Quick Answer: What is the best transmission for a LS swap?

One of the most common transmissions for an LS swap is the 4L60E, and for a few reasons. It’s a proven strong and dependable transmission and it’s also what came as the original automatic transmission backing up a good majority of LS engines out there.

Can you use a 700R4 with a LS motor?

We also recommend that you replace your torque converter. It is not necessarily required. But, the power band of the LS engine is different than the one you are replacing. You may need a different stall speed.


Transmission Model Common Converter Bolt Pattern
Powerglide 10.750 in.

What transmission goes with a 6.0 LS?

The 6.0-liter Vortec with a 4l80E transmission is the only Gen III/ IV engine that accepts an early GM transmission without a flexplat adapter or spacer.

Will a TH350 bolt up to a LS?

“The TH350, TH400, and Powerglide are a direct bolt-on for an LS engine,” explains TCI’s Winstead.

Is an LS Bellhousing the same as SBC?

The LS series motors have one more bolt attaching them to the bellhousing which is the design change you head about. The extra bolt is at the top of the housing and you can just leave it out, the rest of the bolt holes are the same.

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Can any transmission work with any engine?

In theory: yes. A custom adapter plate can theoretically allow any engine to match up to another transmission. However if you mismatch the power ratings of the two (massive V8 to a manual transmission of a 90’s Civic) you’re likely to shred the transmission very quickly.

How much HP can 4L60E handle?

The Stage 3 Black Edition 4L60E (rated to over 1,000 horsepower) pencils out around $4,800 with a one-year warranty (extended warranties available).

What is the difference between 6L80 and 6L90 transmission?

The 6L80 has a maximum RPM limit of 6500 RPM. The 6L90 transmission is slightly longer and taller than a comparable configuration 6L80 due to it’s beefier internals. … The 6L90 flexibilty extends to the clutches where the 6L90 has one more clutch plate than the 6L80 in each clutch for heavy duty applications. “

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