Which is better - The 1947 - Present Chevrolet & GMC Truck Message Board Network

bad 71 chevy · 09-21-2003, 03:20 AM

A muncie m-21 or an m-20 and what is the big differance with them thanks

JimKshortstep4x4 · 09-21-2003, 06:59 AM

I am not sure if one is "better" than the other. I guess it would depend on the application. The M-20 is a wide ratio transmission
which means it has a lower ratio first gear, (I believe that it is 2:52 to 1) which will give you greater starting torque. The M-21
is a close ratio transmission and has a higher ratio first gear, 2:20 to 1. Outside of the different first gear ratios the two transmissions are very similiar.

Here is a link that has more information on the Muncies.

Jim

http://www.gearzone.net/kit.htm

09-21-2003, 03:20 AM	#1
bad 71 chevy Registered User Join Date: Jun 2000 Location: Omaha NE 68122 Posts: 637	Which is better A muncie m-21 or an m-20 and what is the big differance with them thanks __________________ 71 Chevy C/10 lwb 350 5 speed nv3500 3.73 rear end 2.5" Front Drop and 4" in the back Edelbrock perfomer rpm manifold Edelbrock 600 cfm carb Headmen headers

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

09-21-2003, 06:59 AM	#2
JimKshortstep4x4 Senior Member Join Date: Jul 2001 Location: Muskegon,MI,USA Posts: 6,026	I am not sure if one is "better" than the other. I guess it would depend on the application. The M-20 is a wide ratio transmission which means it has a lower ratio first gear, (I believe that it is 2:52 to 1) which will give you greater starting torque. The M-21 is a close ratio transmission and has a higher ratio first gear, 2:20 to 1. Outside of the different first gear ratios the two transmissions are very similiar. Here is a link that has more information on the Muncies. Jim http://www.gearzone.net/kit.htm



Register or Log In To remove these advertisements.

Register or Log In To remove these advertisements.