Here’s a clear, no-nonsense set of instructions for installing rear WeldTec lift blocks on a Ford Econoline van. These blocks raise the rear suspension by spacing the axle further from the leaf springs. This guide assumes you’re lifting the solid rear axle with leaf springs—the typical setup for Econolines.
Tools & Supplies Needed
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Floor jack & jack stands
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Lug wrench
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Socket and ratchet set (especially 21mm, 22mm, and breaker bar)
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Torque wrench
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Pry bar
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C-clamps (optional, for spring compression)
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Penetrating oil (PB Blaster or WD-40)
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Rear lift blocks (WeldTec)
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Extended U-bolts (included with kit or purchased separately)
Safety First
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Park on level ground.
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Chock the front wheels.
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Wear safety glasses and gloves.
Step-by-Step Installation
1. Loosen Rear Lug Nuts
Break the rear lug nuts loose with the van still on the ground. Don’t remove them yet.
2. Lift Rear End
Jack up the rear of the van by the axle housing. Place jack stands under the frame rails, not the axle—you’ll need the axle to hang free later.
3. Remove Rear Wheels
Take off the rear wheels and set them aside.
4. Support the Axle
Place a floor jack under the differential to support the axle. You don’t want it to drop suddenly when you remove the U-bolts.
5. Remove U-Bolts
Spray penetrating oil on the U-bolt nuts. Remove them using a socket and breaker bar. Discard the old U-bolts unless you’ve confirmed they’re long enough to reuse.
6. Separate Axle from Leaf Springs
Lower the axle slightly so it separates from the leaf springs. If it sticks, a gentle pry bar helps. Make sure the alignment pins on the leaf springs remain intact.
7. Install Lift Blocks
Place the WeldTec lift blocks between the axle and the leaf springs. Line up the leaf spring center pin with the hole in the lift block, and the dowel on the block with the hole in the axle perch.
Note: The tapered side of the block typically faces forward to correct pinion angle, but confirm with WeldTec’s directions for your exact kit.
8. Reinstall U-Bolts
With the lift block in place and everything aligned, install the new, longer U-bolts over the axle and through the spring plate. Tighten the nuts in a crisscross pattern to pull everything down evenly.
Torque to spec: Usually around 120–140 ft-lbs, but check WeldTec’s or U-bolt manufacturer’s recommendation.
9. Double-Check Alignment
Make sure the axle is square and centered. The pins should seat snugly. Look down the driveshaft to ensure no extreme angles.
10. Reinstall Wheels
Put the wheels back on and snug up the lug nuts.
11. Lower Van & Torque Lug Nuts
Lower the van back to the ground. Torque the lug nuts to 140–150 ft-lbs.
12. Recheck Everything
After a short drive, re-torque the U-bolt nuts and lug nuts. Expect things to settle slightly.
Final Tips
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An alignment shop visit is recommended after lifting.
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If you hear clunks or feel vibrations, check the torque on U-bolts and inspect driveshaft angles.
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You may need longer rear shocks depending on your lift height (usually over 2″).