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2003 Transmissions
Showing In Stock Items. Show All 231 Items.
TransGo Performance Shift Kits
TransGo's Performance shift kits give you the hard-launching, tire-blazing shifts you want, after just a few hours' work with basic hand tools. TransGo even has kits for computer-controlled, 4-speed automatics. Their performance shift kits can be installed with the transmission in the vehicle and they come with complete instructions. Some kits even include a step-by-step video to walk you through the installation process.
( 510 )
$101.81
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$167.14
Lokar Midnight Series Flexible Braided Stainless Transmission Dipsticks
Lokar's Midnight Series flexible braided stainless transmission dipsticks feature a heat-resistant PTFE rod with a black braided stainless steel cover. The flexible inner rod is stamped with appropriate trans-fluid levels, and the outer housing has a slim design that allows for mounting them inside of the headers. They're available in both firewall-mount and trans-mount styles, and a funnel adapter is included for assistance with filling. Order the length recommended for your transmission application.
( 80 )
$151.95
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$176.95
Summit Racing™ Automatic Transmission Rebuild Kits
On average, transmissions last between 30,000 to 50,000 miles before requiring maintenance. When that milestone occurs, Summit Racing™ offers automatic transmission rebuild kits for more than a dozen transmission models spanning a half-century. The kits include all-new clutches, oil seals, gaskets, lip seals, and a transmission filter. These rebuild components are an economical way to restore performance. Order the kit recommended for your application.
( 36 )
$239.99
PRW Black Label Special Edition Flexplates
Introducing the Black Label Special Edition flexplates—the newest addition to PRW's flexplate lineup that meet the SFI 29.1 specification, which is a significant improvement over the OEM flexplates. The Black Label Special Edition Series flexplates are available for most Chevy, Ford, and Hemi applications. All of these applications conform to all published SFI standards, with the added benefits to the racing and performance builder that is looking for and demands the best in quality and engineering. Choose the model designed for your application needs. Key features: * Exceeds SFI Specification 29.1 * Perfect for road racing and lighter vehicles * Several fitment options for early-to-later model transmission swaps * Compatible with most aftermarket racing and high-performance torque converter bolt patterns
( 5 )
$110.29
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$147.89
Chevrolet Performance Flexplate Dust Covers
These Chevrolet Performance flexplate dust covers are direct stock replacements providing protection from street grime and stones. They are manufactured from quality materials and install in the factory location with no modifications. The dust covers are available for different transmission models, so you can choose what's best for your specific transmission model.
( 36 )
$245.53
On Sale
Mr. Gasket Automatic Transmission Oil Pans
These automatic transmission oil pans from Mr. Gasket are stock-depth chrome plated pans. They come complete with a washer and gasket and most have drain plugs.
( 93 )
$129.95
$116.95
Summit Racing™ Manual Transmission Bellhousings
Summit Racing™ offers a complete line of manual transmission parts—including these quality manual transmission bellhousings that feature all-new CNC-machined castings for tight tolerances and a precision fit. Our Summit Racing™ bellhousings are designed to help eliminate flexing, true up clutch alignment, and decrease wear on internal transmission components. They're available for a wide range of Chevy and GMC applications from the 1950s and up.
( 7 )
$189.99
PRW Gold Series Flexplates
PRW Gold Series flexplates are engineered to handle extreme duty applications and designed to endure the punishment of modern high horsepower engines. The 4mm thick centerplate provides a solid foundation for these direct bolt-on drivetrain components. Ring gears are precision double-welded, utilizing robotic machinery and cold-welding processes for added durability. These flexplates are rigorously inspected throughout the manufacturing cycle to ensure you receive the expected quality. They are available in a wide variety of configurations to precisely match your application. Raise the bar on your high performance vehicle with PRW Gold Series flexplates. Order the style recommended for your specific vehicle and engine size. Features and specs: * Designed to fit standard OEM, aftermarket replacement, and high performance torque converters * SFI 29.1 certified * Forged one-piece steel ring gears * 0.035 in. thicker than stock flexplates * Constructed from cold-rolled chromoly steel * Long lasting yellow zinc plated finish
( 48 )
$103.18
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$129.73
Chevrolet Performance Slave Cylinders
These slave cylinders from Chevrolet Performance are designed to transfer fluid for your throwout bearing aiding in easy pedal pressure. These slave cylinders are great stock replacements and made with all the quality you've come to expect from a name like GM.
( 14 )
$180.99
Summit Racing™ SFI-Approved Flexplates
Our Summit Racing™ SFI-approved flexplates are built for racing. They're thicker than stock, double-welded with a forged one-piece ring gear. Available in several internally and externally balanced applications. NOT FOR MARINE APPLICATIONS.
( 510 )
$161.99
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$196.99
Sachs Stock Replacement Flywheels
Replace your worn-out or malfunctioning flywheel with one of Sachs Stock Replacement flywheels. These quality components are built to OEM specifications to offer the same fit, form, and function as the factory part, which means a safer, more comfortable, and contemporary drive. All Sachs Stock Replacement flywheels are designed to provide superior performance and dependability to help restore your vehicle back to its proper operation. Choose the replacement flywheel designed to fit your application needs.
( 1 )
$101.99
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$230.99
Summit Racing™ OE Replacement Flywheels
Summit Racing™ OE replacement flywheels offer a great fit and an economical price. They are manufactured from ductile iron and offer original fit and function. Replace your old flywheels with Summit Racing™ OE parts.
( 72 )
$135.99
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$141.99
Sonnax Shift Improver Performance Packs
Sonnax shift improver performance packs combine innovative heavy-duty performance calibration for firmer shifts under load without sacrificing low-speed drivability. The precision components in these kits upgrade your transmission for maximum achievement and durability by recalibrating pressures, recalibrating shift accumulation, and including improved parts for areas that commonly wear. They are suitable for any heavy-duty application and are a critical foundation for other upgrades when modifying the transmission for high performance use. Sonnax shift improver performance packs additional facts and features: * Shorter shifts, which get progressively firmer with load * Faster pressure increase and higher overall pressure for greater clutch/band holding power * Three ultra-reliable, patented, billet pinless accumulator pistons * Unique 1-2 accumulator spring combination for shifts with character * Improved high rpm pressure * Third accumulator valve gets the 2-3 right the first time, every time * Consistent results, no guessing on calibration * Prevents worn accumulators and separator plate * Optional TCC on-off conversion prevents excess TCC pressure
( 6 )
$176.59
Advance Adapters LS Series Flexplate Adapter Kits
Advance Adapters LS Series flexplate kits allow you to fit the TH400/TH350/700R transmission to the Gen III/LS engine. The kits include a custom flexplate to fit your specific transmission, a crank spacer that compensates for the shorter engine crank, and 11mm flexplate bolts.
( 48 )
$176.71
Lokar Hi-Tech Flexible Braided Stainless Transmission Dipsticks
Lokar's Hi-Tech flexible braided stainless transmission dipsticks match right up with other Lokar accessories. They feature a flexible, heat-resistant PTFE rod with a braided stainless steel cover. The inner rod is stamped with appropriate trans-fluid levels, and the outer housing has a slim design that allows for mounting inside of the headers. These dipsticks are available in both firewall-mount and trans-mount styles, and a funnel adapter is included for assistance with filling. Order the length and other options preferred for your vehicle make and transmission application.
( 337 )
$138.95
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$176.95
On Sale
Hays Heavy-Duty Flexplates
Hays heavy-duty flexplates for high performance and competition engines are constructed from a thicker-than-stock steel plate. This enables them to withstand the stress of high-stall torque converters and high-rpm engines. While factory stock plates tend to crack around the crankshaft hub when punished under high-torque and rpm conditions, the thicker Hays flexplates can handle the force. These heavy-duty flexplates are supplied with a ring gear that is securely welded in place. All Hays heavy-duty flexplates are zinc-dichromate plated to resist corrosion and SFI-certified under specification 29.1.
( 63 )
$227.95
$170.95
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$205.15
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.
( 54 )
$104.50
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$248.99
ACDelco GM Genuine Parts Flexplates
ACDelco GM Genuine Parts flexplates are designed, engineered, and tested to rigorous standards and backed by General Motors. They're true OE parts that will replace your originals with the same fit and performance, and are updated to integrate new materials and technologies. Order the flexplate model recommended for your vehicle.
( 9 )
$125.99
McLeod Non-SFI Aluminum Bellhousings
McLeod Non-SFI aluminum bellhousings are the gold standard when it comes to accuracy and compact performance. These Non- SFI rated version is for those customers looking for a light weight bellhousing, but not concerned with a SFI rating so these units do not come with a steel block plate.
( 8 )
$195.50
ATS Diesel Performance GM Governor Pressure Solenoid Block Conversions
ATS Diesel Performance GM governor pressure solenoid block conversions are an easy bolt-on upgrade for your factory transmission. They are designed to eliminate shuttle shifting, improve reliability, and enhance transmission performance. Order the model recommended for your application.
( 12 )
$194.99
McLeod Nodular Iron Flywheels
McLeod nodular iron flywheels offer a high-quality, yet low-cost alternative to the hassle of resurfacing a flywheel. Nodular iron flywheels are stronger than the OEM models, and these McLeod units are direct bolt-in units. Don't overlook the flywheel when replacing your clutch. But don't resurface—simply replace with McLeod nodular iron flywheels, available for vehicle and engine applications spanning six decades.
( 28 )
$195.00
PRW Pro Series Flexplates
PRW offers Pro Series flexplates for a wide range of applications—raising the bar in the high performance industry. The combination of top quality and reasonable pricing sets new standards. These replacements are engineered to handle extreme-duty applications and designed to take the punishment of today's high-horsepower engines. The 4mm thick centerplate provides a solid foundation for these new designs. Ring gears are precision-welded to meet SFI specifications, utilizing robotic machinery and cold-welding process. The steel flexplates are machined for excellence and rigorously inspected throughout the manufacturing cycle to ensure that customers receive the quality they've come to expect from PRW products. Additional details: * SFI 29.1 certified * Direct bolt-on component * Forged one-piece steel ring gears * 0.035 thicker than stock flexplates * Constructed from cold-rolled premium steel * Features double-welded ring gears for added durability
( 1 )
$142.36
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$206.58
South Bend Clutch Hydraulic Assemblies
It's common for clutch hydraulic systems to become aged or weak, meaning you won't be able to select gears in the transmission. Even if your hydraulics are still working properly, if you're upgrading the clutch in your truck (or plan to), it might be time to invest in a heavy-duty hydraulic assembly from South Bend Clutch. Some factory hydraulic assemblies aren't up to the task of handling a dual-disc or even a stronger single-disc clutch. Purchasing upgraded hydraulics at the same time you order your performance clutch is highly recommended. South Bend Clutch hydraulic assemblies are engineered to enhance your vehicle's performance. They are made to stringent quality standards to ensure exceptional durability and years of trouble-free service. The kits are complete, typically including a master cylinder (adjustable on select models), slave cylinder, remote reservoir, and braided stainless steel hoses. South Bend Clutch replacement hydraulic assemblies are ready to work hard and play hard--just like your rig.
( 67 )
$249.52
TransGo Overdrive Pressure Plates
TransGo's fully CNC-machined overdrive pressure plates will allow you to quickly and easily add extra capacity to the overdrive clutch pack. The pressure plates are a direct fit for the OEM drum. Consequently, there is no need for you to spend a small fortune on an aftermarket drum. When using this TransGo pressure plate, you can add two overdrive fricitions for single-sided application and one overdrive friction for double-sided application. For the single-sided friction setup, like in the 68RFE, the new stack up yields a 15 percent increase in surface area. Alternatively, for double-sided friction setup, like in the 545RFE, the end result is a 25 percent increase in surface area. For performance shift options you want, without sacrificing durability, choose TransGo overdrive pressure plates.
Not Yet Reviewed
$110.06
