Input shafts differ in each GM transmission, so you can easily identify an M-22 "Rock Crusher by its input shaft count. Each transmission has different numbers of teeth. An M-22 "Rock Crusher" always has 26 teeth. Count …
The 1969 to 1974 Muncie got a ratio designating letter at the end of the date code. An example would be P0C25B. This decodes to 1970 (0), March (C), 25th, M21 (B).
Is there a way to tell if a muncie fourspeed is actually a M-22? Would I be able to tell by any serial numbers on it? Thanks.-Dan
05. If your Muncie is anything like ours, a thorough cleaning is the first step in the rebuild process. Ours had years of accumulated oil and dirt. We recommend using some sort of product that ...
1969-1974 codes include a suffix letter at the end to aid in identification of transmission ratios. A = 2.52 1st gear wide ratio M20, B=2.20 1st gear close ratio M21, C = 2.20 first …
Identifying Muncie 4 Speeds III by Paul Cangialosi The most popular question has to be that everyone thinks they have the famous "rockcrusher" M22 4 speed. This had the same gear ratios as the M21 but with a …
The Muncie M22 is known as the Rock Crusher. See how we improve its strength and versatility by adding a Gear Vendors Overdrive. motortrend. How To Build a Bulletproof Muncie M-22 Four-Speed Transmission. The Muncie M22 is known as the Rock Crusher. See how we improve its strength and versatility by adding a Gear …
Identifying The Muncie. Muncie four-speeds were produced in two different ratios: the wide ratio (M20) and the close-ratio (M21). There also was a second, heavy-duty close-ratio version: the "Rock ...
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Typical date code 0503N P-muncie 05-May 03-Third day. D/N-Day or night shift(not always coded) There is no year designation on these transmissions. MONTH 01-January ... (wide ratio), M21(close ratio), and the M22(rock crusher). Although not mentioned much, there was also an M23 transmission that was used, beginning in 1970. …
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The 1965 M22 maintained the 10-spline input and 27-spline output as all other Muncie transmissions from that model year.The 1965 M22 also had the drain plug boss drilled and tapped for a magnetic drain plug. This …
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1972 Muncie M22 Rock Crusher 4 Speed Transmission ORIGINAL C CODE. Opens in a new window or tab. Remanufactured. $3,295.00. Buy It Now +$150.00 shipping. derosnopS. ... 1972 M22 P2T03C 3925661 Rock Crusher Muncie 4 Speed Transmission Case Dec 3rd. Opens in a new window or tab. Pre-Owned. $549.99. or Best Offer. Free …
Muncie Stone crusher transmission Jump to Latest Follow 10K views 15 replies 13 participants last post by sparky1698 Feb 28, 2008
William Reehilon Muncie Super Duty M23 Upgraded Ultra Case 4-speed Road or Drag Racing Rock-Crusher. SALE EXTENDED!!! Bradon GASSER MUNCIE SUPER DUTY ULTRA CASE M23 4-Speed. SALE EXTENDED!!! glennon Auto Gear Upgraded Ultra Case M22Z Rock Crusher 4-speed. Perfect Performance with 2.73 to 3.42 Rear End Gears. …
It has a much lower first gear and fifth is 33% overdriven so you can have a low rear gear for good acceleration and still get on the freeway without taching 4000 rpm. I also think the Tremec TKO is stronger, but both trannies are pretty tough. Jody. ------------------. MY CAMARO.
By the time the Muncie was in its final phase of production (1971-1974) it also gained a 32 spline output shaft in place of the original 27 spline unit. Wide, Close, or Rock Crusher Initially there were two specific Muncie transmissions available: the M20 wide-ratio (2.56:1 first gear) and the M21 close-ratio (2.20:1 first gear).
from Southern Ok. ""You can outfit an M20 or M21 with Rock Crusher type gears, OR actually make a 3 speed O/D out of a 4 speed case. Forth being the overdrive obviously.. Actually the 3rd gear station becomes the OD and the 4th gear station becomes 3rd,so the shift pattern is a little d,1-2-4-3.
The body was rust-free. Originally built in Van Nuys, CA, and sold new in La Puente, CA. All date-code-correct parts were used. Some parts used on the build are original LS6 parts. Correct 1970 4-bolt 454/450hp block, M22 4-speed Rock Crusher Muncie transmission and original LS6 CRW 410 12-bolt posi-traction rear end.
I believe the pass side. Will start with a "P" For example P0C13C Starting in 69, the date code also has the ratio designator letter on the end. A = M-20, B = M-21, C = M-22. There should also be a partial VIN in the same general area. If it's the original trans, should match the VIN of your car. P = Muncie Pass Car.
People think the "Rock Crusher" is special or stronger than a standard wide box Muncie. It is special in terms of price but it isn't any stronger. The "Rock Crusher" was built for road racing, with the angle of the gears straightened out to prevent excessive wear in the front bearings due to the forward thrust component of the force vectors ...
Just three types of Muncie 4-speeds are available based on the RPO (regular production option) code used when a car was ordered: the M20 (standard wide-ratio), M21 (close …
The M22! This iconic transmission is based upon the infamous "ROCK CRUSHER" Transmission made famous in the 60`S AND 70`S by being installed in the L-88`S, BIG BLOCK 425 HP Factory Muscle Cars and HOT RODS of the past. The M22 has all new internal parts. All exterior parts are hand picked, visually inspected, painstakingly …
Jim Mac. 12664 posts · Joined 2004. #5 · Apr 24, 2022. hopefully he meant that a m22/rock crusher was rarer installed in a car. jim. Jim. 70 chevelle, SS clone 454 4 speed 3.31 12 bolt posi. 71 camaro. (owned since 1978!) 454-th400 3.07 12 bolt. 66 chevelle 350 4 speed 3.55 12 bolt and a newly added 142 wieand blower.
P stands for Muncie Plant. Not for passenger car as some self proclaimed specialists may think. The letter M was used to ID the Muncie plant for the Muncie 3 speed, so P was the next logical letter. The letter O would add confusion since it resembles zero. The serial number is a date code the transmission was built for a particular year.
You can identify several unique signs that identify an M-22 "Rock Crusher," even if it does not have a GM hallmark imprinted on its surface. Step 1 Check the casting number, the …
According to Paul Cangialosi, Muncie transmission historian, technician, and author of Muncie 4-Speed Transmissions: How to rebuild and modify, the Muncie four-speed transmission has its roots back to 1935 and the U.S. patent number 3,088,336 along with an engineer named James W. Fodrea.This patent number, according to Cangialosi, …
The 2.20:1 ratio first gear is usually referred to as the Muncie M21 transmission; based on GM's production codes. The 2.56:1 ratio is referred to as the M20. Muncie also had a second close-ratio transmission coded M22 and known as the "rock crusher," which was used behind performance big-block engines and in some …
Check These Out. Complete original GM Muncie transmission rebuilt and guaranteed for 1 year. Correct fit for all 1969 - 1973 model Chevelles and Novas. This one will have the holes on the side where a bolt will secure your shifter linkage levers. This is the Muncie M-22 Rockcrusher four speed.
