youngstown.bulldog80 Posted July 9, 2019 Share Posted July 9, 2019 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? Quote Link to comment Share on other sites More sharing options...
tl1975 Posted July 9, 2019 Share Posted July 9, 2019 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. 2 Quote Link to comment Share on other sites More sharing options...
youngstown.bulldog80 Posted July 10, 2019 Author Share Posted July 10, 2019 6 hours ago, tl1975 said: 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. Will do thanks! Quote Link to comment Share on other sites More sharing options...
Truck Shop Posted July 10, 2019 Share Posted July 10, 2019 Three speed that has a low torque rating of 675 to 775 I believe. 1 Quote One ping only Link to comment Share on other sites More sharing options...
Freightrain Posted July 10, 2019 Share Posted July 10, 2019 (edited) 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 July 10, 2019 by Freightrain 1 Quote Larry 1959 B61 Liv'n Large...................... Charter member of the "MACK PACK" Link to comment Share on other sites More sharing options...
Hobert62 Posted July 11, 2019 Share Posted July 11, 2019 If I remember I think the 1 at the end means steel case a 2 would be aluminum. 2 Quote Link to comment Share on other sites More sharing options...
Hobert62 Posted July 11, 2019 Share Posted July 11, 2019 1 Quote Link to comment Share on other sites More sharing options...
tl1975 Posted July 13, 2019 Share Posted July 13, 2019 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. 1 Quote Link to comment Share on other sites More sharing options...
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