chuckholes Posted October 22 Share Posted October 22 How can I determine what trans is in my 1970 MB? It is a twin stick. I searched the site and found some info about the type being on the left side. Nothing that I can find there. the right side has some casting numbers and the date 1/7/70 284KB 5122A. On the side. Quote Link to comment https://www.bigmacktrucks.com/topic/74667-mack-mb-transmission/ Share on other sites More sharing options...
Joey Mack Posted October 22 Share Posted October 22 I bet its an X-107. Look on the left side, front case near the fill plug. It should be stamped in that area.. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/74667-mack-mb-transmission/#findComment-560511 Share on other sites More sharing options...
1961H67 Posted October 22 Share Posted October 22 While the transmission subject has been brought up, I have 2 , 10 speed Duplex transmissions if anyone wants them, they were good, but they got washed around in the flood and I’m sure they will have to be flushed out or maybe taken apart. I’ll probably take them to the salvage yard if no one wants them. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/74667-mack-mb-transmission/#findComment-560513 Share on other sites More sharing options...
terry Posted October 22 Share Posted October 22 3 hours ago, Joey Mack said: I bet its an X-107. Look on the left side, front case near the fill plug. It should be stamped in that area.. that is a single countershaft transmission case, duplex, tri, or quadraplex. Terry 2 Quote Link to comment https://www.bigmacktrucks.com/topic/74667-mack-mb-transmission/#findComment-560520 Share on other sites More sharing options...
Joey Mack Posted October 22 Share Posted October 22 Ok.. i looked at it again.. i see what your saying.. Good eye... Quote Link to comment https://www.bigmacktrucks.com/topic/74667-mack-mb-transmission/#findComment-560523 Share on other sites More sharing options...
mowerman Posted October 22 Share Posted October 22 it should look something like this 1 Quote Link to comment https://www.bigmacktrucks.com/topic/74667-mack-mb-transmission/#findComment-560530 Share on other sites More sharing options...
chuckholes Posted October 22 Author Share Posted October 22 8 hours ago, mowerman said: it should look something like this Do you have a wider angle to give a better idea of where this is? Quote Link to comment https://www.bigmacktrucks.com/topic/74667-mack-mb-transmission/#findComment-560571 Share on other sites More sharing options...
chuckholes Posted October 22 Author Share Posted October 22 I looked on the left side of the trans. Cleaned with a wire brush and brake cleaner and still could not find anything in this area Quote Link to comment https://www.bigmacktrucks.com/topic/74667-mack-mb-transmission/#findComment-560572 Share on other sites More sharing options...
chuckholes Posted October 22 Author Share Posted October 22 10 hours ago, terry said: that is a single countershaft transmission case, duplex, tri, or quadraplex. Terry It’s duplex I believe. With 2 sticks Quote Link to comment https://www.bigmacktrucks.com/topic/74667-mack-mb-transmission/#findComment-560573 Share on other sites More sharing options...
mowerman Posted October 23 Share Posted October 23 Quote Link to comment https://www.bigmacktrucks.com/topic/74667-mack-mb-transmission/#findComment-560580 Share on other sites More sharing options...
mowerman Posted October 23 Share Posted October 23 hope this helps 1 Quote Link to comment https://www.bigmacktrucks.com/topic/74667-mack-mb-transmission/#findComment-560581 Share on other sites More sharing options...
chuckholes Posted October 23 Author Share Posted October 23 37 minutes ago, mowerman said: hope this helps Thanks will look there tomorrow Quote Link to comment https://www.bigmacktrucks.com/topic/74667-mack-mb-transmission/#findComment-560585 Share on other sites More sharing options...
mowerman Posted October 23 Share Posted October 23 You bet….. good luck bud just retired 3 weeks ago pretty much on here all day now … bob 1 Quote Link to comment https://www.bigmacktrucks.com/topic/74667-mack-mb-transmission/#findComment-560590 Share on other sites More sharing options...
chuckholes Posted October 24 Author Share Posted October 24 This is what I found. Was getting dark. This what I think it says D 722 6B 8852 11 KBA5850 P 2 Quote Link to comment https://www.bigmacktrucks.com/topic/74667-mack-mb-transmission/#findComment-560659 Share on other sites More sharing options...
chuckholes Posted October 24 Author Share Posted October 24 Quote Link to comment https://www.bigmacktrucks.com/topic/74667-mack-mb-transmission/#findComment-560660 Share on other sites More sharing options...
terry Posted October 24 Share Posted October 24 4 hours ago, chuckholes said: This is what I found. Was getting dark. This what I think it says D 722 6B 8852 11 KBA5850 P 2 Probably a TRD 720 which is a overdrive duplex, but if it is a 722 not sure what that last 2 means, and if it is a 2 then it is a direct trans. terry Quote Link to comment https://www.bigmacktrucks.com/topic/74667-mack-mb-transmission/#findComment-560675 Share on other sites More sharing options...
chuckholes Posted October 24 Author Share Posted October 24 6 hours ago, terry said: Probably a TRD 720 which is a overdrive duplex, but if it is a 722 not sure what that last 2 means, and if it is a 2 then it is a direct trans. terry It’s a two stick. Assuming that’s a duplex. Quote Link to comment https://www.bigmacktrucks.com/topic/74667-mack-mb-transmission/#findComment-560681 Share on other sites More sharing options...
mowerman Posted October 24 Share Posted October 24 I heard Mack did not go to s single stick till around 77 other than the maxidyne Quote Link to comment https://www.bigmacktrucks.com/topic/74667-mack-mb-transmission/#findComment-560682 Share on other sites More sharing options...
chuckholes Posted October 26 Author Share Posted October 26 On 10/24/2024 at 7:50 AM, mowerman said: I heard Mack did not go to s single stick till around 77 other than the maxidyne Definitely a two stick in my MB. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/74667-mack-mb-transmission/#findComment-560837 Share on other sites More sharing options...
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