Talk:General Motors transmissions

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(Preparing info for consolidation.)
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*[http://www.teufert.net/trans/speedo.htm Speedometer colors/tooth count]
 
*[http://www.teufert.net/trans/speedo.htm Speedometer colors/tooth count]
 
*[http://www.teufert.net/trans/speedo-gears.htm Speedometer gear usage chart]
 
*[http://www.teufert.net/trans/speedo-gears.htm Speedometer gear usage chart]
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===Muncie M20, M21, M22 transmissions===
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====Muncie M20/21/22 ratios====
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<table border="1" cellspacing="0" cellpadding="2"><tr bgcolor="#FFF8DC">
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    <td>
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      <center><b>Series</b></center>
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</td>
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  <td>
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      <center><b>Gear Ratio</b> <br>
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      <b>1st, 2nd, 3rd, 4th</b></center>
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</td>
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  <td>
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      <center><b>Spline</b> <br>
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      <b>Input</b></center>
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</td>
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  <td>
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      <center><b>Grooves</b> <br>
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      <b>Input</b></center>
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</td>
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  <td>
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      <center><b>Cluster&nbsp;</b> <br>
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      <b>Pin&nbsp;</b></center>
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</td>
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  <td>
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<center><b>Tooth</b> <br> <b>Count</b> <br> <b>Input</b></center>
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</td>
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  <td>
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<center><b>Tooth&nbsp;</b> <br> <b>Count 4th</b> <br> <b>Cluster</b></center>
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</td>
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  <td>
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      <center><b>Output</b> <br>
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      <b>Spline</b></center>
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</td>
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</tr>
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  <tr>
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<td>
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      <center>M-20 wide ratio 63-65
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      <p>M-20 wide ratio 66-70 </p>
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      <p>M-20 wide ratio 71-74 </p>
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      <p>M-21 close ratio 63-65 </p>
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      <p>M-21 close ratio 66-70 </p>
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      <p>M-21 close ratio 71-74 </p>
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      <p>M-22 close ratio 65-69 </p>
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      <p>M-22 close ratio 70-74</p>
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      </center>
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</td>
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  <td>
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      <center>2.56, 1.91, 1.48, 1.00
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      <p>2.52, 1.88, 1.46, 1.00 </p>
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      <p>2.52, 1.88, 1.46, 1.00 </p>
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      <p>2.20, 1.64, 1.28, 1.00 </p>
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      <p>2.20, 1.64, 1.28, 1.00 </p>
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      <p>2.20, 1.64, 1.28, 1.00 </p>
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      <p>2.20, 1.64, 1.28, 1.00 </p>
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      <p>2.20, 1.64, 1.28, 1.00</p>
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      </center>
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</td>
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  <td>
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      <center>10
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      <p>10 </p>
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      <p>26 </p>
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      <p>10 </p>
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      <p>10 </p>
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      <p>26 </p>
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      <p>10 </p>
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      <p>26</p>
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      </center>
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</td>
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  <td>
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      <center>none
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      <p>2 </p>
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      <p>2 </p>
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      <p>1 </p>
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      <p>1 </p>
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      <p>1 </p>
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      <p>none </p>
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      <p>none</p>
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      </center>
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</td>
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  <td>
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      <center>7/8&nbsp;
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      <p>1" </p>
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      <p>1" </p>
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      <p>7/8 </p>
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      <p>1" </p>
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      <p>1" </p>
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      <p>1" </p>
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      <p>1"</p>
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      </center>
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</td>
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  <td>
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      <center>24
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      <p>21 </p>
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      <p>21 </p>
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      <p>26 </p>
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      <p>26 </p>
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      <p>26 </p>
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      <p>26 </p>
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      <p>26</p>
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      </center>
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</td>
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  <td>
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      <center>29
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      <p>25 </p>
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      <p>25 </p>
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      <p>27 </p>
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      <p>27 </p>
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      <p>27 </p>
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      <p>27 </p>
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      <p>27</p>
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      </center>
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</td>
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  <td>
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      <center>27
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      <p>27 </p>
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      <p>32 </p>
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      <p>27 </p>
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      <p>27 </p>
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      <p>32 </p>
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      <p>27 </p>
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      <p>32</p>
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      </center>
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</td>
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</tr>  </table>
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====Identifying Muncie M20 series transmissions====
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The external differences between the three Muncie 4 speed transmissions can be deceiving. If the cover is removed, the pitch of the gears can be seen.
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[[File:Muncie gearsM20-21 VS M22.jpg|thumb|400px|left|]] <br style="clear:both"/>
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Link to a Muncie page showing [http://www.dandltransmission.com/muncieratio.html Muncie gear ratio, spline counts, exploded view, parts list, etc.] from D&L Transmissions.

Revision as of 11:19, 7 January 2013

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