How do I know if I have Muncie M20 or M21?
If you examine the 1966-’70 wide-ratio M20 input shaft, there are two grooves cut amid the 10 splines. From left to right are the three basic Muncie input shaft/countershaft combinations. On the left is the M20 countershaft and 10-spline input shaft. In the middle is the M21 countershaft and input shaft.
How do I identify my Muncie M21?
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.
How can you tell the difference between M22 and 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.
What is a M21 Muncie transmission?
The M21 & M22 is a four speed, RWD or 4WD transmission. The M21 & M22 is a Muncie engineering design, this transmission is aluminum case, extension housing and side cover. The side cover has seven bolts and two shift cams. The synchro rings have 35 teeth and the unit has a 4 step cluster gear.
How can you tell the difference between Muncie and Saginaw?
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 much HP can a Muncie M22 handle?
With the proper rear end gear a new M22 can handle close to 700HP!
Is a T10 a Muncie?
10 ways to improve the performance and reliability of your Super T10. The Muncie four-speeds have a distinct reputation for strength and durability, but the second-design T10 developed by Borg-Warner in the ’70s, which is often referred to as the Super T10, is nearly as durable as any regular-production Muncie.
How strong is a Muncie M22?
What is the difference between a Muncie and a Saginaw transmission?
How can you tell if you have a rock crush M22?
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.”
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 Super T10?
The Borg-Warner Super T-10 transmission is a heavy-duty, four-speed manual transmission that was designed for use in high-powered muscle and sports cars. The Super T-10 featured a large, 26-spline input shaft, as compared to a smaller 10-spline input shaft of the original T-10 transmission.
How can I tell if my Muncie has a m21 or M22?
As mentioned previously, we know that the Muncie came with several ratios. 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.
How much does a M21 Muncie transmission cost?
M20, M21 M22 Description Part Number Your Cost Rebuilt Transmission 1966-1974 M21 27 Sp MTGM016 $1,200.00 Rebuilt Transmission M22 1966-1974 Rock MTGM038 $1,666.67 Core Deposit for Above $1000.00
When did Muncie start using close ratio M21?
From 1963 to 1965 the close ratio M21 was ordered under the M20 RPO code and the factory decided whether to install a wide ratio M20 or close ratio M21 depending on the rear axle ratio specified. From 1966 on, the customer could decide the transmission selection.
What is the transmission ID and ratio guide for Muncie?
Muncie Transmission information Muncie Transmission Id and ratio guide D & L Transmission To order call 1-631-351-4837 Muncie Transmission ID and Ratio Guide Series Gear Ratio
