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Oliver, Cletrac, Co-op & Cockshutt Tractors Discussion Forum
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66 rear end

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Author 
shrek

09-27-2006 18:27:54




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my buddy has a 66 rear end that he wants to use to build a pulling tractor with approx 200 horse. i don't think it will live what do you guys think?




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B A Star

09-27-2006 20:25:18




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 Re: 66 rear end in reply to shrek , 09-27-2006 18:27:54  
At 200 horsepower, you are about 8X what it was designed for.   If you are getting it to the ground, I don't see how you can expect it to do the job.

The differential carrier will be the most likely component to fail.  Most pullers that I know have devised a bearing to run on the back side of the ring gear in the area of the differential drive shaft to reduce the force.  I know of 66 rear ends that have failed at around 100 hp, and don't know of any 200 Hp pullers w/66 rear ends.

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The Tractor Shop

09-28-2006 07:37:10




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 Re: 66 rear end in reply to B A Star, 09-27-2006 20:25:18  
usually what we see is they spin em so hard they will score the pinion shafts on the carrier shaft. Seen the spiders spun so hard they weld themselves to the shaft and housing. The one wheel spin out is what will kill a high HP puller,, it thows all the power and torque to one side of the rearend, and if one side is tighter than the other, the slop from the loose side, when the other tire decides to spin again,, something snaps. If you equal out the load thru the rear end, mainly make the pinion shafts work together so they both spin. Sure hope its spinning at the end, cause if you put 200hp to the ground and stall it,,, you will break it. JMHO, The tractor shop.

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