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Oliver, Cletrac, Co-op & Cockshutt Tractors Discussion Forum
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Super 66 Rear End

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Super 66 puller

08-31-2005 16:23:36




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I am curious if the 66's and the Super 66's had two different gear ratios in the rear end like the 88's and Super 88's? Any opinion's? If so, what were they, and how can you tell without tearing it down?

Thanks for the help, I have a 66 that just can't quite hack second gear, and first gear is a sure bet spin out.




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Marty J

09-01-2005 18:31:56




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 Re: Super 66 Rear End in reply to Super 66 puller, 08-31-2005 16:23:36  
There were actually 5 different ring and pinion sets that Oliver utilized to vary the speed of the tractors. The slowest was a 9 tooth pinion mated with a 46 tooth ring gear. Also called the 9x46. The next fastest was an 11x47, then 13x50, then 14x45, and the fastest of all was the 15x46. If you know how to read the numbers behind the serial #, you can tell which set up you have. I have seen articles written about identifying which ring and pinion you have by looking at these numbers behind the serial #. But, no one has ever clarified to me, which ring and pinion you have based on the number behind the serial # of your tractor. Maybe J Schwiebert can shed some light. I have always just pulled the covers off, jacked up a rear tire, spun the wheel, and counted teeth. I have a few of the slow speed ring and pinions (still in rear end of junked out tractors) if you are interested. Phone # is (316)722-4270

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stroker 88

08-31-2005 18:51:17




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 Re: Super 66 Rear End in reply to Super 66 puller, 08-31-2005 16:23:36  
there were 4 different ratios, the real low one even has a special lower first gear. don"t know how to tell without counting teeth.



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J. Schwiebert

08-31-2005 17:08:01




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 Re: Super 66 Rear End in reply to Super 66 puller, 08-31-2005 16:23:36  
What year 66 do you have. The older ones that have the transmission code are easy to tell. The 53 & 54 models do not list this in the serial number. The slow speed ring & pinon that was available for the 66 kind of became the standard set up for the Super 66 because of the higher RPM engine. How big is your engine? Can you find more horsepower easier?



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