Category Archives: Cummins 4BT and 6BT Issues

Is the Cummins 12 Valve 5.9L the Best Diesel Ever Built?

Early 5.9L Engine History Weighing in at 1,100 pounds this heavyweight was brought to market under the hood of the Dodge Ram in 1989. It was originally designed to power agricultural vehicles 8 years earlier and in fact was the brainchild of a Case/Cummins joint venture. The engine marketed as the 6B, 6BT, and 6BTAA…

Best 4BT Swap Transmisson Review: New Venture NV4500

NV4500 History The NV4500 and consequently the NV5600 transmissions are some of the best that have ever been produced for heavy duty trucks. These transmissions are regarded as the “gold standard” for guys doing a Jeep or Bronco 4BT Engine Swap. The NV4500 came into existence out of sheer necessity. From 1989-1993 Chrysler used the…

Common 4BT / 6BT Issues The Cummins 4BT and 6BT engines are widely known to be bulletproof. If there is an engine out there that old school guys always go to is the older mechanical 4BT Cummins. The reason these engines are still used in industrial and jeep swap applications is due to their reliability.…