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Canadian Poncho Homepage -> Canadian Poncho -> General Beaumont Discussion -> !967 Beaumont build sheet and 4 speed option question
Post Info TOPIC: !967 Beaumont build sheet and 4 speed option question
1967togo


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!967 Beaumont build sheet and 4 speed option question
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I have a '67 Beaumont Custom with Sports option that I bought in April of 1968.Years ago I sent to GM and got the build sheet in letter form by George Zapora.Vehicle is a 4 speed and option on letter for this is M20 4-speed transmission-wide ratio 2.52 first gr.I know M20 is a Muncie,however the trans in my car is a Saginaw.If I hadn't owned car since nearly new,I would think Muncie had been swapped out years earlier for a Saginaw.The 1st owner told me it was a Saginaw when I bought it from him.So,how is a Saginaw specified in a build sheet?And would having a Muncie now,add that much to value of the car?Thanks.

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427carl


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Welcome Wayne! handshake.gif   good question    I have a friend down the street, with a original 67 Chevy II HT with single exhaust 327-275 and Saginaw 4 speed and 12 bolt rear    I am sure you will get a lot of responce from this question... Carl

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ak 67sd


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this thread is useless without pics!!...

not really, just kidding! i just want to see pictures of your car!! welcome!

ak

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rabbit64cs


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I think most will agree, m20 option just denotes a 4 spd. It does not mean saginaw, m20, m21, m22, or st-10
now saying that, I do not know how to differentiate? This was discussed at length about a 80's camaro recently.

Someone here should have the inside info

later... Rog

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later...rog

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427carl


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1967togo wrote:

I have a '67 Beaumont Custom with Sports option that I bought in April of 1968.Years ago I sent to GM and got the build sheet in letter form by George Zapora.Vehicle is a 4 speed and option on letter for this is M20 4-speed transmission-wide ratio "2.52 first gr".I know M20 is a Muncie,however the trans in my car is a Saginaw.If I hadn't owned car since nearly new,I would think Muncie had been swapped out years earlier for a Saginaw.The 1st owner told me it was a Saginaw when I bought it from him.So,how is a Saginaw specified in a build sheet?And would having a Muncie now,add that much to value of the car?Thanks.


        Here is 67 GM info. M20 was also a reference to Saginaw


      

Manual 4-speed Transmissions

M20 was the generic RPO for a 4-speed transmission.

For lower performance applications (L6, 307, 327, and L65 350), the Saginaw 4-speed was utilized. It used a cast iron case. For higher performance applications (LM1 350, SS350, big blocks, and Z28) the Muncie 4-speed was used. It used an aluminum case and different gear ratios from the Saginaw 4-speed.

The primary Muncie 4-speed transmission was marketed under RPO M20. The close-ratio version of the Muncie 4-speed was RPO M21 and the heavy-duty close-ratio 4-speed was RPO M22. M21 and M22 transmissions were limited to specific high performance models.

The  4-speed manual transmissions ratios for both Muncie and Saginaw, with other Muncie data, are as follows:

 

             Maincase      Gear Ratios     Input  Grooves  Cluster Output 
  RPO Years  Casting   1st  2nd  3rd  4th  Spline (Input)    Pin   Spline
  -----------------------------------------------------------------------
Saginaw
 M20   67    3915032   3.11 2.20 1.47 1.00     L6 engine
 M20  68-69  3925656   3.11 2.20 1.47 1.00     L6 engine
 M20   67    3915032   2.54 1.80 1.44 1.00     V8 engine
 M20  68-69  3925656   2.54 1.80 1.44 1.00     V8 engine 

Muncie
 M20  63-65  3851325   2.56 1.91 1.48 1.00   10    None      7/8"    27
 M20  66-67  3885010   2.52 1.88 1.46 1.00   10     2         1"     27
 M20  68-69  3925660#  2.52 1.88 1.46 1.00   10     2         1"     27
 M20   70    3925661   2.52 1.88 1.46 1.00   10     2         1"     27
 M20  71-74  3925661   2.52 1.88 1.46 1.00   26     2         1"     32


 



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Beaumont4008


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All it says in my 69 factory option code list from gm is     M20   4-speed (wide range) thats all it says.



Good list Carl. Thats a good one for the Library.



-- Edited by Beaumont4008 on Monday 21st of December 2009 11:08:00 PM

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1967togo


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Not too good at the photo thing.I know I have a few on something called photobucket that I sent to someone a year or so ago but I can't remember how I did it.Let me know if you can help.Thanks.

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4SPEED427


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Do you know your user name for photobucket? That is all that's needed.

Oh, and welcome here. As stated, we'd love to see pics. Also, Fred will be in here shortly asking for a picture and info off your cowl (firewall) tag I'm sure to add to our Beaumont registry. If you haven't seen the registry and you're into vehicle info/data you're gonna love what he's done.

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1966 Strato Chief 2 door, 427 4 speed, 45,000 original miles 

1966 Grande Parisienne, 396 1 of 23 factory air cars (now converted to a "factory" 4 speed)
1967togo


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Hi Carl and thanks.I'm on photobucket right now but can't get any photos when I 'choose file'.HELP!!

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4SPEED427


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You have the album open and are looking at the pics you want to post here?

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1966 Strato Chief 2 door, 427 4 speed, 45,000 original miles 

1966 Grande Parisienne, 396 1 of 23 factory air cars (now converted to a "factory" 4 speed)
1967togo


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Yep.I have 2 web browsers going so I can jump back and forth.

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4SPEED427


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Ok, go to the picture you want to put on here.

Move the cursor over the picture and a box will open below it.

Bottom line on the box is IMG code

Left click IMG code

The line beside it turns blue

Right click on the blue, left click copy

Come here and in the "reply" box left click so you are ready to type in the box

Right click in the box and you will see the word "paste"

Left click on paste and hit reply as if you had just typed a sentence

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1966 Strato Chief 2 door, 427 4 speed, 45,000 original miles 

1966 Grande Parisienne, 396 1 of 23 factory air cars (now converted to a "factory" 4 speed)
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1967togo


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[IMG]https://i395.photobucket.com/albums/pp40/1967t
[IMG]https://i395.photobucket.com/albums/pp40/1967t
[IMG]https://i395.photobucket.com/albums/pp40/1967t
[IMG]https://i395.photobucket.com/albums/pp40/1967t


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4SPEED427


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Hmm, not sure what happened there. No pics.

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1966 Strato Chief 2 door, 427 4 speed, 45,000 original miles 

1966 Grande Parisienne, 396 1 of 23 factory air cars (now converted to a "factory" 4 speed)
4SPEED427


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-- Edited by Carl Stevenson on Monday 21st of December 2009 11:56:33 PM

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1966 Strato Chief 2 door, 427 4 speed, 45,000 original miles 

1966 Grande Parisienne, 396 1 of 23 factory air cars (now converted to a "factory" 4 speed)
1967togo


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I've got a Mac here,but I know I've done this before.Bear with me(for a few days) and I'll figure it out.

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4SPEED427


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Got it!

I am in your album. Works for me somehow!!!

Wow, beautiful Beaumont. Is this your's with the SD trim?

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1966 Strato Chief 2 door, 427 4 speed, 45,000 original miles 

1966 Grande Parisienne, 396 1 of 23 factory air cars (now converted to a "factory" 4 speed)
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4SPEED427


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1966 Strato Chief 2 door, 427 4 speed, 45,000 original miles 

1966 Grande Parisienne, 396 1 of 23 factory air cars (now converted to a "factory" 4 speed)
4SPEED427


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1966 Strato Chief 2 door, 427 4 speed, 45,000 original miles 

1966 Grande Parisienne, 396 1 of 23 factory air cars (now converted to a "factory" 4 speed)
1967togo


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I can see 3 or 4 photos.Not how you're supposed to get them,but they're mine.I'll keep trying to get it right.

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4SPEED427


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May be Mac related, I don't know. I'm no computer geek!

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1966 Strato Chief 2 door, 427 4 speed, 45,000 original miles 

1966 Grande Parisienne, 396 1 of 23 factory air cars (now converted to a "factory" 4 speed)
4SPEED427


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1966 Strato Chief 2 door, 427 4 speed, 45,000 original miles 

1966 Grande Parisienne, 396 1 of 23 factory air cars (now converted to a "factory" 4 speed)
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ak 67sd


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you were close on your first post... the file link should start and end with [IMG]

beautiful looking car!!! very nice!! ...almost think i've seen it before, has it been on any other websites?

ak

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Wpg, MB to London, ON

Numbers don't match! Especially HP and ET. 
jmont64


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Wow great looking car. Love that color combo. And it's so neat to hear of people like you who have had the car almost its entire life. Thanks for posting.

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Jerel
4SPEED427


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AK, I tried doing the IMG add on and it didn't help. Not sure why. It seems to be chopping off some of the line when he pastes it or something.

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1966 Strato Chief 2 door, 427 4 speed, 45,000 original miles 

1966 Grande Parisienne, 396 1 of 23 factory air cars (now converted to a "factory" 4 speed)
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