What This Kit Actually Is
This is a full kingpin kit for Ford 9000 lb capacity front air brake axles — kingpin, bushings, thrust bearing, seals, and the hardware to put it back together. It's not just a pin; it's everything that wears out in the knuckle assembly at once, which is how it should be done.
These axles show up on a lot of medium-duty Ford chassis and some vocational trucks running that 9000 lb front rating. If your steering feels loose, you get uneven front tire wear, or there's visible play when you jack the front end and rock the wheel top-to-bottom, the kingpins and bushings are shot — kit time, not just-the-pin time.
Why All These Numbers Cross
R200050, KPK1044, SP621551, TDAR200050, and S524451110 are all the same physical kit sold under different part numbering systems — some are supplier codes, some are old Ford service numbers, some are aftermarket kit numbers. Meritor and Stemco also list this fitment under their own numbers like 460.170B and FAK4493, because Meritor components ended up on a lot of these Ford front axles.
The thing to watch is bushing bore size and kingpin diameter — Ford ran a couple variations on 9000 lb front axles over the years, and a kit that looks identical can be off by a few thousandths on the bushing ID or a different pin length. Pull the old kingpin and measure it, or better yet, get the axle tag number off the front axle housing before you order.
Thrust bearing thickness matters too — stack height affects camber and pin preload. If your old kit had a thicker or thinner thrust washer than what's in this box, don't just swap it in and hope — check axle spec first.
Ordering From PartStop
We stock these in Tacoma and pull orders same day for local fleets — if you're broken down or need to get a truck back on the road before end of shift, call ahead and we'll have it at the counter.
Ship nationwide too, so if you're not local, doesn't matter — order goes out same day if you get it in before cutoff.
Every kit carries our 6+ month warranty. Confirm fit against your VIN or the number stamped on your old kingpin before you buy — Ford front axle specs aren't identical across every model year, and a wrong bushing bore will just have you shipping it back.
R200050 Cross-Reference & Interchange Numbers
These manufacturer and aftermarket numbers commonly cross-reference to R200050. Use them to identify the part — then confirm the exact fit by VIN or the number stamped on your old unit before you order. An interchange is a starting point, not a fitment guarantee.
| Brand / Line | Cross-Reference Numbers |
|---|---|
| Cross-Reference | KPK1044, SP621551, TDAR200050, S524451110, M2338 |
| Meritor / Stemco (Ford) | 262-1551, 460.170B, 50.095.06, FAK4493, 70.095.06, E-4457B, FKP73B, K95F, KP2210, KP2316 |
Frequently asked questions
Does R200050 fit my Ford truck?
Depends on your front axle, not just the truck model — Ford used more than one 9000 lb front axle spec over the years. Check the axle tag or the number stamped on your old kingpin/bushing, or give us your VIN and we'll cross it for you before you order.
Is this the same as the Meritor 460.170B kit?
Same physical kit, yes — Meritor and Stemco list this fitment under their own part numbers because their components ended up on these Ford axles. Cross-references match, but always confirm against the number on your old kit since bushing bore sizes vary.
What's actually in the box with KPK1044?
Kingpin, upper and lower bushings, thrust bearing, seals, and the hardware needed to reassemble the knuckle. It's a full rebuild kit for one side — check whether you need one kit per side or if you're doing both.
Not sure it fits? We check before you pay.
Run your VIN and we’ll match parts to your exact truck, or call the counter — a person who knows trucks verifies fitment by OEM number before the order ships. No wrong-box returns.
More cross-reference guides
Need the part, not just the reading?
Every part below is a Premium Quality aftermarket Direct Replacement with published OEM cross-reference numbers, a 6+ month warranty and same-business-day shipping from Tacoma, WA. Not sure it fits? Run your VIN — or call and a person who knows trucks will verify fitment before you pay.