How much power can a 4BT handle?
Robert Miller
Published Feb 14, 2026
How much power can a 4BT handle?
In our experience, the 4BT’s stock rotating assembly—which was only subjected to 105 hp in factory form—can handle up to 400 horsepower and 800 lb-ft of torque without breaking a sweat.
Will a 4l80e hold up to a Cummins?
You can adapt a 4l80 to a Cummins and the Gm Transmission | E-TransControl has a Controller for $400.00. I’m using there Controller for my 47re in my Blazer. The 47’s and 48’s transfercases are a drivers side drop. I’d do a upgraded torque converter on the 4l80 if you was to use it.
How much does a 4BT Cummins cost?
To be sure, deals can still be found in some instances, but the cat is definitely out of the bag on the 4BT Cummins. For most running take-out engines, you’re looking at $1,500 to $3,500, and if you come to find out the engine needs an overhaul after the sale things can get expensive—fast.
What is a 4BT Cummins?
The 3.9L 4BT Cummins is a diesel turbocharged engine that utilizes an inline 4-cylinder design. The acronym, 4BT, means four-cylinder, “B” series turbocharged. It shares many of the same components as the 6BT Cummins, the 12-Valve 5.9L Cummins engine found in the 1st Generation Cummins.
What transmissions bolt up to a 4BT?
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.
Which is better 4BT or 6BT?
4bt is lighter and smaller but can rattle a bit. 6bt has more power, no rattle but larger in size and weight.
What Allison Transmission will bolt to a 5.9 Cummins?
The G Force Cummins to Allison Adapter Plate and Flexplate Kit accommodates 1989-2002 Cummins 6BT, or 5.9L engines bolting to an GM Allison 1000 automatic transmission for model years 2001-2007, or with the LT Duramax bellhousing pattern.
What is a 12v Cummins?
The 12-valve Cummins, officially the Cummins 6BT, is the engine at the bottom of the family tree of diesel engines (at least in pickup trucks). Its simple, straightforward design is a symbol of reliability, solid engineering and tractor-style torque.
Is the Cummins 4BT a good engine?
The 4BT engine is a workhorse and is nearly bulletproof. The Cummins 6BT has continually been claimed as the most reliable diesel engine to ever be built. Considering the 4BT is built with the exact same 6BT parts, these engines are just as reliable and dependable.
Are all NV4500 transmissions the same?
Dodge 4wd NV4500 transmissions have always maintained the same gear ratios and bolt patterns throughout production; however, variations occur between diesel (and V10) versus gas models.
How much does a Cummins 4BT weight?
750- 780 pounds
The 4BT engine weighs 750- 780 pounds, which is heavier than most of the gas engines it would replace in a conversion project, but much lighter than the sixcylinder 6BT version. The inlinefour also offers a fairly compact size at just 30.6 inches long and 37.7 inches tall, which is useful with space constraints.