ronscat 2 #1 Posted December 6, 2009 I am replacing an old 4 speed transmission on my Wheel Horse puller with a 8 speed. Could someone please tell me if the final drive ratio is the same with the 4 spd vs the 8 spd? I pulled in 2nd with the 4 speed and will pull in second high range with the 8 speed. I want to have a pulley on the rear that is the same ratio that I had before. Thanks for your help, Ron Share this post Link to post Share on other sites
TT-(Moderator) 1,145 #2 Posted December 6, 2009 I'm not sure exactly what you're asking, Ron, but the 2nd gear ratio is 42.1 to 1 in a lot of transmissions. (in high range in the 8 speed, of course) The original engine to transaxle pulley ratio for the early 3/4 speed was 1.6 to 1 (2.5" engine pulley / 4" transaxle input pulley) The "newer" models (both 3/4 speed and 6/8 speed) received the 4" engine pulley and (I think) a 6.75" transaxle pulley for a 1.6875 to 1 ratio. I have no idea what configuration you have been using, so you'll have to do the math on your current pulleys. :notworthy: Share this post Link to post Share on other sites
ronscat 2 #3 Posted December 6, 2009 I was using a 5 inch pulley on the transmission on the 4 speed and pulling in 2nd gear. If I put the same 5 inch on the 8 spd and pulling in 2nd high should I still have the same final drive? I would be using the same size pulley on the engine that I had on the 4 spd. Thanks, Ron Share this post Link to post Share on other sites
rickv1957 72 #4 Posted December 6, 2009 I think that the 8 speed would be the same as you will use the same size pulleyRick Share this post Link to post Share on other sites
Indy w h 5 #5 Posted December 6, 2009 You will have a little "faster" wheel speed with the high range because of the "in between gears" if that helps ya out Indy Share this post Link to post Share on other sites
TT-(Moderator) 1,145 #6 Posted December 6, 2009 If I put the same 5 inch on the 8 spd and pulling in 2nd high should I still have the same final drive? Yes. :notworthy: Share this post Link to post Share on other sites
W9JAB 156 #8 Posted December 7, 2009 http://www.wheelhorseforum.com/index.php?showtopic=12917 may what to look at this! Share this post Link to post Share on other sites
ronscat 2 #9 Posted December 7, 2009 Anyone know a good place to order pulleys? I need a BK5.2, 5/8" bore. Thanks, Ron Share this post Link to post Share on other sites
W9JAB 156 #10 Posted December 7, 2009 Grainger # 3x844 http://www.grainger.com/Grainger/wwg/searc...844&N=0&sst=All Share this post Link to post Share on other sites
W9JAB 156 #11 Posted December 7, 2009 sorry I thought you said Bk52, you what a bk, @ 5.2 in. Share this post Link to post Share on other sites
ronscat 2 #12 Posted December 7, 2009 Yes, I think they call it a 5.2 inch although the BK5 pulley I have is actually less than 5 inches. I need a BK5.2. I got a price of $25 already. Just wondered if there was a cheaper price somewhere. Share this post Link to post Share on other sites
Indy w h 5 #13 Posted December 7, 2009 You can go to tractor supply and buy a 5" pulley with a 5/8 weld in insert just weld the insert in and your good to go Indy Share this post Link to post Share on other sites
ronscat 2 #14 Posted December 7, 2009 I was by there earlier today. Everything looked like some sort of lightweigh casting. I think I will go ahead and buy the steel pulley. Thanks though. Ron Share this post Link to post Share on other sites
Jim_M 178 #15 Posted December 7, 2009 McMaster Carr is a little cheaper than Grainger. Share this post Link to post Share on other sites
sorekiwi 761 #16 Posted December 8, 2009 https://www.surpluscenter.com/sort.asp?numr...009120720212402 Cast iron, $11-$13 in the range you are looking at... Share this post Link to post Share on other sites
