Automotive Wiring Accessories

Holley Sniper Transmission Controller Harnesses

Holley Sniper offers transmission-specific controller harnesses for a variety of GM and Ford automatic transmission models. The plug-and-play harnesses are pre-terminated with j4 connectors. Order the harness recommended for your EFI application.

3.0 out of 5 stars ( 2 )

$275.95

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$306.95

Summit Racing™ Kickdown Switches

Summit Racing™ offer kickdown switches for a wide range of vehicle, engine, and transmission applications. Kickdown can be used when maximum acceleration is needed, such as passing another car. When the accelerator pedal is depressed all the way to the floor (past the normal full accelerator position), the transmission will automatically engage kickdown—immediately shift down to a lower gear. These replacement switches are built to ensure performance and dependability.

5.0 out of 5 stars ( 3 )

$30.99

MSD Atomic Transmission Control Module Harnesses

Hoop up your Atomic TCU with MSD Atomic transmission control module harnesses. They are designed to fit your specific transmission model and have the proper wiring connector for a direct fit.

4.0 out of 5 stars ( 8 )

$280.95

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$337.95

On Sale

Holley GM Transmission Wiring Harnesses

Holley GM transmission wiring harnesses are designed to work in conjunction with Holley Dominator EFI fuel injection systems. These application-specific complete terminated harnesses come with a J4 connector to operate General Motors electronic transmissions. For all of your transmission management systems and accessory needs, go with Holley.

Not Yet Reviewed

$286.95

$215.95

FiTech Transmission Control Harnesses

Whether you want to add an automatic transmission to your vehicle with a FiTech fuel injection system or need to replace a damaged harness, FiTech transmission control harnesses get the job done. Repair or customize your vehicle's sensor layout the proper way with the FiTech transmission control harness designed for your application.

5.0 out of 5 stars ( 1 )

$153.00

ATP Automatic Transmission Wiring Harnesses

ATP Automotive provides one of the widest product offerings of automatic gear-shifting control products, including transmission wiring harnesses, for most import and domestic vehicles. ATP designs and manufactures them to meet or exceed the OEM specifications to properly control your drivetrain. Get exact-fit, no-compromise replacement parts when you order the ATP automatic transmission wiring harnesses designed for your application.

5.0 out of 5 stars ( 1 )

$37.99

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$158.99

Bowler Performance Transmission Speedometer Plugs

If you're using a mechanical speedometer cable, you'll need to cover the port with a plug. Bowler Performance transmission speedometer plugs will block off the mechanical speedometer port opening on Tremec TKX, TKO, 3550, Borg Warner T-45, Ford T-5, and the T-56 Magnum transmissions. If you're running an electronic speedometer, this is a must-have. These high-quality plugs are machined from billet aluminum. An O-ring is also included to prevent fluid leaks. (Does not include bolt.)

3.67 out of 5 stars ( 3 )

$41.99

Dorman Transmission Range Sensors

Dorman transmission range sensors are designed from high-quality materials for sustained reliability. They'll ensure that the correct gear selection input is provided to the electronic control unit. These direct replacements offer a proper fit, and they feature connectors with weatherpack seals for effective corrosion prevention—plus durable wire looms that protect wiring from oil and heat damage. Restore your ability to start the vehicle and assure smooth shifting with Dorman transmission range sensors. They're available for a wide variety of specific make/model vehicles.

5.0 out of 5 stars ( 4 )

$32.99

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$130.99

Sonnax Wiring Harness Connector Brackets

It's common for one of the three plastic retention tabs to break on the wiring harness case pass-through connector in GM 4L80-E and 4L85-E units. This allows the connector to be pushed into the case when connecting the external harness. Not only does this require extra labor to fix, it also requires a new wiring harness. Sonnax wiring harness connector bracket 34998-01K retains the internal harness connector even though the retention tabs may be broken. Additional notes: * Bracket firmly holds the connector in place from inside the pan using existing hardware * Connector bracket saves expensive wiring harness replacement * Bracket and bolts are included * 4L80-E and 4L85-E units use two different wiring harness connector styles. The early style has exposed terminals and a red rubber gasket. The late style has a gray plastic enclosure surrounding the terminals. The Sonnax bracket 34998-01K works only with the late style connector.

Not Yet Reviewed

$3.99

Bowler Performance All-in-One Transmission Wiring Harnesses

Bowler Performance All-in-One transmission wiring harnesses for the Tremec T-56 Magnum transmission comes equipped with all the connections pre-wired into one harness for a simple installation and ease of use. The small epoxy sealed controller is mounted to the VSS output using the existing bolt, and once the unit is powered up, you will be able to connect via Bluetooth to your Apple or Android smartphone using Bowler's free app. The app will give you the ability to customize the input and output settings for each feature to ensure proper operation in your vehicle. The perfect finishing touch for any Tremec T-56 Magnum conversion, Bowler's All-in-One harnesses eliminate the need for any additional equipment to operate the reverse lock out or generate the correct speedometer signals coming from your Tremec T-56 Magnum. Previously, you would have needed up to five separate parts to perform all the same functions wrapped one of these harnesses. The more technology we incorporate into our hot rods sometimes requires specific input signals to allow everything to function correctly. With the two speed outputs available in these harnesses, you can independently control the output of each one further eliminating any need for additional equipment and connections. Regarding the reverse lockout, Bowler has incorporated the same speed setting feature as the OEs into the All-in-One harnesses, giving you better control over when the lock out is triggered. Bowler's All-in-One harnesses give you much greater flexibility in the components you are able to use and require less time wiring everything up, providing an easier solution for setting up your Tremec T-56 Magnum transmission. Choose the harness version designed for your specific transmission make. Additional notes: * Harnesses utilize a small, built in, epoxy sealed box that will control each of the three functions with power and grounding for each function through a switched +12 V circuit and a wire connected to the negative battery post or engine block. * Control of the reverse lockout solenoid is based on a user defined speed setting (default is set at locked above 4 mph and unlocked at 0 to 3 mph), eliminating the need for a separate lock-out control box. * For your electronic speedometer, the harness is equipped with two speed sensor outputs; the speed sensor outputs generate a square wave signal that goes from about -5 to roughly +5 V, varying in frequency as the speed changes. * Output will automatically shift and give you 0 to +10 volts for EMC input needing positive only signal. * The two speed sensor outputs are completely independent and can be calibrated separately with any pulse count and ratio you want, and are able to drive any common speedometer, cruise control, or ECM. * Tremec T-56 Magnum reverse lock-out module VSS with dual output, pre-set as GM 40-pulse output on one and 16-pulse output on the other and can be adjusted with your iOS or Android device. * Includes wiring for reverse lights, reverse lock-out, and vehicle speed sensor.

4.0 out of 5 stars ( 5 )

$324.99

Holley EFI Dominator Transmission Harnesses

Holley EFI Dominator transmission harnesses provide control of your Tremec. The harnesses are terminated for VSS, reverse lockout, and reverse lights. Choose the one designed for your build.

2.0 out of 5 stars ( 1 )

$233.95

American Autowire Transmission Wiring Harnesses

American Autowire offers transmission wiring harnesses for a wide range of vehicles—particularly 1960s era cars and trucks with TH400 transmissions. These replacement kickdown harnesses are assembled from quality materials to deliver the same fit and performance as the originals.

4.0 out of 5 stars ( 1 )

$53.20

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$54.15

Dorman Transmission Oil Pressure Sensors

Dorman automatic transmission oil pressure sensors or transducers are designed to match the fit and function of the original component on specified applications. Made with quality materials and engineered for reliable performance and durability, Dorman replacements are the ideal solutions for failed parts causing low oil pressure. Select the sensor created for your vehicle.

Not Yet Reviewed

$50.99

On Sale

Holley Terminator X Max Chrysler Transmission Wiring Harnesses

Control select Hemi swap project transmissions through Terminator X MAX ECUs with Holley Chrysler transmission wiring harnesses. Terminator X ECUs give you unprecedented control of various components and systems within the drivetrain for enhanced driving performance. And Holley Chrysler transmission wiring harnesses provide plug-and-play compatibility with most factory connectors on select Chrysler transmissions for easier project completion.

Not Yet Reviewed

$281.95

$183.95

Ron Francis Wiring Transmission Harnesses

Ron Francis Wiring transmission harnesses are manufactured with factory correct connectors and terminals, quality crosslink automotive-grade wire, and high-temperature coverings. They also match factory dimensions for easy, trouble-free installation.

5.0 out of 5 stars ( 1 )

$101.87

Wiring Specialties OEM Series Transmission Wiring Harnesses

Wiring Specialties OEM Series transmission wiring harnesses are pre-assembled and designed to save you time, improve engine performance, and give the engine bay a factory appearance. Plus, Wiring Specialties backs up each OEM Series harness with a Turn Key Start-Up Guarantee! Transmission harness features: * Brand new wiring and connectors * OEM connector specs (no cheap aftermarket connectors that fall apart) * Replaces the OEM transmission harness entirely * Designed for a factory-like installation and look (for the Z32 OEM wiring connections and "T" junctions; no soldered connections at all) * Fully tested after production for easy plug-and-play replacement * Installs quickly and easily * Improved grounding connectors over stock * Available Tech support (7 days a week)

Not Yet Reviewed

$204.00

TCI EZ-TCU CAN Retro-Fit Harnesses

A CAN network allows different devices to communicate with each other. TCI EZ-TCU CAN Retro-Fit harnesses allows the EZ-TCU by FAST to be compatible with your transmission. For proper network performance, choose the proper TCI EZ-TCU CAN Retro-Fit harness for your vehicle's transmission.

Not Yet Reviewed

$57.95

Summit Racing™ Transmission Backup Light Connector Pigtails

Summit Racing™ transmission backup light pigtails are designed with an OEM-style connector to make installation a breeze. They feature a black rubber weather-resistant boot and 12 in. wire leads, and will plug right into most Ford T-5 manual transmissions.

4.84 out of 5 stars ( 32 )

$20.99

Summit Racing™ Transmission Converter Clutch Pigtails

Summit Racing™ transmission converter clutch pigtails are ideal replacements for faulty originals. These quality OEM-type connectors are designed for use with GM transmissions, including 700R4, 4L60, and the 4L70. Economical and easy to install, choose Summit Racing™ pigtails for the performance you expect!

5.0 out of 5 stars ( 15 )

$9.99

American Powertrain Transmission Connector Pigtails

American Powertrain transmission connector pigtails replace a faulty or damaged harness—and get your electrical system working properly again. If your pigtail wires are malfunctioning, these direct replacement connectors will plug in and convey signals from your transmission to the appropriate components. The factory-style connectors have positive and negative wiring to allow for easy installation. They're available for various applications.

4.75 out of 5 stars ( 4 )

$20.00

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$30.45

Bowler Performance Transmission Backup Light Connector Pigtails

Reconcile the relationship between your transmission and reverse lights with Bowler Performance transmission backup light connector pigtails. They are direct replacement backup/reverse light harnesses for your damaged factory harness. They are unterminated and fit all Tremec TKX, TKO, Ford T-5, T-45, and Legend GT manual transmissions, along with any other application that uses a Pollack 2-post switch. Order yours today and get your ride back out on the road.

5.0 out of 5 stars ( 1 )

$31.99

Bowler Performance Transmission Wiring Pigtail Install Sets

Bowler Performance offers several transmission wiring pigtail install sets to reconcile the relationship between your transmission and reverse lights, VSS, reverse lockout, and/or speedometer. Sets include two or three different unterminated wiring pigtails, with some also including a billet aluminum speedometer block-off plug with O-ring. Install your transmission with the correct pigtail sets from Bowler Performance.

Not Yet Reviewed

$48.99

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$94.99

ICT Billet Transmission Adapter Harnesses

This adapter harness from ICT Billet allows you to adapt a 4L65E or 4L70E harness to a 4L80E transmission. It's assembled with OEM tooling and OEM color wiring for a perfect fit. Don't take a chance with cheap wiring harnesses that use poor quality wire, have poor crimps, or have unseated terminals that will cause your engine to run poorly and be difficult to diagnose.

Not Yet Reviewed

$43.99

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$144.99

Ron Francis Wiring Transmission Backup Light Connector Pigtails

Ron Francis Wiring transmission backup light connector pigtails come with a factory-correct molded connector and 9 in. wire leads. These replacements will connect to most any Ford T-5 manual transmission--and others, as well. Get connected safely with Ron Francis wiring pigtails.

Not Yet Reviewed

$30.33