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International 150 Alignment Caster Wedge Multi-Packs

International 150 Alignment caster wedge multi-packs

Starting at $55.95, AutoBuffy stocks 6 alignment caster wedge multi-packs from MOOG. Caster wedges are tapered shims installed between the axle and leaf spring to correct caster angle without full suspension modifications. When caster is off, the vehicle pulls to one side, tires wear unevenly, and steering feels unstable — especially at highway speeds.

Signs your International 150 needs new alignment caster wedges

  • Persistent pull to the left or right that wheel balancing and tire rotation do not fix
  • Steering wheel returns sluggishly to center after completing a turn
  • Uneven or feathered tire wear concentrated on the inner or outer tread edges
  • Wandering or darting sensation on straight highway stretches requiring constant steering correction
  • Noticeable difference in turn effort or feel between left and right turns
  • Recurring out-of-spec caster readings at the alignment shop even after prior adjustments

Which alignment caster wedge multi-pack should you buy for your International 150?

The most important buying decision is choosing the correct wedge angle — typically expressed in degrees — that moves your caster reading into the manufacturer's specified range. Multi-packs are sold with assorted or matched angles so you can dial in the exact correction needed. You also need to confirm the wedge fits your leaf spring width and bolt pattern before ordering.

Assorted-Angle Multi-Pack
Best for
First-time correction or unknown starting caster reading
What you get
Several wedges at different degree increments so you can test and select the angle that brings caster into spec
Matched-Pair Single Angle
Best for
Replacing worn wedges when the correct angle is already known from a previous alignment printout
What you get
Two identical wedges ensuring equal caster correction on both sides for balanced handling
Heavy-Duty Steel Wedges
Best for
Trucks, work vehicles, or lifted International 150 builds subject to high load and off-road stress
What you get
Thicker steel construction resists compression and deformation under sustained heavy loads
Polymer / Composite Wedges
Best for
Daily-driven International 150 on paved roads where corrosion resistance and weight savings matter
What you get
Rust-proof material that maintains its angle over time without the surface oxidation common on bare-steel shims

Alignment caster wedge multi-packs brands we stock for your International 150

MOOG
6 options · from $55.95

Replacing alignment caster wedges on a International 150

Moderate⏱ 1–2 hours (plus alignment time)Floor jack and jack stands rated for vehicle weightBreaker bar and deep socket set for U-bolt nutsTorque wrenchPenetrating oil for corroded U-bolt threadsAlignment angle gauge or access to an alignment shop for post-install verification

Safely raise and support the International 150, then loosen and remove the axle U-bolt nuts to free the existing wedge from between the leaf spring pack and the axle pad. Slide the new wedge into position with the taper oriented in the correct direction for your desired caster correction, reinstall the U-bolts, and torque the nuts evenly in a cross pattern to the manufacturer's specification. Always take the International 150 to an alignment shop immediately after installation to verify all angles are within spec before returning to normal driving.

Frequently asked questions

How much does it cost to replace alignment caster wedges on a International 150?
Parts start at $55.95 for a multi-pack at AutoBuffy. Add shop labor for a post-installation wheel alignment — typically one to two hours of alignment time — which is necessary to confirm the wedges have brought all angles into spec. Doing the physical swap yourself saves the most money; the alignment check is the step you should not skip.
What degree of caster wedge do I need for my International 150?
Get a current alignment printout first. The printout shows your measured caster angle and the manufacturer's target range. The difference between those two numbers tells you roughly how many degrees of correction you need. An assorted multi-pack lets you trial-fit wedges and re-check alignment until the reading lands within spec.
Can I install caster wedges myself on my International 150?
Yes, for most leaf-spring solid-axle vehicles the physical installation is a straightforward bolt-off, shim-in, bolt-on job that a mechanically experienced DIYer can complete in one to two hours. You must follow up with a professional wheel alignment to confirm the correction is accurate — installing wedges without re-aligning leaves you guessing.
Will caster wedges fix a vehicle that pulls to one side?
Caster wedges correct a pull caused specifically by unequal caster angle between the two sides. If the pull is caused by a different issue — brake drag, tire pressure imbalance, worn tie rods, or a bent component — wedges will not help. An alignment inspection before purchasing confirms whether caster is actually the cause.
How long do alignment caster wedges last on a International 150?
Quality steel or composite wedges are passive shims with no moving parts, so they can last the life of the suspension if kept properly torqued and protected from severe corrosion. They should be inspected any time the axle U-bolts are loosened, when a hard impact is sustained, or whenever alignment angles fall out of spec unexpectedly.
Do I need to replace caster wedges in pairs on my International 150?
It depends on your alignment readings. If both sides show equal caster error, replace both wedges with matched pieces. If only one side is out of spec, you may correct just that side — but always re-align the full axle afterward. Mismatched correction between sides can introduce a pull even if each angle is individually within tolerance.

Shop alignment caster wedge multi-packs by year for the International 150

1975

More parts for your International 150

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Alignment caster wedge multi-packs for other International models

International 1200AInternational 1300AInternational C122International 1200DInternational C1300International 1300B