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E40D Transmission Swap – Hot Rod Hauler

Press June 17th, 2025 1 minute read

Check out this E40D transmission swap on this 1973 Ford f350. Read more only at www.customclassictrucks.com, the official website for Custom Classic Trucks...

6L80 vs 6L90: Devil's in the Details

6L80 vs 6L90: Devil's in the Details

Press June 17th, 2025 6 minute read

The 6L80 and 6L90 are two of the most popular rear-wheel transmissions from General Motors. So many things have been discussed about these remarkable...

6L80E and 6L90E Transmission Specs and Identification

6L80E and 6L90E Transmission Specs and Identification

Press June 17th, 2025 6 minute read

The 6L80E and the 6L90E are close enough that people mix them up constantly, and different enough that putting the wrong one in a heavy truck is an...

Sports Cars That Are Faster with an Automatic Performance Transmission

Sports Cars That Are Faster with an Automatic Performance Transmission

Press June 17th, 2025 6 minute read

Some luxury cars with automatic transmission include the Lexus ISF, BMW M4/M5, Audi S6/S8, and Porsche Panamera, to mention a few. Since there are two...

Ford C4 and C6 Transmissions: What Are the Differences?

Ford C4 and C6 Transmissions: What Are the Differences?

Press June 17th, 2025 7 minute read

Ford's C4 and C6 3 speed automatic transmissions are similar in operational characteristics; however, there are still unique differences between the C4 and...

545RFE Transmission Specs and Schematic

545RFE Transmission Specs and Schematic

Press June 17th, 2025 6 minute read

The 545RFE transmission is an electronically controlled unit that was great for its time until it was replaced bu the 65RFE and 66RFE. Read below for...

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