I have been reading all the posts regarding the crappy rear suspension on the X's. My 2000 2wd is no different. I can't find a definitive answer on here, so I guess I will just ask. Will the rear leaf springs from a 2005 F250 4wd fit on my 2000 X 2wd??? And more important, will it solve the extreme sagging and poor handling while towing my TT? I found a guy parting out the F250 and it has 135.000 miles. Unfortunately I do not have a bottomless bank account, and although JR at ATS was incredibly helpful, I can't swing $650 for his kit. Brand new on here so all info is greatly appreciated

 

ATS should be able to tell you if the springs will interchange at least-
I know on the 4x4s that rear springs '99-'07 will interchange. Don't know about 2wd.
Make sure you have a rear anti sway bar- these beasts are nasty without!

 

My son's '04 2WD F-350 has the same B code springs as the ones I pulled off an '03 4x4 donor truck to install in my Ex.

 

We recently purchased a 2002 V10 Limited 2wd 103k and were having the same problem pulling our 23' WW 6300lb dry/905lb tongue. When measured along the running boards it sat level.The original shocks were completely shot, the rear end was loose because of no factory rear sway bar and when the trailer was hooked up the rear end dropped dramatically. After new Bilstein shocks, a set of Hellwig sway bars front & rear and non-Ford 43-1261 rear springs it is a totally different car. The shocks give a firm down the road feel. The sway bars reduce body lean drastically. The rear springs raised the rear end 3/4" measured along the running boards. The ride is still good in the rear I think because the springs are 2 stage. With the trailer hooked up and the Equalizer WD hitch set the trailer drops 1/2" in front and the EX drops 1/2" in the rear below level measured at the running boards. It used to drop 1 3/4". I'm going to reduce the tongue weight a little and I think both will ride level. The leaf springs I used are rated at 3000lbs. The next stiffer spring would probably raise the read end another 1" or so. I wanted additional capacity, but not too much higher.

Check out this article - Excursion Leaf Spring Swap with F250 Springs | SD Truck Springs | Leaf Springs, Helper Springs and Suspension Parts

 

I'm going to say no. The '05+ SD truck had suspension upgrades that the EX never received.

Tom (WE3ZS) should be able to confirm or deny my answer.

Keep searching for an F-250 or even better F-350 SRW rear springs.

 

I would say they would physically fit.

Info on aftermarket springs from SDTruckSprings.com, all of these are 3" / 25"/ 33 1/4" -

43-1325......00-05 Ex 2wd....6 leaves.....5 5/8" arch....2,275 lbs....$320
43-1261......99-04 F250......4/1 leaves...7 7/5" arch....3,000 lbs....$115
43-1261HD...99-07 F250......5/1 leaves...7 1/2" arch....3,600 lbs....$200
43-1263......99-04 F250SD...4/1 leaves...8 3/16" arch..3,000 lbs....$115
43-1519......05-07 F250SD...4/1 leaves...6 7/8" arch....3,000 lbs....$250

 

Yes the '05 SuperDuty rear springs will fit your '00 2WD EX, the SD rear spring didn't change over to the longer design until '08, so those ones you are looking at will fit just fine. And yes, they should support the tongue weight of the TT better than the EX springs, the SD springs are also a dual rate setup so they deliver a better ride both load and unloaded. If the donor truck is still intact you can verify the spring code from the sticker on the drivers door, codes will appear under abbreviation for "spring" on the sticker. Expect to see two letters, first letter will be front spring code and second will be the rear spring code.

Silverfox, does your EX have a rear sway bar? If not I would seriously look into getting one if you are towing with the EX. Either a Hellwig bar (about $200) or a SD rear bar ('99 through '07 should work, the thicker the better, be sure to get all of the linkage, mounts and bushing with it if buying used) will make a huge difference in how the trailer's tongue weight influences the rear of the EX. Our rig was scary in stock form pulling our 9500lb toyhauler, the Hellwig helped calm down the amount of rear steer we were getting from the TH pushing the EX around. Upgrading to SuperDuty rear B code springs made an even bigger improvement in towing stability, I recommend doing both with a heavy trailer.

How long and heavy is the TT you are pulling? What WD hitch are you using and with what size spring bars on that hitch? Do you have accurate weights on the EX/TT? Does the EX have Load Range E tires on it? What tire pressures do you run front/rear on the EX when towing and on the trailer tires? Are you getting the front axle ride height (measure at the top of the wheelwell arch) returned to unloaded height when setting up the WD hitch, that should be your goal.

Personally I would NOT buy any springs from superdutytrucksprings, they advertise springs for our trucks using Ford's "code" letters that fall well short of the specs of the actual Ford springs. This has led to several folks not getting the finished results that they expected from swapping in certain "code" springs. Either buy new/used Ford springs or get together with a spring shop to request and verify the exact spring ratings you desire.