4l80e service manual

We have established ourselves in the industry with our exclusive innovative 4L80E valve body designs whether we use our in house recalibration kit, or one of our transbrakes, you are getting what no other company in the industry has. Our valve body hydraulics have proven themselves repeatedly and our transbrakes have set the standard for release time. We specialize in building the 4L80E for retrofit applications.

We have several upgrade options for the various stages of 4L80E. We offer two different transbrakes. Both designs will work in a stock depth pan. Our D1 transbrake, also known as the Manual Low transbrake, allows normal reverse operation but requires the gear selector to be in the 1st or low gear position to operate.

It is a very quick acting transbrake. It works very well in full manual configuration. It has some special tuning considerations for use with a controller in an automatic shift situation. Our D3 transbrake allows for transbrake operation in any forward gear range. It requires transbrake activation for reverse. It works very well in automatic computer controlled applications because the shifter can be left in D3 and the controller shifts the transmission, instead of requiring the driver to shift from D1 after launch.

All 4L80Es also include a new boost valve assembly, new shift solenoids, manifold pressure switch, internal wiring, as applicable. The Stage 3 4L80E build adds the billet input shaft and rollerized billet forward hub for applications above HP. This build will handle well over HP assuming moderate RPM range less than rpm , average or lighter weight vehicle, and no large N2O usage.

The Stage 4 4L80E adds the billet intermediate shaft. Stage 4 builds are mainly for heavy vehicles, diesel, or large uses of N2O.

We have put together the common parts used in most of these retrofits to make it easier for the customer to do so. Typically this is all you need to put the 4L80E into your muscle car aside from driveline shortening and crossmember mods or fabrication. If there came a moment when you had a question about thrust bearing, line pressure, wiring schematics, troubleshooting or codes, this is the quickest way to get your answer. There are also updated chapters about electronics, the center lube and other systems.

Their general descriptions and specific procedures for the THM 4LE make for unparalleled reference points. There are well thought out instructions that align with hundreds of images, many exploded views that break down the scenarios in manners that might even give the layman enough confidence to tackle an overhaul.

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