What is the difference between a Muncie M21 and M22?
The M20 and M21 transmissions produced from 1963-’74 are easy to identify in both wide- and close-ratio units. The M22 to come later in 1967-’74 is also a close-ratio unit, but much stronger than the M21, with a higher torque capacity.
Which Muncie transmission is the rock crusher?
M22
Muncie also had a second close-ratio transmission designated M22 and often referred to as the “rock-crusher,” which was used behind the highest-performance engines and in Corvettes, the M22 is a highly sought-after performance transmission. It is the heavy-duty version of the 2.20:1 ratio M21 four-speed.
What cars came with a Muncie M22?
From 1965-onwards the Rock Crusher was available with the Corvette, and by 1969 it was found on vehicles as diverse as the Chevelle, the Camaro, and the Oldsmobile 442. If a car made big power, chances are a Muncie M22 was on the menu.
How strong is a Muncie M22?
A Muncie M22 is only rated to 500 lb ft (matched to the output of a 454 LS6).
How can you tell if you have a M22 Muncie?
Because main cases are often swapped rather than being repaired, the best way to determine if you have an M20, M21, or M22 is to simply look at the gears. Without removing the sidecover you can look at the input shaft and check for identification grooves cut into the spline.
Does M22 have straight cut gears?
Muncie M22 4 Speed Transmission Close Ratio (Heavy Duty Straight Cut Gears)
What is a M22 Rock Crusher worth?
M22 rock crusher 4 speed transmission
$2,500.00.
How do you identify a Muncie M22 Rock Crusher?
How do I identify a Muncie M22?
How do you tell a Muncie M20 from M22?
How many splines does a Muncie M22 have?
21.
| Input Shaft Identification | ||
|---|---|---|
| Years | Type | Input Shaft Splines |
| 1963-’70 | M21 | 10 |
| 1970-’74 | M21 | 26 |
| 1967-’70 | M22 | 10 |
How many spline is a Muncie 4 speed?
Please note that there are 7 different Muncie input shafts. All 26 spline inputs came with 32 spline output shafts and all 10 spline inputs came with 27 spline output shafts.
How can you tell a Muncie M22?
How do I tell what year my Muncie transmission is?
All Muncie transmissions have a ring groove on the input shaft and counter gear.
…
Build Date Code Breakdown
- P represents the manufacturing plant, Muncie.
- 04 represents the month code when the unit was assembled, April.
- 21 represents the day of the month the unit was assembled, the 21st day of April.
How do I identify my Muncie M22?