What transmission is a 46RE for?

The 46RE is a four‑speed automatic transmission from Chrysler used in rear‑wheel‑drive and some four‑wheel‑drive vehicles, typically paired with V8 engines in late‑1990s Dodge Ram trucks and related SUVs.

What the 46RE is

The 46RE is part of Chrysler’s line of electronically controlled four‑speed automatics. It features overdrive, electronic shift control, and a locking torque converter to improve fuel efficiency and towing capability. Built to handle moderate to heavy torque, it sits in the family of RE transmissions but is configured for higher loads than lighter duty variants.

Where it was used

The 46RE was installed in several Chrysler‑brand trucks and SUVs during the late 1990s and early 2000s. The applications were primarily V8‑powered, rear‑wheel‑drive platforms, with some four‑wheel‑drive configurations.

Typical platforms include the following (year ranges can vary by market and option):

• Dodge Ram pickups with V8 Magnum engines (notably 5.2L and 5.9L)


• Dodge Durango SUVs equipped with V8 powertrains


• Some Jeep Grand Cherokee variants offered with compatible V8 setups

Note: Exact fit depends on year, transmission code, and drivetrain configuration. For a precise match, consult the vehicle’s service data or a parts catalog and verify the transmission stamp on the case.

Key features and maintenance considerations

Key characteristics include an electronically controlled shift system, overdrive gearing, and a locking torque converter. Common maintenance considerations include timely fluid and filter changes and ensuring the valve body and solenoids are in good working order. Rebuilds or replacements should use 46RE‑specific components to ensure proper fit and operation.

Conclusion

The 46RE served as Chrysler’s reliable four‑speed option for V8‑powered rear‑wheel‑drive applications in the late 1990s, balancing simple gearing with electronic control to support towing and daily driving in trucks and SUVs.

Summary

In short, the 46RE is a four‑speed automatic transmission used primarily behind V8 engines in late‑1990s Dodge Ram trucks and related SUVs, designed for rear‑wheel drive with some four‑wheel drive variants, and featuring electronic control and an overdrive. Always verify the exact fit with VIN, build date, and transmission code.

What's the difference between a 46RE and a 48re?

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Is the 46RE a good transmission?

The 46RE transmission is not inherently a bad transmission, but it has common failure points, primarily related to the overdrive direct snap ring and the valve body's nylon check balls that can cause overheating and loss of reverse. However, it is known for being a durable and capable transmission, especially when built for higher horsepower and with aftermarket performance upgrades, as it is a precursor to the more robust 47RE/48RE and has extensive aftermarket support. 
Common issues

• Loss of reverse gear: Often caused by a broken overdrive direct snap ring or reverse band strut, or incorrect clutch clearances. 
• Overheating: Nylon check balls in the valve body can swell and block cooler lines, leading to transmission overheating and potential damage to the snap rings. 
• Overdrive housing: In 4WD models, the overdrive housing can break if there are driveshaft or U-joint failures. 

Strengths

• Durability: When properly built and maintained, the 46RE can handle significant abuse. 
• Aftermarket support: It has a large aftermarket, with performance upgrades available to improve durability and shift performance. 
• Simplicity: It is essentially a 727 transmission with an overdrive, making it simpler and lighter than some later models. 

Recommendations

• Proactive maintenance: Regularly replace the fluid, filter, and install an auxiliary transmission cooler to help prevent overheating. 
• Address known issues: Consider rebuilding with a Sonnax piston and high-performance clutches and bands to address common failure points. 
• Be cautious with fluid changes: On high-mileage or neglected transmissions, a fluid and filter change may be more likely to cause problems than fix them, as the "grit" may be holding it together. Consult a transmission professional if this is the case. 

Are all 46RE transmissions the same?

No, not all 46RE transmissions are the same; there are differences based on the vehicle's model year and specific application, particularly regarding their electrical connectors and internal components. For example, the electronic connectors changed between 1999 and 2000, and the 2002 model year has a different large, square connector that is not compatible with earlier models. You must use the transmission's electronics from the vehicle it is being installed in to avoid shift codes. 
Key differences in 46RE transmissions

• Electrical connectors: The main electrical connectors changed over the years. 
  • 1996–1999 models have a different connector than later years. 
  • 2000–2001 models have another variation. 
  • 2002 models have a unique large, square connector and are not interchangeable with earlier years. 
  • It is essential to use the correct electronics from the donor vehicle to match the computer, or you will get shifting errors. 
• Internal and external components:
  • Torque converter: The torque converter may differ depending on the engine size (e.g., 5.2L vs. 5.9L). 
  • Neutral safety switch: The neutral safety switch can vary, so check the case for the correct threaded bosses. 
  • Vehicle-specific parts: Transmissions from different vehicles (like a Ram vs. a Dakota) might have different case or bell housing variations. 

Before swapping a 46RE transmission

• Identify the donor vehicle: Always check the year and model of the vehicle the transmission came from to ensure the correct electronic and mechanical compatibility. 
• Match electrical connectors: You must match the transmission's electronics to the year of your vehicle. This may require swapping the valve body from your old transmission onto the new one to get the correct connectors. 
• Inspect for external differences: Look for differences in the case, bell housing, and neutral safety switch before purchasing or attempting an installation. 

What vehicles have a 46RE transmission?

What vehicles use the 46RE? Popular in Dodge/Ram trucks and SUVs from the late 1990s–early 2000s.