How do I identify a Muncie transmission?
There is another way to quickly identify Muncie transmissions. All Muncie transmissions have a ring groove on the input shaft and counter gear. These grooves were cut into the input shaft so the Muncie assembly line worker could easily identify which input shaft should be installed in a particular unit.
What is the difference between a Muncie and a Saginaw transmission?
At a quick glance the Muncie can be easily distinguished from the Saginaw since the reverse lever on the Muncie is mounted on the extension housing of the transmission, whereas on the Saginaw transmission the reverse lever is mounted in the side cover of the transmission.
How do I know if I have Muncie M20 or M21?
So you can tell the difference by counting the teeth on the input or the cluster gear that engages the input. M21 input = 26 teeth. M20 input = 21 teeth. This is on a 66 to 74 model year Muncie.
How do I know M22 or M21?
The difference is that the M22 has straighter cut teeth on the gears while the M21 has more angle to the gears. There should also be a code stamped on the outside of the tranny that indicates which one it originally was. This code will not necessarily be correct anymore because someone could have changed the internals.
How much power can a Muncie handle?
It’ll handle 450 hp in a 3500 lb car with no problem.
How can you tell if you have a M22 Muncie?
Look for the “GM” sign imprinted on the transmission box to identify the manufacturer of the transmission. Check whether there are any rings around the shaft splines. An M-22 “Rock Crusher” has no rings, so if you see rings in your transmission, it means it is not an M-22 “Rock Crusher.”
How much HP can a Saginaw handle?
The saginaw was designed for non-performance cars. The maximum horsepower that a saginaw can handle is 250-300 horsepower.
How much horsepower can a Muncie M20 handle?
What is a granny low 4-Speed?
TOM: “Granny gear” is a term used for an ultra low gear on some heavy trucks. It’s lower than first gear, and it’s supposed to be used when the truck is carrying a very heavy load.
Why is M22 called rock crusher?
M22 gears are also made of a higher-grade nickel alloy. The M20 and M21 cluster gears are cut at a 45-degree angle. The reduced gear angle of the M22 created a problem with noise (hence the name “rock-crusher”).
What is a granny low 4 Speed?
Is a Muncie 4 speed a good transmission?
The Muncie four-speeds are a very popular transmission with Chevrolet muscle car enthusiasts, and are easily adaptable for a wide range of GM and other non-GM vehicles.
What is a Muncie M21 worth?
$450 is a pretty good deal for a m21 in working order.
How much does it cost to rebuild a Muncie 4 Speed?
A good rebuild kit is just under $200 and a set of Torq-Lock sliders is $75.
How do I know if my Saginaw is a 4 speed transmission?
Saginaw transmissions distinguish themselves from the Muncie four-speeds because the cases are cast iron rather than aluminum. Another quick way to determine a Saginaw is that the shifter arms are all located on the side cover of the transmission case (Muncie reverse arms are located on the tailshaft).
Why is it called a rock crusher transmission?
The reduced gear angle of the M22 created a problem with noise (hence the name “rock-crusher”). Performance seekers decided to live with the noise when the benefits of increased durability from the gear-tooth angle outweighed the gravelly clatter.
How strong is a Muncie M22?
A Muncie M22 is only rated to 500 lb ft (matched to the output of a 454 LS6).
Why do they call it granny gear?
So called because elderly people might be expected to favour slower speeds. “Granny-gear.” YourDictionary. Granny gear is the first gear in most heavy duty truck manual trannies. It simply refers to the speed the truck will go in that gear ( really slow ).
Does the NV4500 have a granny gear?
Featuring a granny low first gear coupled with a fifth gear overdrive, the stout NV4500 is truly the best of both worlds. First introduced in 1992, the NV4500 is a constant mesh helical geared, heavy duty 5 speed transmission. All forward gears are fully synchronized.
What transmission is known as 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.
