Concerned about a transmission swap? Our engine transmission compatibility checker will help confirm what you need to make it happen.

Transmission Interchange List Chevy, Ford, Mopar V8 Compatibility

This resource contains a transmission pan shape ID chart and other tips to help with identifying GM transmissions.

How to Identify GM Transmissions | 700R4, TH350, 4L60, TH400, 4L80e, Powerglide, & More

Over several generations of small block Chevy (and big block Chevy) engines there have been several changes that dictate what flexplate works with them. We’ll help you determine the correct flexplate for your Chevy engine in this buyer’s guide.

Small Block and Big Block Chevy Engine Flexplate Guide

Decode small block Chevy engine suffix codes and block casting numbers with our SBC decoding info guide. Learn how to find and decipher your small block Chevy engine codes quickly and easily!

Chevy Small Block Casting Numbers

The 700R4 is a great choice when it's time to upgrade your classic car or truck with an overdrive transmission. Here's what you need to know about GM's famous 4-speed automatic.

700R4 Transmission Complete Guide | Diagrams, HP Ratings, FAQ

Identify SBC heads using casting numbers, style tips, and year-by-year guides for your small block Chevy engine projects

Small Block Chevy Head Identification Guide | Casting Numbers Explained

The 4.8 LS engine is a salvage yard bargain vs the typical 5.3 or 6.0 LS and can still make great power for your LS swap needs.

Vortec 4.8 LS Build: Horsepower Recipes, Specs, & Upgrades

The 1964 Corvette L79 327 is legendary, learn more about this storied engine and what you need to build a clone.

Chevy L79 327 Engine I History, Specs, & Build Ideas

If you're ready to swap an LS engine into you '73-'87 Squarebody Chevy or GMC truck, here's a guide to get you started and a parts list to help you get everything you need for your swap.

Squarebody LS Swap Guide | 73-87 C10 Parts List

In this Tech Tip, John advises a customer on the parts needed to slip a small block Chevy engine in his 1953 Chevy 3600.

Small Block Chevy in a 1953 Chevy 3600

Engine Family Facets

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Corvette C3 Small Block Chevy TH400 Transmission Parts

Corvette C3 Small Block Chevy TH400 Transmission Parts | Speedway Motors

Shop Corvette C3 Small Block Chevy TH400 Transmission Parts and get Free Shipping on orders over $199 at Speedway Motors.

Chevy Flywheel Cover Bolt Kit TH350/400, Stainless Steel

MFG. Part #

TH350, TH400

Chevy-to-BOP GM Turbo-Hydramatic Transmission Adapter Plate

Material Type

Sold in Quantity

Notes

Hardware Included

Overall Width

Overall Thickness

Finish

2004R, 700R4, TH350, TH400, 15.750" Overall Width

G Force RCC3-400 Transmission Crossmember, 1968-81 Corvette, GM-3

2004R, TH400, Steel, Powder Coated

B&M 20237 GM SFI Flexplate, 153-Tooth 1955-1985 GM S/B V8

Engine Balance

Tooth Count

SFI Rating

Weight

Crankshaft Bolt Hole Count

IHRA Legal

NHRA Legal

Dual Pattern

Outside Diameter

GTIN Code

Bolt Hole Pattern

700R4, Powerglide, TH350, TH400, 153 Tooth Count

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Corvette C3 Small Block Chevy TH400 Transmission Parts

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Part

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Products

Chevy Flywheel Cover Bolt Kit TH350/400, Stainless Steel

Chevy-to-BOP GM Turbo-Hydramatic Transmission Adapter Plate

G Force RCC3-400 Transmission Crossmember, 1968-81 Corvette, GM-3

B&M 20237 GM SFI Flexplate, 153-Tooth 1955-1985 GM S/B V8