of 5 stars ( 14 )

$364.95

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$475.95

FTI Performance Sun Gear Bushings

Install FTI Performance sun gear bushings to restore critical clearances and resist untimely wear. These automatic transmission bushings—also referred to as Powerglide wedding bands—are made of high-grade materials to provide superior wear characteristics. This helps to eliminate premature deterioration for worry-free operation.

Not Yet Reviewed

$13.39

VEGE Remanufactured Heavy-Duty Torque Converters

With the largest selection of remanufactured torque converters in the world to fit any transmission, model, or vehicle application, all VEGE remanufactured torque converters are built with parts that are of equal quality or higher quality than OEM (Original Equipment Manufacturer) parts, including VEGE's heavy-duty remanufactured torque converters. You can expect the best with VEGE! Specializing in reliable, yet affordable, sealed torque converters, VEGE torque converters are among the most popular in the industry. Their unique process combines the skillful experience of bench craftsman with the industrial engineering production line. Choose the torque converter model suited to your application needs.

3.55 out of 5 stars ( 11 )

$238.99

Centerforce Billet Steel Flywheels

Centerforce billet steel flywheels are available for popular import and domestic vehicles, including trucks. They're CAD/CAM-designed and CNC-machined from billet steel for precise, no-hassle, bolt-in installations. No modifications are required in combination with either Centerforce clutches or other clutch assemblies built to OEM specs. These rugged flywheels are SFI-approved, so you know that you can count on them--on the street and on the track.

4.52 out of 5 stars ( 61 )

$419.95

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$451.95

VEGE Remanufactured Torque Converters

VEGE has honed its remanufactured torque converter operation to optimize a steady outflow of a variety of products by using and adopting standard operating procedures to supply automotive, high-performance, heavy-duty, and industrial converters. VEGE torque converters incorporate the necessary upgrades to reduce failures. Areas that are known to fail such as pump and turbine blades are reset and re-enforced. The stators are completely disassembled and reloaded with new rollers and springs. Turbine hubs that have a high failure rate are replaced with billet steel hubs. Needle bearings are replaced with new ones and in most cases upgraded to heavy duty standards. VEGE torque converters are super balanced twice! Using state of the art Hines balancers all VEGE torque converters are checked for balance during the set up and tack and after final weld. This makes for a better dynamic running torque converter.

4.04 out of 5 stars ( 54 )

$98.99

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$278.99

ATI Transmission Bands

ATI transmission bands use the finest lining and adhesives available to ensure performance and reliability. They play an important role in transmission operations; Kevlar® lining is available for extreme-duty applications.

4.75 out of 5 stars ( 4 )

$207.99