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Sprags--or one-way clutches--are extremely important in GM TH350 and TH400 transmissions because they carry an up-shifting torque load. Prevent transmission failure with sprags and races from ATI Performance Products and compete with increased confidence.
( 5 )
$79.99
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.
( 504 )
$69.19
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$101.81
You can get Summit Racing™ transmission pans in Steel or Aluminum and in plain or finned styles. They are available in Chrome, Polished, Black Powdercoated, Zinc or Copper finishes. We offer stock depth or deep pan designs and come with a drain plug.
( 313 )
$54.87
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$107.99
Cast from 356 aluminum, our Summit Racing™ transmission pans are stock capacity and utilize cooling fins for better heat dissipation. These pans come complete with mounting bolts, a drain plug, and gasket. Upgrade your transmission with confidence using top quality parts from Summit Racing, where form meets function for unparalleled performance and reliability.
( 147 )
$96.99
Summit Bucks
The factory-original fit and lasting function of ACDelco Gm Genuine Parts automatic transmission pans provide a perfect repair without breaking your budget. They are designed, engineered, and tested to rigorous standards, and are backed by General Motors. Features: * Built with premium materials for prolonged service * Precisely engineered to OE specifications * Trouble-free installation and function ensured by rigorous testing procedures * Designed for direct compatibility
( 14 )
$59.99
TCI steel transmission pans are the perfect replacement for performance and appearance beneath your vehicle. These steel reservoirs are thicker than stock for longevity, and some models are beautifully chrome plated to further prevent rust—in addition to including a drain plug to facilitate fluid maintenance. Over time, many transmission pans develop a warped, leaky gasket flange, or become damaged by road debris. Protect your transmission by bolting on one of these economical replacement upgrades from TCI.
( 67 )
$67.95
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$85.95
Trans-Dapt Performance polished aluminum finned transmission pans dissipate heat better than standard steel pans, resulting in cooler oil temperatures. The drain plug, gasket, and chrome bolts are included. Order the model recommended to fit your transmission application.
( 35 )
$117.99
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.
( 91 )
$68.05
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$87.15
Trans-Dapt Performance offers OE replacement transmission pans for a variety of applications. Available in stock and deep pan styles, plain or finned, most pans include a drain plug for easy fluid changes. Order the model recommended for your transmission application.
( 47 )
$52.99
Replace your old flywheel/torque converter inspection cover with Mr. Gasket inspection covers. They are designed to fit most Chevrolet applications, these covers are made from beautifully chrome plated heavy-gauge steel. These covers are corrosion resistant and facilitate easy installation.
( 7 )
$69.35
Don't let worn-out gaskets on seals keep you from winning. TCI Racing Overhaul kits include oil seals, sealing rings, gaskets, and front and rear seals. Also included in each kit is a set of valve body gaskets. They have everything that you need in soft parts for an automatic transmission.
( 4 )
$83.95
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$84.95
TCI Automotive offers a wide range of automatic transmission rebuild components—including these PRO-X center support rings for GM TH400 transmissions. They're machined from durable material and original specs to provide the fit and performance you expect.
Not Yet Reviewed
$87.95
ATP automatic transmission control solenoids are designed to replace faulty factory units and keep your transmission shifting smoothly. They're available in a variety of configurations for dozens of transmission types—on thousands of vehicle applications. These replacement solenoids meet or exceed OEM specifications.
( 1 )
$66.99
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$101.99
Are you looking to upgrade the steels in your transmission's clutch pack? TCI has you covered with their premium-quality clutch steels. When it comes to quality performance, TCI has you covered.
Not Yet Reviewed
$85.95
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$89.95
On Sale
EBC standard CK series clutch friction discs are almost identical to original equipment clutch plates. These discs are cork-based products impregnated with aluminum particles to increase wear life and heat resistance. These clutch plates are compressed to avoid swell and clutch drag and feature an ideal general-purpose replacement material for all grades and sizes of motorcycles. Springs and clutch plates are sold separately.
( 5 )
$93.92
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$118.10
$84.53
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$106.29
Summit Racing™ speedometer gear kits are designed to recalibrate the gauge back to normal after changing rear axle ratios or tire diameters from stock. We give you a new "bullet" and a nice assortment of drive and driven gears to accommodate most street gear ratios and tire sizes. All you need to know are the tire diameter and rear gear ratio--and you can dial in the speedometer (and try to avoid those unwanted speed violations). Select the kit that's compatible with your transmission application.
( 22 )
$68.99
Summit Racing™ Corvette-style servo piston kits allow you to swap out your OEM servo on your 700R4 or 4L60E/4L65E automatic transmission and improve shift quality and firmness. They have a larger piston area which increases band-apply pressure and holding power. These kits are drop-in upgrades and will really firm up the 1-2 shift. Includes both pistons and all necessary O-rings.
( 17 )
$77.99
Summit Bucks
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.
( 7 )
$95.99
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
( 42 )
$84.52
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$107.91
American Autowire torque converter lockup kits allow for the installation of computer-controlled transmissions without all of the work involved to install the computer control unit. They include a pressure switch, inline fuse, and wiring harness with preterminated connectors.
( 16 )
$100.70
Summit Bucks
Sonnax Super-Hold servo kits offer increased apply area over the OEM servo for more holding force between shifts. They are manufactured from anodized aluminum and include mounting seals and hardware for your specific transmission model. Their improved seal design will conserve pump volume.
( 25 )
$91.85
Summit Bucks
Sonnax automatic transmission case bushings are made to locate the carrier output shaft assembly. These bushings are a direct OE replacement. Sonnax automatic transmission case bushings are made from high-quality materials and is a required part in any high-quality rebuild.
( 14 )
$58.94
B&M kickdown switch kits are perfect for use when swapping out a TH350 or TH700R4 for a TH400. These kits mount to the factory throttle cable bracket for easy kickdown control.
( 43 )
$97.69
Pioneer SFI certified flexplates are machined from high-strength 0.130 in. steel that exceeds factory specifications. They feature bolt patterns punched from OEM blueprints to ensure exact fitment and ring gears that are double-welded for maximum reliability and strength. All of the flexplates are fully inspected and use a dichromate finish to resist corrosion. If your application requires an SFI flexplate, order the Pioneer replacement recommended for your year, make, engine and transmission.
( 66 )
$83.99
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$88.99
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