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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 )
$324.99
On Sale
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.
Not Yet Reviewed
$299.95
$242.95
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$292.95
On Sale
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.
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$329.95
$164.95
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$299.95
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.
( 1 )
$153.00
On Sale
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
$280.95
$252.85
On Sale
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.
( 1 )
$228.95
$206.05
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.
( 1 )
$28.99
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$152.99
Compatible with GM vehicles originally equipped with LS Series 4L60E transmissions, ICT Billet automatic transmission adapter wiring harnesses are used to retain all appropriate electrical connections to the transmission when converting from 4L60E to 4L80E. Don't allow poor conductivity issues to cause your engine to run poorly. For trouble-free, consistent performance, use ICT Billet adapter wiring harnesses. Features and specs include: * Assembled with OEM tooling, OEM Delphi connector, lock, seals and terminals, and uses OEM harness wire colors for a perfect fit * Supplied VSS connector plugs into front input speed sensor in transmission. Connector from engine harness plugs into rear VSS sensor in transmission. * Contains 1 transmission adapter harness and 1 vehicle speed sensor connector
( 3 )
$144.99
TCI EZ-TCU main harnesses are the replacements you need to keep your transmission control unit connected to performance. These are identical to the originals that came with your units, and they offer the right fit and function for your controller. Whether you need them because of damage, loss, or the desire to have a spare on hand, TCI EZ-TCU main harnesses are available as replacements so that you can continue maximum control over shift points, shift firmness, and shift speed.
Not Yet Reviewed
$225.95
On Sale
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
$275.95
$248.35
TCI offers these internal wiring harnesses as quality replacements for damaged originals. They can also be used to update your system to a later-style harness.
Not Yet Reviewed
$195.95
Fleece Performance GM Automatic transmission 20-pin pigtails feature 12 in. leads labeled with the pin positions to aid in installation and they include 20 heat-sealable butt-style connectors. These Fleece replacements are produced in-house with fully automated wire cutting and terminal crimping to ensure you get the highest quality replacement parts you need to get your truck back on the road quickly.
Not Yet Reviewed
$99.99
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.
( 1 )
$53.20
Summit Bucks
ACDelco GM Genuine Partst automatic transmission wiring harnesses are a GM recommended replacement for your vehicles failing component. They are manufactured to provide you with the same performance, durability, and service life you expect from General Motors.
( 1 )
$152.99
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.
( 1 )
$101.87
These TCI TCU transmission wiring harnesses make it easy to install even the most advanced computer-controlled transmission. They feature all OEM style connectors, high-temperature oil-resistant wiring, and a puncture-resistant outer sheathing for years of dependable service. TCI TCU transmission wiring harnesses are butt-connected, crimped, and soldered for maximum mechanical and electrical integrity. They use clearly labeled connections, making them simple to install.
Not Yet Reviewed
$89.95
Haltech Nexus Rebel LS T56 transmission adapter harnesses connect the transmission breakout connector on the Rebel LS main terminated harness to a T56 transmission vehicle speed sensor.
Not Yet Reviewed
$24.00
ATI PCS (Powertrain Control Solutions) offers automatic transmission controller replacement harnesses for model 705500, GM transmission 4L80-E or 4L85-E. The factory harness will work with carburetor or EFI applications.
Not Yet Reviewed
$251.99
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
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