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Hi, Awesome site here, looks like a lot of information is held here. My first of many question to come. Just brought home a 1965 B 61 twin screew I has the 5 speed main but it seems like the aux is a 3 speed it will not shift over left and up. Could this be right? There is no shift pattern plate.

Thanks

J

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Hi Thanks for the repys. I will see if I can find the numbers on the trans in the next day or so. I will post them when I find them.

If it is a triplex is there any combination I should avoid using?

My profile pic is a pic of the truck I am asking about.

Thanks again for your help.

Jim

If it is a triplex is there any combination I should avoid using?

The gear ratios are fairly progressive. Depending on which transmission number you have, there may be some overlap or redundant gear ratios.

Check out this link. Open the pdf up, scroll down with your trans number and it will give the ratios in each gear.

http://www.bigmacktrucks.com/index.php?/tutorials/article/37-b-model-transmission-data/

Jim

It doesn't cost anything to pay attention.

If a double OD version things are a bit different compared to single OD version. The model number will tell all.

IE: TRT 722 is single over. TRT 7220 is double over.

IMG-20180116-202556-655.jpg

Larry

1959 B61 Liv'n Large......................

Charter member of the "MACK PACK"

 

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