i have a 98 f150 that i need to replace the rear leaf springs. the ones on there only have 3 springs and i want to get 4 to carry a larger load. does anyone have the suspension code for a 98 F150 ORP cause they have 4 leafs. i need it to order the leaf springs through the ford dealer. if anyone can help that would be great. also are there any other suggestions? the most i haul is 3 dirt bikes and a small trailer with a quad. my GVWR is 6250lb. thanks

 

Don't order leaf springs through a dealer unless you want to pay an incredible amount of money. Here's a link for you... http://www.generalspringkc.com/leaf_...7-03_f150.html

BTW the OEM number will be stamped on the overload (fat bottom spring)

Edit: In case you're wondering the oem part numbers for the 3/1 leaf springs are F75Z5560CD or F75A5560CG. Ford actually built over 30 different leaf springs for the 97-03 so those are just a couple of the part numbers.

 

thank you. do you know if these leaf springs will lift the back end at all or just go back to the stock height?

 

I'd expect about 1.5-2" of lift from the 3/1 because they're all very similar to free arch of around 1-7/8" so then you factor in the increase in spring capacity which will give you the extra height. Now the HD 4/1 spring which has 2200 lb capacity is a 2-1/4" arch and will probably lift the rear around 2-1/2"

 

what do you recommend i do. i want the back end to sit a little higher than the front but not tower over it. like i said the most i will have in the back is 3 dirt bikes that adds to about 600-700 lbs.

 

For those of you with 04+ wondering what your spring capacity is I'll list some of the OEM's with spring capacity. These are for the 3/1 springs. The 2/1 springs are a 1500 lb capacity.

1500 lb capacity
4L3Z556OLA
4L345560LH

1700 lb capacity
4L3Z5560MC
4L345560ML

1900 lb capacity
4L3Z5560PA
4L345560PK

 

Give me the OEM part number on your spring which will be on the overload and I can tell you the exact capacity of your current setup and go from there

 

if you dont want to alter the ride height you could always but air bags in i know its more money but you would have on board air for your bikes as well then

 

i have thought about putting air bags on but the leaf springs are so worn out cause the previous owner towed a 5th wheel. if i put air bags the truck would be riding almost completly on those and thats no good. thanks and let me know if you have any other suggestions.

 

can anyone explain what it means when it says the number of leafs are

4(3/1)

what is the (3/1)? are there 4 leafs or 3? thanks

 

3/1 means you have 3 leaves arched together and an overload (fat bottom spring) so a total of 4 leaves

 

so that means the 4/1 has a total of 5? thanks

 

That is correct

 

do i need to purchase anything else to install these or can i just use the stuff off the old leaf springs?