jhunsch 20 #1 Posted May 20, 2011 :disgust: Would like to know do I have a 8 / 10 or 4 pinion. And what is it that makes the 8 pinion stronger that the 10 and 4. I have a B80 Id# from Tag on Tower is 61-08K801-12405 It has a Uni-Drve Part # on trans it is 2988185 It does have the 1 1/8 shafts. 8 speed Hi/Low Thanks :WRS: Share this post Link to post Share on other sites
TT-(Moderator) 1,145 #2 Posted May 20, 2011 You have a 1976 B-80 / 8 speed. If the tranz is original, it's a #5091 - which is the same tranz used in the first generation C series (up to 1976) and the '76 B-60/80/100. It does have the 8 pinion differential with 1 1/8" axles, which makes it the strongest factory-built differential of the Uni-Drives. They are stronger because of more and larger contact areas between the gear teeth, the size and design of the pinions, and the number of pinions. It has a Uni-Drve Part # on trans it is 2988185 2988185 is actually the PATENT number - not the part number. Share this post Link to post Share on other sites
jhunsch 20 #3 Posted May 21, 2011 Thank You TT. You have answered my questions. Every now & then I put a heavy load on, and its good to know I have the stronger trans. And I take my B60 to tractor pulls for the youth class pulls, kids really like to drive it. The B60 is a real slow mover and thats a good thing for the youth class. Thank you TT. :hide: Share this post Link to post Share on other sites
