Question about 2008 Ford F 250 Super Duty 4WD

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Is there a maximum speed for high 4x4 on the 2008 f-150 supercrew?

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Let common sense be your guide. 4HI puts power to the front and rear wheels at the same ratio as in 2wd for gear selected, allowing for better traction at higher speeds. 4LO puts power to the wheels at a ratio for more torque to the wheels.Just remember that all 4 tires are pulling so handling may be alittle different.

Posted on Jan 05, 2009

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I can give you a few tips on this but you need to check the specifics for your low and high A/C pressure switches. The 45 sounds slightly high.

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There are some other products you can use to clean the coils and such. A foaming product is sold at stores like Lowes or Home Depot. Theory is it works like shaving cream, expanding in the fins and pulling dirt out. You then flush with water. Check label warnings for use on different metals.

Find out when the cut-out switches are suppose to activate and what your recommended switch thresholds are. Hope this helps.

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