m-20 ,21,22 differences - Team Camaro Tech
Tech 2002 General Tech questions from 2002
Replies ONLY, no new topics.

LinkBack Thread Tools Display Modes
post #1 of 2 (permalink) Old Jul 1st, 02, 02:12 PM Thread Starter
Senior Tech
Join Date: Jul 2001
Location: Beattyville Ky.USA
Posts: 163
Yea, I was just wandering if there is a way to tell the difference between the Muncie M-20, M-21, and the M-22 transmissions just by looking at them and is there anybody out there who has pictures of the transmissions that I can compare with,any help would be appreciated,,,

Thanks Camaro BOB
bdcole_51 is offline  
Sponsored Links
post #2 of 2 (permalink) Old Jul 1st, 02, 02:29 PM
Team Member
JohnZ's Avatar
Join Date: Sep 2000
Location: Washington, Michigan USA
Posts: 7,728
There's no way to tell for sure just by looking, as many replacement input shafts have no coding grooves, and many cases that originally had no drain plugs have had them added during rebuilds for convenience.

The only sure way to tell is to pull the side cover and look at the helix angle of the gears; the M20/21 are about 40 degrees from horizontal, and the M22 gears are about 20 degrees from horizontal. This link shows a photo of an M22 with the side cover pulled:

'69 Z28 Fathom Green
JohnZ is offline  
Sponsored Links

Quick Reply

Register Now

In order to be able to post messages on the Team Camaro Tech forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid email address.
NOTE we receive a lot of registrations with bad email addresses. IF you do not receive your confirmation email you will not be able to post. contact support and we will try and help.
Be sure you enter a valid email address and check your spam folder as well.

Email Address:


Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode

Posting Rules  
You may not post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome