Complete, 6L80 Transmission Package

The 6L80 is one in a long line of impressive automatics that we build here at Novak and we enjoy building them. The 6L80 was the defacto automatic found in Corvettes, Suburbans, trucks and other durable platforms for nearly two decades at GM. They now constitute one of the most sought-after transmissions for Jeeps.


6L80 Turn Key Overhead

Featuring a terrific low first gear (4.02:1) and a double overdrive (0.67:1), the 6L80 meets Jeep owners with broad usability, from low-range crawling to high-speed freeway trips to the trailhead.

The 6L80 is built on the heritage of the TH400, 700R4, 4L60E, etc and improves on the qualities of its predecessors. Every Novak 6l80 build starts with a select 6L80 core transmission. It gets carefully disassembled and is deep-cleaned and inspected before assembly. We then replace any questionable components with factory or better replacements and upgrades, depending on the customer's chosen build level. New clutches, seals, bushings, bearings, and gaskets are assembled to specs that exceed later model years' OEM V8 levels.

LubeGuard additive is included for longevity and shift quality and each package includes the new dipstick and tube.

One great advantage is that we can install the appropriate Novak transfer case adapter and output shaft during the build. This saves you having to open up the transmission to install the output shaft or paying to have it done. That along with our package discounted price, it saves you time, money and potential problems. Transmission to engine adapters (if necessary) are available and in addition to the pricing as listed below. Please inquire.

Applications & Compatibility

Factory Style Build vs. Adapted Build

Our factory style builds are OEM style replacement transmissions using the applicable GM output shaft, but that may require the use of the vehicle owner's original tailhousing (either 2wd or 4wd) to complete the installation.

Adapted builds are designed primarily for installation into Jeep vehicles and include the installed aftermarket Novak output shaft, adapter kit and urethane crossmember rear mount, as indicated for the customer's scenario.

Transfer Case Adaptability

6L80 adapted to a Jeep NP 231

your 6L80 can be ordered ready to join (or joined) to the following Jeep transfer cases:

We can do a full rebuild of your transfer case if you ship it to us or we will build you one from our collection. Many upgrades components are available. It will be pre-installed to the transmission and ready to install in your Jeep.

Pricing below includes a standard stall torque converter. Higher stall units (2000+) are available for an additional charge.

Level I, $3,580. ($4,120., adapted)

Our "Stock Plus" transmission that meets or exceeds the factory original version integrating a few key improvements over the originals. Recommended for engines up to 425 HP and 425 ft. lbs. torque. All components upgraded to late model V8 specs including and additionally:

  • Dura-Bond bushing kit
  • New thrust bearings
  • Hi-Per Blue bonded pistons
  • Sonnax Zip Kit
  • Raybestos frictions
  • Quality filter
  • Dipstick
  • OE converter (up to 2000 stall)
  • Converter bolts

Level II

Level II 6L80 transmissions are built to order. Contact us and we'll discuss your needs and wishes.

Compatible Engines

A 6L80 installation is typically done in conjunction with a Generation IV GM engine conversion into the Jeep. These engines include the GM V8, from 2007+. Though Gen. IV installs are much more prevalent, Gen II and Gen I motors installations are possible but will require the use of a separate transmission computer controller which may add significantly to the expense of the total installation.

We can also integrate your 6L80 into a full TurnKey powertrain package with engine, transmission, transfer case and controls all assembled, tested and ready to install in your vehicle.



6L80 passenger side for Jeeps

your transmission package is palleted, wrapped, fully insured and ready to bolt into your application. Novak will seek the best competitive shipping rates with our extensive trucking networks. It will arrive at a location of your choosing, though we strongly recommend a business location with a dock / forklift for delivery, as residential and liftgate fees can add up to an extra $100. per delivery.


This transmission is not covered under our standard warranty if it is controlled by any Holley controller.

How to Order
Because of the many variations involved, we encourage you to contact us directly by phone or e-mail. We will help you put together your transmission to best fit your requirements.