Q: Can a 42re transmission hook up to a 5.9 L Magnum gas engine

asked by on

I have a 2000 Dodge Ram 1500 4 wheel drive sport edition it currently has a 42re transmission in it but the dealership says it is supposed to have a 46re transmission in it so is it possible to hook a 42re transmission to a 5.9 liter V8 there is a sticker on the transmission with a part number and that part number comes up as a 42re I gave the dealership the last 8 digits of my VIN number and it is not supposed to have that transmission how would you interchange those would it be a direct fit or has something been modified
My car has an automatic transmission.

The 42RE will "fit" but it is definitely not a "direct" fit as in a catalog interchange. The 42RE is a light duty vehicle transmission and thus the torque rating (power handling capability) is lower than that of the 46RE. The 42RE is not intended to be used with a large 5.9L engine. The gear ratios (first and second) are different in the two transmissions and it is likely that a different torque converter was used when the swap was made. I would not be able to render a guess as to whether the PCM was somehow re-programmed. Due to the difference in the gear ratios, I would wonder if and how the transmission shift points (and shift feel) has been affected compared to the original transmission. If you are looking for a 46RE core to rebuild, in order to restore the vehicle to OEM, such can be obtained via on-line seaching at Car-Part.com. There are lots of them there. If you are interested in a transmission replacement, or rebuilding services, YourMechanic professionals in certain locales can assist with that. Please simply inquire based on your locale. If you have further questions or concerns, do not hesitate to re-contact YourMechanic.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Can a 42re transmission hook up to a 5.9 L Magnum gas engine

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: engine wont start, and when it tries it is sluggish

Claimed by Jeff Engstrom

Q: Serpentine belt/Water Pump?

This is typically a sign that a bearing has failed inside the water pump. When the bearing fails it allows the shaft that drives the pulley to move around, and is probably what is causing the belt to be thrown....

Q: broken exhaust manifold bolt.

If you haven't done this before, I highly recommend taking it to someone who has experience with broken bolt removal. This is a process that requires experience or the results can be very bad. When a newer technician is taught...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...