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  • JP Magazine
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Big-Time Gear Shifting

Posted in How To on October 29, 2004
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The NV5600 tranny is one bitchin' piece of equipment. With six forward gears, including a 5.63:1 granny low and an 0.73:1 overdrive, bombproof internals, and the ability to safely suck 600 lb-ft of torque, it dwarfs the NV4500 not only in coolness, but also in size, strength, and weight.

Since the NV5600 debuted in V-10 and 5.9L Cummins-equipped Dodge trucks, a lot of people who run healthy big-blocks, tow heavy loads, or need that extra "in-between" gear to more easily climb steep grades have wanted to run the big six-speed in place of the NV4500. Unfortunately, since the bellhousing is an integral part of the transmission front cover, the only way you could put an NV5600 in your rig was to swap in a 5.9L Cummins or 8.0L V-10 as well. That is, until now.

Jim McGean of Dynatrac recently contacted us to let us know his company was working with JB Conversions and Anaheim Gear to produce a replacement front cover for the NV5600 as well as adapters that would allow an NV5600 to be used with popular fullsize drivetrains.

Although it may seem like the killer swap for everyone, with a length of 25.88 inches, you can forget installing this thing in a Jeep. For that, you'll want an NV4500. The Dynatrac NV5600 conversion components include a new transmission front cover, a pilot ring, a bellhousing adapter plate, a transfer case adapter, and a list of part numbers you'll find useful in completing the swap, such as clutch components and miscellaneous pieces. Here's the lowdown.

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Huntington Beach, CA 92647
JB Conversions
Sulphur, LA 70664
Anaheim Gear

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