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It's been a while since I've been exposed to anything with 2 sticks, but I believe you're correct about the auxiliary transmission being a 3 speed. But look closer at the tag, because it may say 8031C instead of E.

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Typically the first two digits are the torque rating(80= 800 ft/lbs).  The 3 is three speeds.  Not sure what the "1" denotes.  The letter is typically the gear ratio.

I used to have a Spicer sheet saved that listed everything.

 

Found this:

AUXILIARY TRANSMISSION: Spicer 8031G, 8035G; reductions: 1.29, 1.00, .84.

8031C, 2.59, 1.00, .75.

8341A, 2.40, 1.29, 1.00, .84

Edited by Freightrain
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Larry

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

Charter member of the "MACK PACK"

 

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On 7/9/2019 at 7:59 AM, youngstown.bulldog80 said:

Attempting to identify a couple main/aux transmission setups. The ID tags are as follows: Main - Fuller 5H74T,  Aux - 8031e....I'm guessing that the main is simply a 5 speed direct in 5th (looks like single countershaft), but is the 8031e an old spicer 3 speed aux transmission?

That Fuller 5H74T you mention, it's an ancient 5 speed transmission, I think it pre-dates the T905 series. It's very small (if I'm remembering correctly), and I don't even think you can get internal parts for those anymore.

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