Can you shift a 4Runner into 4WD while driving?

Yes—on most Toyota 4Runners you can shift into 4WD while you’re moving, but the rules depend on the specific 4x4 system in your model. In general, you can engage 4H when traction is uncertain and you’re moving at low to moderate speeds if your truck uses a part-time transfer case, while 4Lo usually requires coming to a stop and shifting in neutral before engaging the low-range gear.

Understanding the 4WD systems in a 4Runner

Different model years and trims use different transfer-case configurations. Some 4Runners rely on a part-time 4WD system with 2WD/4H/4LO options, which is best used on loose or slippery surfaces and not on dry pavement for extended periods. Others offer a fuller-time or auto-mode 4WD that can engage on the move with a center differential. Always consult your owner’s manual for your exact configuration and the recommended procedure.

Engaging 4WD High (on the move)

If your 4Runner is equipped with a 4WD High setting and the system supports on-the-move engagement, follow these guidelines to shift while driving.

1. Ensure the road surface is not completely dry and that traction is uncertain (e.g., snow, wet gravel, or mud). Avoid using 4H on dry pavement for extended periods.


2. Maintain a steady speed and gentle steering inputs as you prepare to engage 4H.


3. Move the transfer-case control from 2WD to 4H according to your model’s method (lever or electronic switch). If the vehicle is equipped with a traditional transfer lever, briefly pause your forward motion or follow the manual’s recommended method for on-the-fly engagement.


4. Smoothly accelerate as you complete the shift and monitor for any unusual binding or vibrations. If you hear grinding or feel binding, stop and revert to 2WD and recheck the system.

Because some 4Runners include an on-demand or auto-mode 4WD, the interface and behavior can vary. Refer to your specific manual to confirm whether “4H Auto” or “4H” is intended for on-the-fly use and at what speeds.

Engaging 4Lo (low-range)

Low-range operation is designed for steep climbs, deep sand, or heavy mire and typically requires coming to a stop. Use these steps when you need to engage 4Lo.

1. Bring the vehicle to a complete stop on level ground if possible, or at least come to a near standstill.


2. Shift the transmission to Neutral (N). Some models may require the brake to be applied and the vehicle stationary.


3. Move the transfer-case control to 4Lo (low-range). Wait for the 4Lo indicator light to confirm engagement.


4. Once 4Lo is engaged, slowly release the brake and proceed at a very low speed, avoiding abrupt throttle inputs until the system stabilizes.

Note that some 4Runners with newer or different configurations may require additional steps or use a push-button/selector; always follow the procedure in your owner’s manual for 4Lo engagement.

What to watch out for when shifting 4WD

Shifting between drivetrain modes is not universally identical across all years and trims. The following cautions apply broadly to most 4Runner models with part-time 4WD and low-range gears.

• Use 4H on loose or slippery surfaces; avoid prolonged driving in 4H on dry pavement to prevent drivetrain binding.


• 4Lo should generally be accessed only after stopping and shifting the transfer case, then moving slowly in low range to prevent damage.


• If you hear unusual noises, feel binding, or notice the vehicle pulling to one side, stop and recheck the mode. Do not force the shift beyond its intended range.


• Some models feature 4WD Auto or full-time 4WD. In those systems, you may be able to drive on dry pavement with a center differential, but you should still follow the owner’s manual and avoid abrupt transitions.

In all cases, consult your exact model-year manual for the approved procedures and speed ranges, as the interface and requirements can vary across generations.

Summary of key takeaways

Understanding your 4Runner’s specific 4WD system is essential. On many models, you can shift to 4H while driving on slippery surfaces, but 4Lo usually requires the vehicle to be stopped or nearly stopped. Always prioritize smooth, gradual inputs and refer to the owner’s manual for your exact configuration. Proper use of 4WD enhances traction, but improper use can cause driveline binding or damage.

Bottom line

Yes, you can shift into 4WD while driving in many 4Runner configurations, especially for 4H on loose surfaces. For low-range 4Lo, plan to stop and engage as directed by your manual. When in doubt, err on the side of caution and consult the manual for your specific model year and trim level. A well-informed shift can improve traction without risking drivetrain damage.

Further reading and safety notes

For readers seeking more detail, check your 4Runner’s owner’s manual or speak with a Toyota service professional about your exact model year and drivetrain configuration. Regular maintenance and correct operating procedures help ensure 4WD systems function as intended when you need them most.

Kevin Bennett

Company Owner

Kevin Bennet is the founder and owner of Kevin's Autos, a leading automotive service provider in Australia. With a deep commitment to customer satisfaction and years of industry expertise, Kevin uses his blog to answer the most common questions posed by his customers. From maintenance tips to troubleshooting advice, Kevin's articles are designed to empower drivers with the knowledge they need to keep their vehicles running smoothly and safely.