Overview
This page is a practical buyer checklist focused on authenticity verification. Use it before agreeing to any premium pricing on a claimed M22 Rock Crusher.
Real M22 Verification Checklist
| Checkpoint | What to Verify | If Missing |
|---|---|---|
| Casting number | Period-correct casting associated with claim | Treat as unverified and reduce offer |
| Serial/date codes | Consistent, legible, and believable stampings | Demand photos or inspect in person |
| Case features | Traits consistent with heavy-duty configuration | Assume mixed parts until proven otherwise |
| Noise/operation | Expected M22 character under load | Do not rely on seller description only |
Before You Inspect
- Request clear photos of castings and stampings.
- Ask whether the unit is original, rebuilt, or assembled from mixed parts.
- Ask for internal gear photos or receipts if rebuilt.
At-Inspection Checklist
Verify the numbers first, then inspect physical case details, side cover, and wear indicators. If the unit can be tested, use noise and shift feel only as secondary confirmation.
Pricing Discipline
No proof means no premium. Price uncertain units as rebuildable or generic Muncie cores until evidence is provided.
After Inspection
Run the Identification Tool and Value Estimator, then compare your result to recent sold listings before finalizing the purchase.
Frequently Asked Questions
What is the biggest mistake buyers make with M22s?
Paying premium prices based on a seller claim without verifying casting numbers, codes, and physical details.
Can rebuilt M22s still be valuable?
Yes, especially when the base unit is authentic and the rebuild is documented, but originality still affects top-end collector pricing.
What if the seller only has one blurry casting photo?
Treat the transmission as unverified and lower your offer until better evidence is available.
Next Steps
Use the Identification Tool to score your transmission, then run the Value Estimator and compare rebuild options on the Parts Comparison page.