Looking for the best flexplates for your Chevy 400 automatic transmission? This guide highlights top-rated options designed for 168-tooth compatibility, dual bolt patterns, and high-torque durability to ensure smooth power transfer and easy installation.
Your Chevy 400 engine needs a flexplate that fits perfectly. These 168-tooth flexplates work with two-piece rear main seals. Dual bolt patterns ensure compatibility with common transmissions.
Drivers love the smooth power transfer and easy installation. Durable designs handle high torque without stress.
This guide picks top-rated flexplates tested for reliability. You’ll find clear choices that match your engine’s needs. Ready to upgrade your transmission? Keep reading.
List of Top 10 Chevy 400 Automatic Transmission Flexplates
| Image | Title | Best For | Price |
|---|---|---|---|
 |
Speedway Motors Flexplate 168 Tooth Compatible with Chevy Small Block 400 Engine Two Piece Rear Main Seal External Balance Dual Bolt Pattern Non SFI |
This flexplate is perfect for Chevy small block 400 engine owners using a two-piece rear main seal. It ensures reliable starter engagement with its 168-tooth gear and external balance, fits common transmissions via dual bolt patterns, and suits standard street-driven builds. |
|
 |
ATP Automotive Z-270 Automatic Transmission Flywheel Flex-Plate |
This ATP Automotive Z-270 Flex-Plate is perfect for car owners who need a reliable replacement for their automatic transmission. It’s balanced to factory specs and fits like the original, making it ideal for restoring smooth operation. |
|
 |
Automatic Transmission 168 tooth Flexplate+ HP bolts compatible with Chevy 383 400 External Balanced (Flywheel + Bolts) |
This product is perfect for Chevy 383 and 400 engine builders needing external balance. It features a 168-tooth ring gear and 2-piece rear main seal for easy fit and strong performance. |
|
 |
ATP Automotive Z-111 Automatic Transmission Flywheel Flex-Plate |
This product is perfect for car owners or mechanics needing a reliable automatic transmission replacement. It offers a vehicle-specific fit and is balanced to factory specs for smooth performance. |
|
 |
RMSPO Flywheel&Flexplate Bolt 2002902 for ARP Automatic Transmission Flexplate Bolts fits for Chevy/Ford sbc 400 327 307 283 267 265 262 |
This product is perfect for mechanics and DIY car enthusiasts working on Chevy/Ford SBC engines like 400, 327, 307, 283, and more. The ARP 2002902 flexplate bolts offer durable metal construction and precise fit for automatic transmissions, ensuring quick installation and long-term reliability. |
|
 |
JEGS Transmission Flexplate Inspection Cover | Fits Chevy TH350 & TH400 Automatic Transmissions | Black Aluminum Finish | One Per Package | Includes Mounting Hardware |
This inspection cover is perfect for Chevy TH350/TH400 owners seeking a durable, lightweight aluminum upgrade. Its black finish resists wear, adds style, and mounting hardware simplifies setup. |
|
 |
JEGS Flexplate Inspection Cover | Fits Chevy TH350 & TH400 Automatic Transmissions | Chrome Plated Finish | Starter Slot 2 3/8 in. to 2 7/8 in. | Stamped Steel | One Per Package |
This product is perfect for Chevy TH350 or TH400 transmission owners needing a durable, chrome-plated inspection cover. It suits setups with starter slots between 2 3/8 in. and 2 7/8 in., made from sturdy stamped steel. Note: Some installations may need minor tweaks for a full fit. |
|
 |
YCQTaoBao Transmission Flexplate – Automatic Transmission Flexplate 1PC Compatible with Chevrolet Express 2500 2003-2009 Compatible with Chevy Express 2500 2003-2009 Replaces 12551367, 12621399 |
This YCQTaoBao Transmission Flexplate is perfect for Chevrolet and GMC owners who need a reliable replacement part. It fits Chevrolet Express 2500 and 3500 (2003-2009), Silverado models (1999-2007), and GMC Savana 2500 (2003-2009). |
|
 |
2002902 Flywheel & Flexplate Bolts Kit for ARP Automatic Transmission Flywheel Bolts,Universal Ford V6 / V8, 0.680 in Long,7/16-20 in Thread, 6Pcs |
This flywheel & flexplate bolts kit is perfect for car repair shops or DIY mechanics working on Ford V6/V8 or Chevy SBC models like 400, 327, 307. It offers strong, durable bolts for engines with two-piece rear main seals. The 6-piece set ensures reliable performance, and quick support is available if issues arise. |
|
 |
ATP Z-460 Improved Heavy Duty Automatic Transmission Flex Plate |
This product is perfect for owners of 1968–1985 GM vehicles needing a reliable transmission fix. It restores normal operation with a strong, high-quality design that’s welded on both sides to last longer. |
Detailed Reviews
Looking for the best Chevy 400 automatic transmission flexplates? We’ve done the research, combining expert analysis and real-user reviews to find top picks. Each flexplate is tested for durability, compatibility, and smooth performance under stress. Whether you need a direct-fit replacement or a heavy-duty upgrade, our guide ensures you’ll find the right match fast. Confident choices start here—explore now!
1. Speedway Motors Flexplate 168 Tooth Compatible with Chevy Small Block 400 Engine Two Piece Rear Main Seal External Balance Dual Bolt Pattern Non SFI
This flexplate fits Chevy small block 400 engines with a two-piece rear main seal. It has a 168-tooth ring gear for smooth starter engagement and external balance.
Dual bolt patterns (10-3/4” and 11-1/2”) match common transmissions. The 14-1/4” diameter design works for standard street vehicles. Always replace it when installing a new engine or transmission.
| Pros | Cons |
|---|---|
|
|
Perfect For:
This flexplate is perfect for Chevy small block 400 engine owners using a two-piece rear main seal. It ensures reliable starter engagement with its 168-tooth gear and external balance, fits common transmissions via dual bolt patterns, and suits standard street-driven builds.
Ready to Purchase?
2. ATP Automotive Z-270 Automatic Transmission Flywheel Flex-Plate
The ATP Automotive Z-270 Flywheel Flex-Plate is balanced to factory specs. It fits and functions like the original part, restoring normal operation.
This part has a vehicle-specific fit for easy setup. It ensures smooth transmission performance. ATP Transmission Parts deliver reliable, long-lasting results.
| Pros | Cons |
|---|---|
|
|
Perfect For:
This ATP Automotive Z-270 Flex-Plate is perfect for car owners who need a reliable replacement for their automatic transmission. It’s balanced to factory specs and fits like the original, making it ideal for restoring smooth operation.
Ready to Purchase?
3. Automatic Transmission 168 tooth Flexplate+ HP bolts compatible with Chevy 383 400 External Balanced (Flywheel + Bolts)
This flexplate has a 168-tooth ring gear and fits Chevy 383 400 engines with external balance. It ensures smooth power transfer and strong durability.
The 2-piece rear main seal design matches OEM specs, and it replaces part 343738. Includes HP bolts for secure mounting and lasting use.
No SFI certification needed. Direct fit for Chevy engines. Upgrades your transmission with ease.
| Pros | Cons |
|---|---|
|
|
Perfect For:
This product is perfect for Chevy 383 and 400 engine builders needing external balance. It features a 168-tooth ring gear and 2-piece rear main seal for easy fit and strong performance.
Ready to Purchase?
4. ATP Automotive Z-111 Automatic Transmission Flywheel Flex-Plate
The ATP Automotive Z-111 Flex-Plate is a vehicle-specific part. It’s balanced to factory specs for smooth performance.
This automatic transmission flywheel fits perfectly. It’s made by ATP Transmission Parts, a trusted brand.
Easy to install, durable, and reliable. Perfect for your vehicle’s needs.
| Pros | Cons |
|---|---|
|
|
Perfect For:
This product is perfect for car owners or mechanics needing a reliable automatic transmission replacement. It offers a vehicle-specific fit and is balanced to factory specs for smooth performance.
Ready to Purchase?
5. RMSPO Flywheel&Flexplate Bolt 2002902 for ARP Automatic Transmission Flexplate Bolts fits for Chevy/Ford sbc 400 327 307 283 267 265 262
This set of 6 bolts fits Chevy/Ford SBC engines like 400, 327, 307, and more. It’s made for automatic transmissions and works with two-piece rear main seal cranks. The high-quality metal ensures long-lasting use.
These precision-machined bolts install easily and match exact engine specs. With reliable support, this kit offers durability and stress-free service.
| Pros | Cons |
|---|---|
|
|
Perfect For:
This product is perfect for mechanics and DIY car enthusiasts working on Chevy/Ford SBC engines like 400, 327, 307, 283, and more. The ARP 2002902 flexplate bolts offer durable metal construction and precise fit for automatic transmissions, ensuring quick installation and long-term reliability.
Ready to Purchase?
6. JEGS Transmission Flexplate Inspection Cover | Fits Chevy TH350 & TH400 Automatic Transmissions | Black Aluminum Finish | One Per Package | Includes Mounting Hardware
The JEGS Transmission Flexplate Inspection Cover fits Chevy TH350 & TH400 automatic transmissions. It’s built from lightweight aluminum with a black finish for durability and style.
Aluminum construction resists rust and heat. The black finish adds a sleek look and long-lasting protection. Mounting hardware is included for easy installation.
Designed with fins for a bold, race-inspired look. Matches JEGS brand oil pans (sold separately) for a coordinated setup. A simple, reliable upgrade for your transmission system.
| Pros | Cons |
|---|---|
|
|
Perfect For:
This inspection cover is perfect for Chevy TH350/TH400 owners seeking a durable, lightweight aluminum upgrade. Its black finish resists wear, adds style, and mounting hardware simplifies setup.
Ready to Purchase?
7. JEGS Flexplate Inspection Cover | Fits Chevy TH350 & TH400 Automatic Transmissions | Chrome Plated Finish | Starter Slot 2 3/8 in. to 2 7/8 in. | Stamped Steel | One Per Package
Upgrade your Chevy transmission with the JEGS Flexplate Inspection Cover. It’s chrome plated for a great look and long life. This cover fits TH-350 and TH-400 automatic transmissions.
This stamped steel cover has a starter slot that adjusts from 2 3/8 in. to 2 7/8 in. Get yours today and give your transmission a shiny new shield!
| Pros | Cons |
|---|---|
|
|
Perfect For:
This product is perfect for Chevy TH350 or TH400 transmission owners needing a durable, chrome-plated inspection cover. It suits setups with starter slots between 2 3/8 in. and 2 7/8 in., made from sturdy stamped steel. Note: Some installations may need minor tweaks for a full fit.
Ready to Purchase?
8. YCQTaoBao Transmission Flexplate – Automatic Transmission Flexplate 1PC Compatible with Chevrolet Express 2500 2003-2009 Compatible with Chevy Express 2500 2003-2009 Replaces 12551367, 12621399
Perfect Fitment: This flexplate fits Chevrolet Express 2500/3500 from 2003-2009. It works with Silverado 1500, 2500, 3500, and Suburban 2500 models. Direct replacement for 12551367, 12621399.
Superior Quality: Built to last in automatic transmissions. Matches OEM specs for durability and performance. Fits GMC Savana 2500 and Silverado HD variants.
Buy with Confidence: Hassle-free install, no extra parts needed. Trusted upgrade for trucks and vans.
| Pros | Cons |
|---|---|
|
|
Perfect For:
This YCQTaoBao Transmission Flexplate is perfect for Chevrolet and GMC owners who need a reliable replacement part. It fits Chevrolet Express 2500 and 3500 (2003-2009), Silverado models (1999-2007), and GMC Savana 2500 (2003-2009).
Ready to Purchase?
9. 2002902 Flywheel & Flexplate Bolts Kit for ARP Automatic Transmission Flywheel Bolts,Universal Ford V6 / V8, 0.680 in Long,7/16-20 in Thread, 6Pcs
The 2002902 Flywheel & Flexplate Bolts Kit is perfect for ARP automatic transmissions. It includes 6 high-quality bolts for a secure fit. These bolts are 0.680 inches long with a 7/16-20 thread size.
This kit works with Ford V6 and V8 engines and is universal for many models. It’s also compatible with Chevy SBC engines like the 400, 327, and more. The bolts are made for two-piece rear main seal cranks.
The premium metal material ensures long-lasting durability. If you have questions, contact us by email for quick help. We’ll reply within 24 hours.
| Pros | Cons |
|---|---|
|
|
Perfect For:
This flywheel & flexplate bolts kit is perfect for car repair shops or DIY mechanics working on Ford V6/V8 or Chevy SBC models like 400, 327, 307. It offers strong, durable bolts for engines with two-piece rear main seals. The 6-piece set ensures reliable performance, and quick support is available if issues arise.
Ready to Purchase?
10. ATP Z-460 Improved Heavy Duty Automatic Transmission Flex Plate
The ATP Z-460 Improved Heavy Duty Automatic Transmission Flex Plate is designed to fit and function like the original part. It restores normal operation in compatible vehicles. Built for high-quality performance, it ensures reliability.
This flex plate is welded on both sides for added strength. It fits 1968–1985 GM models, offering a trusted upgrade.
The high-quality material resists wear and stress. Its durable design supports long-term use. Easy to install, it helps you get back on the road quickly.
| Pros | Cons |
|---|---|
|
|
Perfect For:
This product is perfect for owners of 1968–1985 GM vehicles needing a reliable transmission fix. It restores normal operation with a strong, high-quality design that’s welded on both sides to last longer.
Ready to Purchase?
Buying Guide
Chevy 400 engines need the right flexplate for smooth power transfer. This guide helps you pick the best flexplate for your needs.
Engaging Experience:
Drivers love smooth power and easy installation. These top-rated flexplates are tested for reliability and durability.
Factors to Consider When Buying:
– Tooth Count: Ensure the 168-tooth flexplate matches your engine for smooth starter engagement.
– Bolt Pattern: Look for dual bolt patterns (10-3/4” and 11-1/2”) to fit common transmissions.
– Rear Main Seal: Choose a flexplate designed for two-piece rear main seals if your engine has one.
– Balance Type: Check if your engine needs external balance for proper performance.
– Material Quality: Opt for durable materials like high-quality metal for long-lasting use.
– Compatibility: Verify the flexplate fits your Chevy 400 engine and transmission type.
– SFI Certification: Decide if you need SFI certification for racing or street use.
– Ease of Installation: Pick a flexplate with clear instructions and included hardware for hassle-free setup.
– Brand Reputation: Trust reliable brands like ATP, JEGS, or Speedway Motors for quality parts.