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Case Tractors Discussion Forum
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COM vs. Powershift

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Glenn F.

03-26-2008 14:47:43




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It seems both of these transmissions are intimidating for the average guy to rebuild.

Which one is the simplist, and are either of them really that complicated...?


Thank you,
Glenn F.




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Bob/wis

03-28-2008 09:40:41




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 Re: COM vs. Powershift in reply to Glenn F., 03-26-2008 14:47:43  
Hey Glenn, If you get a chance emailme. Got a offer for you on VAC parts
Bob



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Jim B

03-26-2008 21:43:52




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 Re: COM vs. Powershift in reply to Glenn F., 03-26-2008 14:47:43  
I've rebuilt both. Believe the COM is much simpler, smaller (not as heavy to handle internals), and less complicated hydraulic control system. Also, less parts that may need repair and they're cheaper. Even less oil ($) to replace.

Plus, splitting an 800 (or most any 2WD) is much simpler than pulling the big 504 Turbo if the PS is in a 4x4 with a cab.



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mEl

03-26-2008 15:38:45




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 Re: COM vs. Powershift in reply to Glenn F., 03-26-2008 14:47:43  
It depends on your point of view I guess. I have grown up with both and there is nothing inherently wrong with either. I have done many powershifts and they are easy for me, a novice will find them challenging. There are special tools required for both, a holding fixture that makes COM removal and installation easier. On the PS transmission an air tool to aid in assembling the planetaries to C2 clutch, although I don't use that anymore. The valving will be over most peoples heads if the PS valve must be diagnosed and to properly diagnose a multiple gage set should be installed so each clutch pressure can be watched individually and in combination to check the 3 PS speeds plus reverse and clutch pedal down pressure. I guess I'm rambling, they both are great transmissions and will last indefinately if serviced as recommended

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