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Automatic Transmission Cases

The gearset of your automatic transmission is surrounded by a protective case made of iron or aluminum. Corrosion or damage may require a replacement for your stock...

The gearset of your automatic transmission is surrounded by a protective case made of iron or aluminum. Corrosion or damage may require a replacement for your stock case, and if you’re making upgrades for competition, you may need a beefed-up case for safety.

Top Brands

Stabilizing your high-performance engine is an important job, so you should go with a name brand you trust, instead of some third-party reseller. Summit Racing Equipment sells rocker arm stud girdles from manufacturers like COMP Cams, Harland Sharp, Trick Flow Specialties, Lunati, Howards Cams, and more.

The gearset of your automatic transmission is surrounded by a protective case made of iron or aluminum. Corrosion or damage may require a replacement for your stock case, and if you’re making upgrades for competition, you may need a beefed-up case for safety.

Top Brands

Stabilizing your high-performance engine is an important job, so you should go with a name brand you trust, instead of some third-party reseller. Summit Racing Equipment sells rocker arm stud girdles from manufacturers like COMP Cams, Harland Sharp, Trick Flow Specialties, Lunati, Howards Cams, and more.

Part Groups

Results 1 - 9 of 9

Reid Racing Powerglide Transmission Cases

Reid Powerglide transmission cases are perfect for drag race high-horsepower applications. They are made by a permanent mold process from heat-treated aircraft-grade aluminum, making them stronger and more ductile than OEM castings. Features include: * Thickened oil pan flanges * Beefed-up oil pump area * Heli-coiled oil pump mounting holes * Adjustable trans-brake release * Redesigned oil passages * Reverse piston bleed hole * SFI-approved safety liners for flexplate and transmission

5.0 out of 5 stars ( 7 )

$1,228.96

$1,459.00

Reid Racing Super 80 Transmission Cases

Redesigned and strengthened, Reid Racing Super 80 transmission cases address weaknesses and add features that improve every aspect of the 4L80e. They build the Super 80 cases with full 360 degree internal case "lugs" that retain the center support and pressure plate. Not only are they lightweight and offer minimal drag, but their abuse tolerance has been kicked up several notches to handle high-horsepower levels without ending up with a ruined transmission. Reid Super 80 cases are massively tough, ductile, and leak-free with the strength to handle turbocharged muscle cars, drag cars, rock crawling, and desert truck racing. Their modular, 2-piece design allows them to be used with popular engines by simply changing bolt-on Superglide bellhousings. Reid Racing Super 80 transmission cases are SFI 4.1 certified without requiring any external shields. Features: * Improved billet steel pressure plate * Oversized snap ring * Longer band anchor pins captured by oversize bosses * Multiple external pressure taps allow for monitoring of circuit pressures * Heli-coiled bellhousing and oil pump threads * Front band anchor tapped for custom ARP anchor bolt (supplied) * Input and output speed sensors--bosses are dual machined to accept freeze plugs * Oil line ports machined for -AN fittings * Pre-machined with additional stud/nut clearance for Advance Adapters transfer case adapters

5.0 out of 5 stars ( 2 )

$2,318.00

Summit Racing™ TH400 Transmission Cases

Summit Racing™ TH400 transmission cases are a street/strip version of the TH400 aftermarket SFI transmission case. The bellhousing is not included and must be purchased separately. A direct replacement for the GM case, Summit Racing™ cases use a permanent mold casting to increase the case wall thickness, making it sufficient to pass SFI 4.1 certifications without the need for any external shields or internal liners. The 2-piece design allows them to be used with all popular engines by simply changing bolt-on bellhousings. Features include: * Speedometer and governor provisions * Longer band anchor pins captured by oversize bosses * Multiple external pressure taps allow for monitoring of circuit pressures * Accepts all style oil pumps, including 8-bolt and vari-pitch designs * Heli-coiled bellhousing and oil pump threads * Pre-machined to fit larger custom planetary gear carriers

3.0 out of 5 stars ( 2 )

$1,899.99

Reid Racing Super Hydra 400 Transmission Cases

Redesigned and strengthened, Reid Racing Super Hydra 400 transmission cases address weaknesses and add features that improve every aspect of the Turbo 400. They build their Super Hydra 400 cases with full 360 degree internal case "lugs" that retain the center support and pressure plate. Not only are they lightweight and offer minimal drag, but their abuse tolerance has been kicked up several notches to handle high-horsepower levels without ending up with a ruined transmission! A direct replacement for the GM case, Reid cases use an incredibly expensive permanent mold casting technique to increase the case wall thickness, making it sufficient to pass SFI 4.1 certifications without the need for any external shields or internal liners. Super Hydra 400s are massively tough, ductile, and leak-free—with the strength to handle rock crawling, as well as desert or short-course truck racing. Their modular, 2-piece design allows them to be used with all popular engines by simply changing bolt-on Superglide bellhousings. Reid Racing Super Hydra 400 transmission cases are offered in drag/street and off-road versions, each with features geared specifically for those applications. Features: * Speedometer and governor provisions * Improved billet steel pressure plate * Oversized snap ring * Longer band anchor pins captured by oversize bosses * Additional dipstick hole on driver side * Multiple external pressure taps allow for monitoring of circuit pressures * Accept all style oil pumps, including 8-bolt and vari-pitch designs * Heli-coiled bellhousing and oil pump threads * Pre-machined to fit larger custom planetary gear carriers Off-road also includes: * Pre-machined side oil feed feature for 4L80-E center support * Front band anchor tapped for custom ARP anchor bolt (supplied) * Pre-machined bosses for input and output speed sensors * Un-machined speedometer boss for maximized 4x4 transfer case load support * Oil line ports machined for -AN fittings * Pre-machined with additional stud/nut clearance for Advance Adapters transfer case adapters * Available with a 4L80-E size pressure plate

5.0 out of 5 stars ( 4 )

$2,148.99

$2,282.94

Transmission Specialties Powerglide SFI One-Piece Aluminum Transmission Cases

Transmission Specialties' Powerglide SFI one-piece aluminum transmission cases are SFI certified for Powerglide transmissions. They were developed to eliminate all weak points found in the original GM transmission case. Cast from 356-T6 aluminum and precision machined to rigorous specifications, these cases are SFI-approved for competition use. The case also features steel safety inner liner, thus, eliminating the need for any external shields.

4.5 out of 5 stars ( 2 )

$995.00

J.W. Performance Ultra-Case Powerglide Transmission Cases

Strength and rigidity are the keys to any foundation, which is why J.W. Performance developed the Powerglide transmission Ultra-Cases. Most engine builders would not build a high-horsepower race engine in a stock block, so why build a race Powerglide with a stock case? These all-aluminum Ultra-Cases are the strongest and most rigid foundations available for building your Powerglide. Designed to be used with the J.W. Performance Ultra-Bells, these cases are loaded with benefits, including improved oil passages, an adjustable trans-brake release, increased material thickness in critical areas eliminating case breakage, and they fit under stock floors. J.W. Performance Ultra-Case Powerglide transmission cases are SFI-certified, so there is no need for an external transmission shield.

Not Yet Reviewed

$1,289.93

ATI SuperCase TH400 Transmission Cases

ATI aluminum TH400 SuperCases feature SFI certification and a bellhousing. Developed to eliminate all weak points found in the original TH400 case, the rugged SuperCases and bellhousings are SFI-approved for competition. In addition, the SuperCases have a removable bellhousing that bolts directly to the case instead of using the pump bolt locations. They have been engineered to accept all internal TH400 components.

5.0 out of 5 stars ( 1 )

$2,010.99

$2,355.99

Clearance

ACDelco Automatic Transmission Cases

ACDelco original equipment automatic transmission cases are factory-recommended replacement components. They will provide the same performance, durability and service life you expect from General Motors. Order the case designed for your transmission application.

Not Yet Reviewed

$216.99


$29.50

$386.99

TCI Reid Racing Powerglide SuperCases

These TCI high performance SuperCases, manufactured for Powerglides, eliminate the flex and cracking problems that plague the OEM case design. Reid Racing SuperCases are strong, high-quality, machined units that provide consistent trans-brake release, less component wear, cooler operating temperatures, and less binding. These transmission cases include a SFI 30.1 certification, so there's no need to run an external transmission shield.

Not Yet Reviewed

$1,783.95

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