7-Point Pre-Order Checklist: Lemforder Tie Rods, Strut Mounts, Brake Calipers, and Filters

I've been managing parts procurement for a 75-vehicle vocational fleet for eight years. I sign off on roughly $45,000 in parts every quarter, have negotiated with 40+ vendors, and track every order in our fleet management system. The rule that has saved me the most money is simple: the cheapest repair is the one you only do once.

This checklist is for anyone who orders suspension, brake, and filter parts for a shop, fleet, or dealership service department. It's not a DIY tutorial. It's a 10-minute pre-order routine that keeps me from paying for the same repair twice. Eight years in, I won't place an order without checking these seven things.

The 7-Point Pre-Order Checklist

1. Verify the tie rod part number against the chassis code—not just year/make/model

I order Lemforder tie rods by part number, not by the online fitment filter. Why? Because two trucks with the same model year can have different steering racks, ride heights, or tie rod taper sizes depending on production month (sometimes even the same month).

In 2023, I matched the year, make, and model perfectly, but the tie rod had a 14 mm taper and the truck needed 16 mm. It wasn't the supplier's fault—it was my assumption. The return cost us two days and freight. Since then, I put the VIN into the catalog before I add Lemforder tie rods to the cart.

I don't have hard data on how many fitment errors start with a bad VIN entry, but based on our returns, I'd guess around 8% of order lines. That's too many when 5 minutes in the catalog fixes it.

2. Diagnose a caliper piston that won't go back in before you order a new caliper

“Why won't my caliper piston go back in?” is one of the most common questions I hear in the shop. The answer is rarely “because it's broken.” It's almost always one of four things:

• It's a rear wind-back caliper, and the piston has to be rotated while compressed.
• The slide pins are seized, so the caliper can't move enough to let the piston compress.
• The master cylinder reservoir is overfull, so fluid has nowhere to go.
• The piston boot is torn, and corrosion has frozen the piston in the bore.

Why does this matter? Because if you replace the caliper without clearing the cause, you will replace it again. In Q2 2024, we spent $680 on a rebuilt caliper and a new brake hose for a truck that just needed the rear piston wound back and a fluid flush. The “cheap” diagnosis cost us a full day of downtime—or rather, a full day plus a test drive that turned into another comeback.

3. Buy oil filters by specification, not by brand name—Super Tech included

A Super Tech oil filter will do the job if it's the right spec for the engine. A premium-brand filter will also do the job. But a filter with the wrong bypass valve, gasket size, or thread pitch will fail no matter what it costs.

We've used Super Tech oil filters on light-duty trucks in our fleet for the last two years. I didn't choose them because they're the cheapest; I chose them because the bypass spec and thread size matched the OEM filter for those engines. The fact that we save about $0.75 a filter—maybe $0.80, I'd have to check the last order—is a bonus.

Here's the thing: a “cheap” filter is cheap only if it meets the spec. If it doesn't, the labor cost of the oil change makes it the most expensive filter in the shop.

4. Check the catalytic converter platinum price before you quote a replacement

The catalytic converter platinum price is not a background factor in a repair quote—it is the cost. According to LPPM fix data (lppm.com), platinum spot was around $1,000 per troy ounce in early February 2025. That moves every trading day, so verify current rates before quoting.

Why does this matter? A converter can contain 3 to 6 grams of platinum-group metals. A swing of $100 per ounce on platinum changes the metal value by $10–$20 on a single converter, and rhodium moves even faster. We check the current price on the day we quote, and we also check the core return policy before we order. A converter with a missing mounting plate can be a different part number and a lower core value. (This was back in 2024, when the core return saved us $140 on one unit.)

5. Inspect the strut mount mating surface and hardware before you schedule labor

A Lemforder strut mount can be perfect out of the box, but it will not fix a rusted spring seat, a stripped stud, or a worn bearing. I order the mount after someone physically checks the top mount area and takes a photo.

I went back and forth between Lemforder and a budget strut mount for two quarters. The budget part was 32% cheaper on paper. After three warranty claims and a customer complaint about noise, I stopped bothering. The extra 10 minutes of inspection cost less than one return.

Also: order the mounting nuts and bolts at the same time. Reusing a corroded bolt to save $2 is how you get a comeback and a separate repair ticket.

6. Calculate total cost, not just part price

When I compare quotes for a tie rod or strut mount repair, I use a simple TCO calculation: part price + freight + core / return + expected labor + probability of rework.

In 2023, I compared two vendors for a six-month supply of a common control arm. One quoted $42; another quoted $38. But the second vendor charged $12 per order for small-order handling and a $15 restocking fee if a part number was wrong. The “cheaper” part was not cheaper by the time we added the handling fee to a quarterly order.

Put another way: a 10% discount on paper can disappear under a 20% restocking fee.

7. Lock in the core return or exchange policy before you hit the order button

Every suspension part has a return window. Every brake caliper has a core charge. Every catalytic converter has a scrap/recycle value that changes with the market. One of those will bite you if you don't ask.

In Q2 2024, we ordered a caliper that came with a $75 core. The old caliper arrived with a stripped bleeder screw, and the vendor rejected the core because the casting was “damaged.” We ended up paying $75 for a part we didn't keep. That's a policy that was in the terms I didn't read.

The question isn't “can I return it?” The question is “what's the condition for a full credit?” Ask it before you order.

Mistakes I Still See on Work Orders

• Relying on year/make/model fitment for tie rods and strut mounts. Use the VIN or chassis code.
• Assuming a caliper that won't compress is defective. Check for wind-back style, seized slides, or a full brake fluid reservoir first.
• Ignoring the PGM price on converter quotes. The platinum spot changes every trading day, and so should your estimate.

The worst part is that none of these are rare. They show up on repair orders every week, and they all share one cause: ordering before checking.

Bottom Line

Prevention isn't glamorous. It's 5 minutes of verification before an order, and it beats 5 days of correction. The parts list changes—Lemforder tie rods, a Super Tech oil filter, a new converter with platinum priced at the current spot—but the process is the same: check the fit, check the cause, check the total cost, and check the return policy. If you skip one, you will likely pay for it twice.