Toyota Tundra Quick Reference Manual page 306

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Before towing
Check that the following conditions are met:
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Ensure that your vehicle's tires are properly inflated. (→P. 666)
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Trailer tires should be inflated according to the trailer manufacturer's rec-
ommendation.
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All trailer lights work to be legal.
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All lights work each time you connect them.
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The trailer ball is set up at the proper height for the coupler on the trailer.
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The vehicle remains level when a loaded or unloaded trailer is hitched.
Do not drive if the vehicle is not level, and check for improper tongue
load, overloading, worn suspension, or other possible causes.
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The trailer cargo is securely loaded.
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The rear view mirrors conform to all applicable federal, state/provincial or
local regulations. If they do not, install rear view mirrors appropriate for
towing purposes.
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Depress TOW/HAUL button (if equipped)
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Break-in schedule
If your vehicle is new or equipped with any new power train components
(such as an engine, transmission, differential and wheel bearing), Toyota
recommends that you do not tow a trailer until it has been driven for over 500
miles (800 km).
After the vehicle has been driven for over 500 miles (800 km), you can start
towing. However, drive the vehicle at a speed of less than 50 mph (80 km/h)
when towing a trailer for another 500 miles (800 km). In addition, avoid full
throttle acceleration.
Coupler
Trailer ball
I n f o r ma t i o n P r o v i d e d b y :
2-5. Driving information
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