earlleecliffton 38 #1 Posted October 12, 2009 are all unidrive the same ratios? i have one on an 856 2988185 ,how to identifiy what year it really is? it has a 3 inch pully on it, is that standard on all of them? Share this post Link to post Share on other sites
Don1977 604 #2 Posted October 13, 2009 The gear ratio's are all the same 1st 66.8 to 1 2nd 42.4 to 1 3rd 24.4 to 1 Rev 51.5 to 1 The 3" pulley seams to be too small it would make the tractor pretty fast, but I don't know as I have a C series. Share this post Link to post Share on other sites
Indy w h 5 #3 Posted October 13, 2009 The factory pulley size on a uni drive is 4". If that helps u out. Indy Share this post Link to post Share on other sites
earlleecliffton 38 #4 Posted October 13, 2009 thanx so far Share this post Link to post Share on other sites
