If I add a winch and/or bumper to the front of my jeep.  How much drop should I expect and what should I do about it? Adding any substantial weight to your jeep is guaranteed to reduce the ride height.  How much is going to depend on the spring rate, your specific application, and your aftermarket parts.  However, a general rule of thumb is anywhere from 1/2 to 1″ of drop can be expected from this type of situation.  A simple fix is to purchase some 3/4″ coil spacers like these: http://zoneoffroad.com/product-acc?ki=132&gr= to compenate for the additional weight.  Also listed on that link

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