How to Identify a M22 Rock Crusher

Are you curious about how to identify a M22 Rock Crusher transmission? Look no further! We have all the information you need right here.

Key Takeaways:

  • Check the casting number, production year, and gear ratios on the aluminum serial number plate attached to the transmission box.
  • Count the input shaft teeth – an M22 Rock Crusher will always have 26 teeth.
  • Count the number of splines – M22 Rock Crushers made between 1967 and 1970 have 10 splines, while transmissions made between 1969 and 1974 have 26 splines.
  • Look for the GM sign imprinted on the transmission box to identify the manufacturer.
  • Check for any rings around the shaft splines – M22 Rock Crushers do not have rings.
  • If you are still unsure, contact a reseller or manufacturer that produces replacement transmissions for expert assistance.

Checking the Casting Number, Production Year, and Gear Ratios

The casting number, production year, and gear ratios are key factors in identifying a M22 Rock Crusher transmission. By examining these details, you can confidently determine whether you have the iconic M22 transmission in your possession.

To begin, locate the aluminum serial number plate attached to the transmission box. This plate contains valuable information that will aid in your identification process. Look for the casting number, which is a unique identifier for the transmission box. By cross-referencing this number with available resources, you can confirm if it matches the casting numbers associated with the M22 Rock Crusher.

Next, pay attention to the production year listed on the serial number plate. M22 Rock Crushers were manufactured between 1967 and 1974, so the production year can help narrow down the possibilities.

Finally, take note of the gear ratios specified on the serial number plate. The M22 Rock Crusher is known for its distinctive gear ratios, which contribute to its legendary performance. These ratios are typically displayed in the format of “2.20:1 1st, 1.64:1 2nd, 1.28:1 3rd, and 1.00:1 4th.” By confirming that your transmission’s gear ratios align with these specifications, you can be confident in your identification of an authentic M22 Rock Crusher.

Transmission ComponentIdentification Key
Casting NumberUnique identifier for the transmission box
Production YearManufactured between 1967 and 1974
Gear RatiosDistinctive ratios: 2.20:1 1st, 1.64:1 2nd, 1.28:1 3rd, and 1.00:1 4th

Counting Input Shaft Teeth and Splines

By counting the input shaft teeth and splines, you can further narrow down whether you have an M22 Rock Crusher or not. Each transmission has a specific number of teeth and splines, providing valuable clues for identification.

To begin, locate the input shaft, which is the main shaft that connects the transmission to the engine. Take note of the number of teeth on the input shaft. An M22 Rock Crusher transmission will always have 26 teeth on the input shaft, regardless of the year it was produced.

Next, count the number of splines on the input shaft. M22 Rock Crushers made between 1967 and 1970 have 10 splines, while transmissions produced between 1969 and 1974 have 26 splines. This distinction in splines helps differentiate the M22 Rock Crusher from other types of transmissions.

By combining the information gathered from counting the input shaft teeth and splines, you will have a clearer understanding of whether your transmission is indeed an M22 Rock Crusher or a different model. Remember to take note of these numbers and compare them to the specifications of the M22 Rock Crusher to confirm your identification.

TransmissionInput Shaft TeethInput Shaft Splines
M22 Rock Crusher (1967-1970)2610
M22 Rock Crusher (1969-1974)2626

If after counting the input shaft teeth and splines you are still unsure about the authenticity of your transmission, don’t worry. There are experts available who can provide assistance. Contact a reseller or manufacturer that produces replacement transmissions for guidance and further clarification. They have the knowledge and expertise to help you determine whether your transmission is an M22 Rock Crusher or a different type.

Looking for Manufacturer Sign and Rings

The manufacturer’s sign and the presence of rings are crucial elements in confirming if you have an authentic M22 Rock Crusher transmission. When inspecting the transmission box, be sure to look for the GM sign, which indicates the manufacturer. This sign is imprinted on the box and serves as a reliable identifier for an original M22 Rock Crusher.

In addition to the GM sign, pay close attention to the presence of rings around the shaft splines. M22 Rock Crushers do not have rings, so if you notice any rings on your transmission, it is a clear indication that it is not an authentic M22 Rock Crusher. These rings, if present, suggest that you may have a different type of transmission.

To summarize, when identifying a M22 Rock Crusher transmission, thoroughly inspect the transmission box for the GM sign and carefully examine the presence of rings around the shaft splines. These unique signs will help you determine if your transmission is genuine or not and ensure that you have an accurate understanding of your M22 Rock Crusher transmission.

Identification SignsAuthentic M22 Rock CrusherNot an M22 Rock Crusher
GM SignPresentAbsent
Shaft SplinesNo RingsRings Present

Seeking Expert Assistance

If you’re still unsure about the identification of your transmission, there’s no need to panic. Reach out to a reseller or manufacturer that specializes in replacement transmissions for professional assistance.

When it comes to identifying a unique transmission like the M22 Rock Crusher, expert guidance can make all the difference. A reseller or manufacturer that specializes in replacement transmissions will have the knowledge and experience to help you determine the authenticity of your transmission.

These professionals have seen it all and can guide you through the process of identifying the specific features and signs that indicate whether or not you have an M22 Rock Crusher transmission.

Whether you need help with casting numbers, gear ratios, input shaft teeth, or any other details, the experts will be able to provide the necessary guidance to ensure you have an accurate identification.

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