On 27 Nov 12 20:46, Mark Hofmann wrote to Chris Krascek:   
      
      
      
    CK>> Hey all,   
    CK>> I'm just wondering if the transmission should be flushed versus   
    CK>> drained. I had heard a lot of talk with the process to flush and the   
    CK>> caustic fluid used which could harm. In talking to the mechanics at   
    CK>> the lube shop, he assures me this is not the case. I had it done on   
    CK>> another vehicle and it was fine. I think the machine used may have   
    CK>> sucked and pumped at the same time but I could be wrong. Also, does   
    CK>> brake fluid need to flushed or are they just trying to make money of   
    CK>> me?   
      
    MH> The only time I have ever had anything done with transmission fluid   
    MH> was I had to get a flush after my radiator failed and allowed the   
    MH> antifreeze to mix with the transmission fluid.  Even after the flush,   
    MH> the transmission fluid was not perfect in red color.   
      
   It should be.   
      
    MH> I have heard two schools of thought on the tranmission fluid   
    MH> flush/drains. Some people swear that not doing either is the best.   
    MH> Not sure there is a right answer.   
      
   I've seen it done both ways and would prefer a pan removal, an inspection   
   of the pan 'contents' and a filter change before it went back together.   
   This method leaves a quart or so of fluid in the converter, but the   
   inspection is the most important part to me.   
      
   If there's a lot of debree in the pan, you can expect small amounts   
   because of clutch wear, I'd be thinking of a rebuild in the future.   
      
    MH> Never heard of replacing brake fluid.   
      
   Should be done occasionally. My Silverado is ten years old and the brake   
   fluid is getting a bit dark...I'll change out what's in the master   
   cylinder and replace that fluid soon.   
      
      
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