Tech tools
Free tools for the garage & the yard
The lookups and calculators our own counter staff use every day — free, no sign-up, and every one prints to a clean PDF. Built by Edmonton's auto recycler, family-run since 1984.
VIN Decoder
Decode any 17-character VIN free: year, make, model, trim, engine size, cylinders, fuel type, plant, body class and GVWR.
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VIN Year Chart
Find a vehicle's model year from the 10th VIN character — instant lookup plus the full printable 1980–2039 chart.
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Tire Size Calculator
Compare two tire sizes: overall diameter, circumference, % difference, speedometer error and effective gear-ratio change.
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Gear Ratio Calculator
Work out your axle ratio from ring & pinion teeth, and your engine RPM at highway speed for any ratio, tire size and overdrive.
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GM RPO Decoder
Look up GM RPO codes from the glovebox sticker — axle ratios (GT4, GU6), locking diff (G80), transfer cases, transmissions and more.
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Rear Diff Identifier
Identify Toyota, Ford, GM and Dodge/Mopar rear differentials by cover shape, bolt count and ring-gear size — with common ratios.
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Shop Reference
Quick reference tables: wheel bolt patterns, lug torque specs, engine oil capacities, transmission ID and common OBD-II codes.
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Got an idea for a tool that would make your wrenching easier? Tell us— if it helps you find or fit the right part, we'll build it.